Robin, thank you for your contributions to the RUclips machining community. It is fascinating to see creators like you and Tom Lipton, Stefan Gotteswinter, Steve Barton, and so many others share knowledge and experience for the benefit of all. Seeing into your metrology thought process shows how the hobbyist machinist can significantly raise the level of work quality with even modest machine tool resources in the home shop. This is fascinating stuff!
So I worked at a shop here in TX and when we started movin on up in bigger things(ISO9001,ASI, etc..) we had to go through this monster process of calibrating everything and logging and traceability etc... well we had a few granite surface plates that needed checking, verification and certifications. The main QC table was a 6' x 6' black granite plate. So, we had Trescal come out and give em the go. The QC guys over the years had used one corner of the large plate as a "desk" and a parking station and the area next to it was the main area used to check parts using squares, height gauges etc. Well, the guy from Trescal upon his primary examination of the table with an [antique] surface gauge that measures .00001 then using a laser, we had a few severely worn low spots. Anyways, as a machinist of 11 years at that time(2014), and always looking to learn something new for future reference, I stuck to the old timer doing the work on the table. Inquiring about technique, cause and effect, why this instead of that.. so..... the only difference between your technique and his, was that when he was lapping, 1. He had a partner to slide the cast iron lap plate to across the table, 2. He always used a roll of unrolled paper towels (by always I mean for any cleaning at all on every table). Only peeling off the sheets after a wipe. He said his reason for that was because when using rags or reg towels, you always get build up and one wipe and the towel has always got residue, which he didn't want when re-wiping(maybe his personal technique only, not sure). 3. He slid the lap plate back and forth along but also in a cris-cross diagonal direction as well, like a cross hatch. And 4. He sprinkled the lapping powder directly on the granite surface plate. Didn't ask why as he'd been doing it for 20 years that way and that table was like brand new when he was done. Good videos brother. God bless ya.
great comment, Thanks... the one wipe, I do also, seems a little bit of a waste but I get paper towel fragments if I use one too much or just fine lent fragments. thanks again for your comment, it was informative
Thank you Robin!! And thank you for reloading at regular speed!!! You’re contribution to the machining community is absolutely incredible!!!! Thank you!!!!!
Excellent! Thank you for sharing your journey. The details of your thinking process are invaluable. Who would think that just changing where you stand on a concrete slab would change the level of the plate. Looking forward to the next video.
Iam curious what your old day job was and how you got started in the trade... no worries if you wanna keep it personal but iam curious. Love the surface plate stand.
Never be afraid to explain your thoughts. It is one of the greatest attractors to your channel, besides your obvious knowledge. You and Tom are some of the best at this detailed teaching method. Sincerely, thank you.
Pretty cool stuff. The guys that field lapped my granite plates were pretty liberal with the loose diamond when they recharged the laps. It was more like dusting a sand casting with parting powder. Got to love a level for quick assessments. That Shars box level seems to perform pretty well for $75. Talk to you soon. Tom
Hi Chris. Standridge used loose diamond which they also rolled into the cast iron lap. I'm also pretty sure there was some loose abrasive similar to what you see on Robins video. They had a big ball bearing roller with handles and a big dude to smoosh the diamond into the lapping plate. --Tom
You are unable to bore me. I was paying close attention throughout and the video seemed to come to an end way sooner than what I was expecting when I first saw it's length. I've seen plenty of videos on the subject, so, everything seemed familiar. But you did excell on explaining the little details that one would usually miss out on. Thank you for another short clip, can't wait for the next one!
Great video looking forward to the finished result. I don't know if this is something I would attempt to do myself. But than as you said you got the plate for free what could be the worst that could happen. If you don't try you don't know. Excellent learning experience.
Kinda like AvE says "It's already F@ckered you can't F@ck it up any more so what the hell" LOL I have a feeling this plate will be far from F#%ked at the end of this.
I heard you talk about reading the books written by Moore about accuracy, and said they are books you can read multiple times. And each time you read them you learned new things, matching on your increased level of knowledge gained between each time you read them. I consider your videos the same way. They contain so much useful knowledge and information you will pick up something new even the 3rd and 4th (and 5th and so on) time you watch them. One really important key is the idea that you want your viewers to know the thought process going on while doing what seems to be an easy job. That is incredibly valuable, and what brings your videos (and other contributions like instagram and participating on podcasts) to the level that makes them stand out. Your philosophy behind your knowledge sharing is truly amazing! Thank you so much for putting inn the effort it takes to make these videos! I look forward to the next ones, as I'm planning on lapping in my plate too. Now I have you to guide me through that, which makes it feel so much less daunting.
Boring video? Not hardly, understanding a persons thought processes and that 'why and how' there doing something in the order they are is one of many things that's great about your channel Robin. I've always thought the videos I've seen about the way professionals resurface granite plates only looks simple and that there's was a whole lot more technique to it than it seems. My guess is it takes years of experience to get real good and fast at it. Your past track record shown on every video gives me zero doubt you'll get this plate back to at least as good as any pro would have if not far better and I'm very grateful your willing to show the process here.
Thanks so much for your video and knowledge. I just finished lapping my granite with great results. Started back with Tom Lipson's three plate lapping 6" round videos, created my own 10x14 lapping plates, designed and built my own repeater meter with LVDT, & got an Autocollimator. It's been a very rewardable journey and tons of fun. Could not have done this without your videos and oxtools. I likely post a summary video soon in my channel.
Explaining your thought process only bores folks that aren't truly interested in understanding what's being done. I can hardly wait for the next session!
@zomgthisisawesomelol Actually you are quite wrong. According to my research: "Granite is not considered a mineral because granite is a ROCK. It is an intrusive, igneous rock, comprising a combination of SEVERAL minerals, chiefly sodic and/or potassic feldspars, quartz and biotite or hornblende."
I am a new viewer. This is my third or fourth video of yours. I must say, that I am more impressed and more encouraged the more I watch. It is such an honor to see someone of your character explain your thought processes and your love of the work you do. Thank you. And by the way you used the term "false humility" ...you didn't learn that in engineering school.
I agree, we are loosing our manufacturing awesomeness guys like this are so valuable fewer and farther between hopefully we start buying american more and supporting our manufacturing we could still save it
A fantastic journey Robin, it is fascinating listening to your thought processes as you go about this work. Thank you for posting this and I look forward to the rest of the videos.
Yeah. Stellar individual all the way around. Freak of nature. Being in my trade so long I can completely identify with the statement of mental decisions and evaluations being made on a nanosecond level. I envision almost a mental vision of the shape of the plates by feel and sound at the rough stages that is corroborated by measurements. The phrase "when you see someone doing something that looks so easy, its likely the hardest thing you will ever try to do" is something i live by. For me it goes from welding, to making candy, a cake, loaf of bread. There is massive amount of technique in running a shovel. Im not a machinist but watch every one of your videos with full attention. The entire philosophy on working cross applies to anything and everything in life. Phenomenal
Thanks Robin. Very educational. I've see video's of surface plates being lapped, but no dialogue about what they were doing. Your experimenting really helped understand how to do it right.
Nice video! In Chinese home workshops, surface plate was manufactured by one person lapping a piece of grantie on a bigger piece of grantie. That's definitely a hard work. You must move hundreds kilos continuesly.
I appreciate you summarizing your experience up at the end, seeing how you actually did it was helpful but keeping track of the lessons learned over a 48 minute video is not for most people.
Same style action circular rotation to the lap ..but in a figure 8 pattern and count your passes. Descending grit charge if you need. My father taught me about the auditory aspects of the lap and grit choice. The harmonics through the lap tell surface roughness. Finer grits have a higher pitch through the charged lap. Depending on the porosity of the rock and certification target. It may not be what you want in finish quality. Continuity is vital in combination with other factors, charging, media, slurry type, grit and "style dancing" with the lap ! I mean you did just dress it with diamonds!!! He used to say "make a music instrument" and it will tell you when its done"".
Thanks for the input! What is the finest micron diamond you used for AA plates? I noticed the surface finish of my Starrett master pink AA plates was much finer than the average plate.
Robin, I am really excited to see the follow up to this vid. I watch all of your vids asap when they post-saw this one before audio correction;). I really appreciate the detail you go into and can't wait for the next chapter.
hello again, you know but others may not that what ever you attempt to do is in the details and details come from knowledge and experience. I always like to learn new things.
Simply brilliant. Thank you for taking the time to make this. I knew there was no way you would not be able to resist touching up those glued carbide feet with something.
I thought this has been very interesting. Even if we never rework our surface plates, who knows where else the lessons learned and creative thought processes exercised will be of use? THANKS, Robin!
Exceptional. Working on orphan free granite surface plate as well. Really appreciate your sharing your thoughts and experience with those of us inclined to such ventures.
You have inspired me. I found a piece of stone 13x18x2.25in, I think mainly quartz; a cast iron kitchen griddle weight and a piece of brass, pretty flat and hollow. Now marking the stone with the brass and I'm working in the lap. That was after watching your video the first time.
This was fascinating. I thought watching something like this would be dull. It's anything but. I'll be curious to see what you utilize such a large plate for.
I love the attitude. if you get it wrong just do it again. don't be afraid of failure or what people are going to say. if you never fail you never learn. ill do 3 plate(bit smaller than yours)
Excellent video! Simply fascinating. The subtleties and nuances are the hardest to find info on and you explain and ponder (out loud) upon them beautifully and with humility. Subscribed to your channel 5 minutes into this. Seriously great video, keep em coming!
I had a great time. You anticipated my questions before I had them formed. You are right why the heck not try. Lots of great tips that carry to other things. _Dan_
Informative video and love the hidden teachings; keep track of what you have been doing so that as you evaluate and review results, you can determine if they pass the test of reasonableness. Thanks!
I find the changing sounds fascinating, several different sounds throughout the lapping process! All of your senses are being use during the process. Thanks
"too far gone" I would question the people doing the lapping on that. Its a rock, i didnt just pop out of the ground in the true flat state. Someone had to make it that way, I think it was a lack of skill not the plate. The only plate that was ever turned down to be lapped at our shop was on that had a hot part left on it and basically burned a hole in it (Dont ask how this happened it was clearly a really really dumb Welder) other than that never not had one done. Good video as always.
Tom Lipton recommended your channel. I realize this is an old video, but I'm going to pick up a 4x8x18" surface plate of unknown flatness on Thursday this week, and I have some clue as to what I should be looking for, and I can make a determination as to whether it's a good buy. Thanks.
I still can hear you sliding around that plate. And getting its surface covered with tiny little diamond corns. I pretty much guess it takes time like scraping to a nice bearing. I like your content. AND its something you can really talk about afterwards. Not just plain watching 'and there you go'.
I like the videos, even in real time. If you're anxious about people disliking the video due to the length, I don't think it would be at all a bad idea to recommend the use of the speed up function
I thought you were getting a little picky when using a counter weight on the level, I was surprised how much it made a difference. Great video and channel!
Interesting stuff. Liked the use of the level square and base with carbide feet to map it out. I am looking at that for the next 6ft straight edge I have to restore. Thanks for all your thoughts as you progress All the best Mat
Thanks once again for another very educational, interesting, and thoughtful video! I really appreciate your sharing your knowledge and thought process. I look forward to more lapping and the Renz-O-meter!
To do a differential compensation as accurately as possible, a weight moving towards each corner would work best. I know that’s a pain, but if the most accurate readings are wanted, each side, as well as the diagonal, should be taken into account, with diagonal corners having the largest droop. Of course, the heavy cast iron plate sitting on the granite plate is influencing the readings more than the differential weight is, by an order of magnitude. The truth is that the thickness of the plate is going to negate most of the effects anyway. I’m pretty sure you’ll get this right even without the differential compensation.
I was looking at that little weight he was using to balance the level, then back to the giant cast iron lap on the corner... I can only assume that there's no measurable flex in an 8" granite slab, and it's only in the platform? So the position of the lap will change the absolute position of the plate, but not the curvature. Since the measurement is all relative, the change caused by the fixed position of the lap doesn't show up? Now, the loading of the frame will cause it to respond differently to different minor changes. Going from 0 to 5 oz will likely make a bigger change than going from 1000 to 1005 ounces. Then again, the frame is already loaded with the enormous weight of a 1400 lb granite slab... It's fascinating to think through things at this level of precision.
i received some of that 40 microns diamond powder today, this is so fine there is no way to distinguish the grains by eyes. i was afraid this would be too fine for lapping, had to double check the ultimate source.
I can't tell you how much I appreciate your work. Especially between your precision spindle video and this one, you've opened up a whole new world to me. What really helps is your commentary and explanation. Do you have a video about the machinists level frame? Even a retrospective would be helpful, or, what would be really grand would be for you to make a video building another one - a larger one, perhaps? Or a gift? Or a prize? One more thing - please set up the RUclips "join" function. I would like the opportunity to set up monthly payments to compensate - at least on a token basis - you for how much you're teaching me. Likely there are others who feel the same way - your work is exceptional. #EverythingIsRubber
Glad you like the content! Hit the "show more" at the bottom of the video description and there are links to Patreon for setting up monthly donations or Paypal for one time donations.
You have great attitude to work. I wouldn't lap dry however and also using diamond powder is more or less unnecessary, cheap SiC or AlO2 will do just fine. I wouldn't overhang tool as much because it can turn the edge down, your tool is also quite small.
I guess you could use another granite surface plate as a hone, especially when coated with foil unless you want to want to resurface the hone. Reynolds makes a teflon coated foil if that is of any use.
I watched this clip several years ago and clicked like back then. It's a pity I can't add a like each time I watch it. Thanks Rod, keep on learning so we can learn along with you.
The heat from your hands might actually be helpful to combat the heat from the friction of lapping, although I suppose it's much less evenly distributed, and the sole of the plate expanding might already be counteracted by the tendency for the lap to go convex. So much to consider in a world where everything it so wiggly.
![Twenty One Pilots - “The Line” (from Arcane Season 2) [Official Music Video]](http://i.ytimg.com/vi/E2Rj2gQAyPA/mqdefault.jpg)
Absolutely enjoyed!
So much to learn, so little time...
Stefan
Robin, thank you for your contributions to the RUclips machining community. It is fascinating to see creators like you and Tom Lipton, Stefan Gotteswinter, Steve Barton, and so many others share knowledge and experience for the benefit of all. Seeing into your metrology thought process shows how the hobbyist machinist can significantly raise the level of work quality with even modest machine tool resources in the home shop. This is fascinating stuff!
iPleinAir could you please point me to Steve Barton's channel? You got me curious....
Pedro, Steve Barton’s channel is Solid Rock Machine Shop.
iPleinAir Thanks! Thought I had them all but it seems I'll be back to batch consuming shop videos :)
Thanks, and thanks for watching and commenting.
So I worked at a shop here in TX and when we started movin on up in bigger things(ISO9001,ASI, etc..) we had to go through this monster process of calibrating everything and logging and traceability etc... well we had a few granite surface plates that needed checking, verification and certifications. The main QC table was a 6' x 6' black granite plate. So, we had Trescal come out and give em the go. The QC guys over the years had used one corner of the large plate as a "desk" and a parking station and the area next to it was the main area used to check parts using squares, height gauges etc. Well, the guy from Trescal upon his primary examination of the table with an [antique] surface gauge that measures .00001 then using a laser, we had a few severely worn low spots.
Anyways, as a machinist of 11 years at that time(2014), and always looking to learn something new for future reference, I stuck to the old timer doing the work on the table. Inquiring about technique, cause and effect, why this instead of that.. so..... the only difference between your technique and his, was that when he was lapping, 1. He had a partner to slide the cast iron lap plate to across the table, 2. He always used a roll of unrolled paper towels (by always I mean for any cleaning at all on every table). Only peeling off the sheets after a wipe. He said his reason for that was because when using rags or reg towels, you always get build up and one wipe and the towel has always got residue, which he didn't want when re-wiping(maybe his personal technique only, not sure). 3. He slid the lap plate back and forth along but also in a cris-cross diagonal direction as well, like a cross hatch. And 4. He sprinkled the lapping powder directly on the granite surface plate. Didn't ask why as he'd been doing it for 20 years that way and that table was like brand new when he was done.
Good videos brother. God bless ya.
Was the, "desk'" area more or less worn than the rest?
great comment, Thanks... the one wipe, I do also, seems a little bit of a waste but I get paper towel fragments if I use one too much or just fine lent fragments. thanks again for your comment, it was informative
Thank you Robin!! And thank you for reloading at regular speed!!! You’re contribution to the machining community is absolutely incredible!!!! Thank you!!!!!
Thanks, and thanks for watching and commenting.
Old carpenter saying. 3 points is a plane, 4 is a pain. Enjoyed the video.
Thanks, and thanks for watching and commenting.
Excellent! Thank you for sharing your journey. The details of your thinking process are invaluable. Who would think that just changing where you stand on a concrete slab would change the level of the plate. Looking forward to the next video.
Thanks, and thanks for watching and commenting.
somewhere in Germany someone just ordered diamond powder, a2, a bearing, and a cast iron plate...
vettepicking Stefan, placed your order yet?
LOL
Awesome! thanks for that, at least we know they are obtainable now I'll do a little lookin
Iam curious what your old day job was and how you got started in the trade... no worries if you wanna keep it personal but iam curious. Love the surface plate stand.
You are one of the most intelligent and humble guys on RUclips. Thanks for posting this Robin! Looking forward to continued learning.
Thanks for the kind words Justin, and thanks for watching and commenting.
ATB, Robin
Never be afraid to explain your thoughts. It is one of the greatest attractors to your channel, besides your obvious knowledge. You and Tom are some of the best at this detailed teaching method. Sincerely, thank you.
I was going to post a comment much to the same effect. I learn a ton by watching and thinking through along with these guys.
Pretty cool stuff. The guys that field lapped my granite plates were pretty liberal with the loose diamond when they recharged the laps. It was more like dusting a sand casting with parting powder. Got to love a level for quick assessments. That Shars box level seems to perform pretty well for $75.
Talk to you soon.
Tom
Hi Chris. Standridge used loose diamond which they also rolled into the cast iron lap. I'm also pretty sure there was some loose abrasive similar to what you see on Robins video. They had a big ball bearing roller with handles and a big dude to smoosh the diamond into the lapping plate.
--Tom
Totally loved that vid! YT then brought me here in my travels. Thanks for the awesome tutorial!
You are unable to bore me. I was paying close attention throughout and the video seemed to come to an end way sooner than what I was expecting when I first saw it's length.
I've seen plenty of videos on the subject, so, everything seemed familiar. But you did excell on explaining the little details that one would usually miss out on.
Thank you for another short clip, can't wait for the next one!
Thanks, and thanks for watching and commenting.
Serious patience required for this! Takes a special set of personal traits to make it happen. No nitwits need apply!
Great video looking forward to the finished result. I don't know if this is something I would attempt to do myself. But than as you said you got the plate for free what could be the worst that could happen. If you don't try you don't know. Excellent learning experience.
Kinda like AvE says "It's already F@ckered you can't F@ck it up any more so what the hell" LOL I have a feeling this plate will be far from F#%ked at the end of this.
Thanks Peter, and thanks for watching and commenting.
ATB, Robin
Excellent! A rare opportunity to grow with the teacher and experience the process in the making. Thank you!
Thanks, and thanks for watching and commenting.
I heard you talk about reading the books written by Moore about accuracy, and said they are books you can read multiple times. And each time you read them you learned new things, matching on your increased level of knowledge gained between each time you read them.
I consider your videos the same way. They contain so much useful knowledge and information you will pick up something new even the 3rd and 4th (and 5th and so on) time you watch them.
One really important key is the idea that you want your viewers to know the thought process going on while doing what seems to be an easy job. That is incredibly valuable, and what brings your videos (and other contributions like instagram and participating on podcasts) to the level that makes them stand out.
Your philosophy behind your knowledge sharing is truly amazing! Thank you so much for putting inn the effort it takes to make these videos!
I look forward to the next ones, as I'm planning on lapping in my plate too. Now I have you to guide me through that, which makes it feel so much less daunting.
Thanks, and thanks for watching and commenting.
I think you can skip the gym this week Robin! Really enjoyed this.
Thanks Stan, and thanks for watching and commenting.
ATB, Robin
It was so good the first time I watched it again. Thanks for sharing Robin.
Thanks again Randy, and thanks for watching and commenting.
ATB, Robin
Boring video? Not hardly, understanding a persons thought processes and that 'why and how' there doing something in the order they are is one of many things that's great about your channel Robin. I've always thought the videos I've seen about the way professionals resurface granite plates only looks simple and that there's was a whole lot more technique to it than it seems. My guess is it takes years of experience to get real good and fast at it. Your past track record shown on every video gives me zero doubt you'll get this plate back to at least as good as any pro would have if not far better and I'm very grateful your willing to show the process here.
Thanks, and thanks for watching and commenting.
Thanks so much for your video and knowledge. I just finished lapping my granite with great results. Started back with Tom Lipson's three plate lapping 6" round videos, created my own 10x14 lapping plates, designed and built my own repeater meter with LVDT, & got an Autocollimator. It's been a very rewardable journey and tons of fun. Could not have done this without your videos and oxtools.
I likely post a summary video soon in my channel.
Fantastic!
Renzetti Content Level: Over 9000
Awesome Vid Robin
Thanks, and thanks for watching and commenting.
I watched it again with the fixed audio. Much better, thank you for sharing this info! Excellent!
Explaining your thought process only bores folks that aren't truly interested in understanding what's being done. I can hardly wait for the next session!
What would you prefer he talk about? Lol. You do know this video is for those that want to learn, right? Lmao.
I just watched a video of a big rock for 45 minutes.
When's the next one? :-)
This is wonderful, thank you.
@zomgthisisawesomelol Actually you are quite wrong. According to my research: "Granite is not considered a mineral because granite is a ROCK. It is an intrusive, igneous rock, comprising a combination of SEVERAL minerals, chiefly sodic and/or potassic feldspars, quartz and biotite or hornblende."
I am a new viewer. This is my third or fourth video of yours. I must say, that I am more impressed and more encouraged the more I watch. It is such an honor to see someone of your character explain your thought processes and your love of the work you do. Thank you. And by the way you used the term "false humility" ...you didn't learn that in engineering school.
Wow, thank you!
I agree, we are loosing our manufacturing awesomeness guys like this are so valuable fewer and farther between hopefully we start buying american more and supporting our manufacturing we could still save it
Great show Robin. Thank you for sharing your time and many talents!
Thanks, and thanks for watching and commenting.
A fantastic journey Robin, it is fascinating listening to your thought processes as you go about this work. Thank you for posting this and I look forward to the rest of the videos.
Yeah. Stellar individual all the way around. Freak of nature. Being in my trade so long I can completely identify with the statement of mental decisions and evaluations being made on a nanosecond level. I envision almost a mental vision of the shape of the plates by feel and sound at the rough stages that is corroborated by measurements.
The phrase "when you see someone doing something that looks so easy, its likely the hardest thing you will ever try to do" is something i live by. For me it goes from welding, to making candy, a cake, loaf of bread. There is massive amount of technique in running a shovel.
Im not a machinist but watch every one of your videos with full attention. The entire philosophy on working cross applies to anything and everything in life.
Phenomenal
Thanks for the kind words, and thanks for watching and commenting.
this is an odyssey... the plate, the tools, the grinder I'm waiting for your tips before starting all mine! I love your work
Thanks, and thanks for watching and commenting.
Thanks Robin. Very educational. I've see video's of surface plates being lapped, but no dialogue about what they were doing. Your experimenting really helped understand how to do it right.
Thanks, and thanks for watching and commenting.
Love the counter balance level idea Robin. I have no doubt that plate is going to be spot on.. Thumbs up for sure
Thanks Steve, and thanks for watching and commenting.
ATB , Robin
Nice video! In Chinese home workshops, surface plate was manufactured by one person lapping a piece of grantie on a bigger piece of grantie. That's definitely a hard work. You must move hundreds kilos continuesly.
If only Caesar knew what Robin renzetti could do with one of his stairs.
Thanks for all the time you are taking to help/show everyone.
Your welcome, and thanks for watching and commenting.
I appreciate you summarizing your experience up at the end, seeing how you actually did it was helpful but keeping track of the lessons learned over a 48 minute video is not for most people.
Same style action circular rotation to the lap ..but in a figure 8 pattern and count your passes. Descending grit charge if you need.
My father taught me about the auditory aspects of the lap and grit choice. The harmonics through the lap tell surface roughness. Finer grits have a higher pitch through the charged lap. Depending on the porosity of the rock and certification target. It may not be what you want in finish quality.
Continuity is vital in combination with other factors, charging, media, slurry type, grit and "style dancing" with the lap ! I mean you did just dress it with diamonds!!!
He used to say "make a music instrument" and it will tell you when its done"".
Thanks for the input! What is the finest micron diamond you used for AA plates? I noticed the surface finish of my Starrett master pink AA plates was much finer than the average plate.
Superb! You have turned an otherwise boring procedure into a great teaching experience! Thank you, and I look forward to the follow-ups!
Thanks, and thanks for watching and commenting.
This channel is like rocket science for the layman. Thank you for what you do, always enjoy the vids and learn so much!
Thanks, and thanks for watching and commenting.
This is such a great video! Thank you for posting a quality breakdown of your thought process.
Glad it was helpful!
Robin, I am really excited to see the follow up to this vid. I watch all of your vids asap when they post-saw this one before audio correction;). I really appreciate the detail you go into and can't wait for the next chapter.
Hi Robin,
Love the videos and the education. Keep them coming.
Steve
Thanks Steve, and thanks for watching and commenting.
ATB, Robin
That bubble movement around 32:00 from the weight of the compensator was very interesting to see. Great videos.
Did not expect that.
hello again, you know but others may not that what ever you attempt to do is in the details and details come from knowledge and experience. I always like to learn new things.
I learned more, by watching these videos, for a day, then I did in a few years at school!! 😁
Simply brilliant. Thank you for taking the time to make this. I knew there was no way you would not be able to resist touching up those glued carbide feet with something.
Thanks, and thanks for watching and commenting.
I thought this has been very interesting. Even if we never rework our surface plates, who knows where else the lessons learned and creative thought processes exercised will be of use? THANKS, Robin!
What can I say! I like the way you think,and what you do, and your detail in teaching.
Exceptional. Working on orphan free granite surface plate as well. Really appreciate your sharing your thoughts and experience with those of us inclined to such ventures.
Thanks, and thanks for watching and commenting.
Cool video Robin, enjoyed as always! Thank you. Looking forward for more.
Thanks, and thanks for watching and commenting.
Your doing great don't let the neigh sayers in your mind creep in, your have much to share...
Thanks for taking the time to film and share this. Seeing your thought process is very interesting.
Thanks, and thanks for watching and commenting.
This is not something I'll ever do, but it is fascinating to watch. Thanks for taking the time and effort to document this Robin.
Thanks, and thanks for watching and commenting.
You have inspired me. I found a piece of stone 13x18x2.25in, I think mainly quartz; a cast iron kitchen griddle weight and a piece of brass, pretty flat and hollow. Now marking the stone with the brass and I'm working in the lap. That was after watching your video the first time.
Thanks, that's nice to hear and keep at it!
This was fascinating. I thought watching something like this would be dull. It's anything but. I'll be curious to see what you utilize such a large plate for.
RUclips machinist bragging rights atleast? ;)
To brag that he has a bigger plate than Tom. hahahaha
Rolling pizza dough?
Thanks, and thanks for watching and commenting.
You will see it on the grinder rebuild videos
Thanks for the audio fix!
Always helps renew my faith in mankind when I see someone getting something done that most would claim can't be.
Enjoying every minute. More than happy to hear you thoughts. For me it the difference between good and excellent
Thanks, and thanks for watching and commenting.
Great information yet again. Many thanks. John.
I love the attitude. if you get it wrong just do it again. don't be afraid of failure or what people are going to say. if you never fail you never learn.
ill do 3 plate(bit smaller than yours)
Robin - Fantastic Video, I have been thinking about this topic for a long time and so glad you are covering it. Love your work...........
Excellent video! Simply fascinating. The subtleties and nuances are the hardest to find info on and you explain and ponder (out loud) upon them beautifully and with humility. Subscribed to your channel 5 minutes into this. Seriously great video, keep em coming!
Very interesting, especially how quickly material can be removed. Thanks Robin.
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Really enjoying this. Thanks for the effort you put into making these videos. I really enjoy hearing your thiught process and learning from it.
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I had a great time. You anticipated my questions before I had them formed. You are right why the heck not try. Lots of great tips that carry to other things.
_Dan_
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Very interesting, I've always wondered about how lapping was done.
Thanks for sharing.
Part 2 Part2!! Can't wait!! Thank you for the video.
@35:16 Mitigates effect of weight with counter weight yet have massive lapping plate sitting on back corner
It’s static, so doesn’t affect the level readings. If he moved it at any point, then it would affect the measurement. Hope that helps?
This is THE contribution
Thanks, Robin
I'll be doing lapping soon, want to reuse your suggestions and skills
Informative video and love the hidden teachings; keep track of what you have been doing so that as you evaluate and review results, you can determine if they pass the test of reasonableness. Thanks!
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Fascinating Robin! Thanks for sharing! Looking forward to the follow-on episodes.
I find the changing sounds fascinating, several different sounds throughout the lapping process! All of your senses are being use during the process.
Thanks
"too far gone" I would question the people doing the lapping on that. Its a rock, i didnt just pop out of the ground in the true flat state. Someone had to make it that way, I think it was a lack of skill not the plate. The only plate that was ever turned down to be lapped at our shop was on that had a hot part left on it and basically burned a hole in it (Dont ask how this happened it was clearly a really really dumb Welder) other than that never not had one done. Good video as always.
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Tom Lipton recommended your channel. I realize this is an old video, but I'm going to pick up a 4x8x18" surface plate of unknown flatness on Thursday this week, and I have some clue as to what I should be looking for, and I can make a determination as to whether it's a good buy. Thanks.
I still can hear you sliding around that plate. And getting its surface covered with tiny little diamond corns.
I pretty much guess it takes time like scraping to a nice bearing.
I like your content. AND its something you can really talk about afterwards. Not just plain watching 'and there you go'.
Always share your thought process. Helps your viewers learn the problem solving methods.
You can make a diamond paste with some oil / fat that will transport diamond better than alcohol and it's white opaque too instead of clear.
I like the videos, even in real time. If you're anxious about people disliking the video due to the length, I don't think it would be at all a bad idea to recommend the use of the speed up function
I uploaded a new version with fixed audio. thanks for watching and commenting.
I thought you were getting a little picky when using a counter weight on the level, I was surprised how much it made a difference. Great video and channel!
Interesting stuff. Liked the use of the level square and base with carbide feet to map it out. I am looking at that for the next 6ft straight edge I have to restore. Thanks for all your thoughts as you progress
All the best Mat
Great project Robin. I loved the phrase "topography of the plate" congers up mountains etc. Yer gonna have Popeye arms for sure after this project...
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Thanks once again for another very educational, interesting, and thoughtful video! I really appreciate your sharing your knowledge and thought process. I look forward to more lapping and the Renz-O-meter!
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Can't wait for part 2!
To do a differential compensation as accurately as possible, a weight moving towards each corner would work best. I know that’s a pain, but if the most accurate readings are wanted, each side, as well as the diagonal, should be taken into account, with diagonal corners having the largest droop.
Of course, the heavy cast iron plate sitting on the granite plate is influencing the readings more than the differential weight is, by an order of magnitude.
The truth is that the thickness of the plate is going to negate most of the effects anyway.
I’m pretty sure you’ll get this right even without the differential compensation.
Great video, I never get bored listening to your thought process. I’m going to be starting on my plate this week.
Rob.... Wow.... just wow.... Thank you. I'm hooked on this and look forward to seeing the subsequent vid's...!
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I was looking at that little weight he was using to balance the level, then back to the giant cast iron lap on the corner... I can only assume that there's no measurable flex in an 8" granite slab, and it's only in the platform? So the position of the lap will change the absolute position of the plate, but not the curvature. Since the measurement is all relative, the change caused by the fixed position of the lap doesn't show up? Now, the loading of the frame will cause it to respond differently to different minor changes. Going from 0 to 5 oz will likely make a bigger change than going from 1000 to 1005 ounces. Then again, the frame is already loaded with the enormous weight of a 1400 lb granite slab... It's fascinating to think through things at this level of precision.
i received some of that 40 microns diamond powder today, this is so fine there is no way to distinguish the grains by eyes. i was afraid this would be too fine for lapping, had to double check the ultimate source.
Robin, your technics are sound, you’re at the level of the pros that service my shop. And I’m not sure they’re pros...........................
I can't tell you how much I appreciate your work. Especially between your precision spindle video and this one, you've opened up a whole new world to me.
What really helps is your commentary and explanation.
Do you have a video about the machinists level frame? Even a retrospective would be helpful, or, what would be really grand would be for you to make a video building another one - a larger one, perhaps? Or a gift? Or a prize?
One more thing - please set up the RUclips "join" function. I would like the opportunity to set up monthly payments to compensate - at least on a token basis - you for how much you're teaching me. Likely there are others who feel the same way - your work is exceptional.
#EverythingIsRubber
Glad you like the content!
Hit the "show more" at the bottom of the video description and there are links to Patreon for setting up monthly donations or Paypal for one time donations.
I'd never fast forward one of your videos, sensei!
Looks very satisfying
It is! Thanks for watching and commenting.
You have great attitude to work. I wouldn't lap dry however and also using diamond powder is more or less unnecessary, cheap SiC or AlO2 will do just fine. I wouldn't overhang tool as much because it can turn the edge down, your tool is also quite small.
I guess you could use another granite surface plate as a hone, especially when coated with foil unless you want to want to resurface the hone. Reynolds makes a teflon coated foil if that is of any use.
I watched this clip several years ago and clicked like back then. It's a pity I can't add a like each time I watch it.
Thanks Rod, keep on learning so we can learn along with you.
This makes me look at my granite dough board in a new light.
And it's a great way to stay in shape.
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The heat from your hands might actually be helpful to combat the heat from the friction of lapping, although I suppose it's much less evenly distributed, and the sole of the plate expanding might already be counteracted by the tendency for the lap to go convex. So much to consider in a world where everything it so wiggly.
Nice job, ur technique is bang on. Beautiful plate.
Thanks!
Refinishing your surface plate appears to be a great way to true your straight edge(s) at the same time.
Excellent video! Can’t wait for the next one.
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From 29:00 and on ... pure facination. Thank you sir!