This video will teach you how to accurately locate your part when its in the vise at an angle. This technique is very helpful when an accurate location is required for a part feature.
Thanks for the thumbs up and down. If you leave a thumbs down, please also leave a comment on what you didn't agree with or didn't like. I am always willing to look at another way.
The people giving thumbs down, rarely ( most likely never speak out ) everyone of us get them, not to worry about unless there are more down than up... lol
Great video, thanks. Alternatively, instead of a drill blank use a square gauge block with knife edges. Use a shorter parallel so you can use the edge of the block to replace the rounded edge of your work, then use trig that you would have used if you had a knife edge on your work.
Always great circles Joe, we're you apprenticed to Giotto?:) [edit and by the way thanks for pointing out that "broken" edges aren't edges any more, once again, obvious when pointed out, but a pitfall I might have been caught by quite a fee times before I realised the source of error]
Kind of fascinating how all the theoretical geometry I learned as a young scholar and which I have rarely used now becomes very useful for practical stuff. It is so extraordinarily satisfying to work stuff out, apply it and find that it gives accurate practical results.
12/26/2021 I guess I'm a strange draftsman, I was an auto cad draftsman who was responsible for creating ALL the shop drawings for the machine shop, where I worked. I must be strange because I would use the computer, accurate to infinity, to place that correct dimension on the print, so the machinist didn't have to do all that math, and me too. Just like a good machinist, I learned tricks, shortcuts and the hidden ability's of the cad software. As Joe says, "there are at least 10 ways to do something, it's the same with a cad operation". Needless to say the operators, inspectors and MY boss. really liked me, for some strange reason Oh ya, the engineers would do the things you mention, but I tried to make sure it didn't matter. 5 minutes of my time saved double or more in the set up, production, and inspection time. I wonder if other guys, like me, did this or liked screwing with the operators? ;-)
I probably will need to watch this a couple of times, but I get the gist. We use calculators here ... so where could I get a copy of the Illinois(?) tables? I have a way of remembering Trig formula - I can remember Tan (opposite over adjacent), but can't remember which is sine and cosine, so I use a word analogy (nemonic?): Sine is oppoSite over hypotenuse, and cosine is adjaCent over hypotenuse for the angle in question.
you might want to add things like centerline, corner tick, and those little squares at the right angles to keep yourself and others straight on diagrams. make it more like a technical drawing
Thanks for your efforts. I agree with Mr. Getso's suggestion that you zoom in to the whiteboard after the introduction. Your efforts on the board are less then visible from the wide angle distance.
I do appreciate the feedback. I may try a different camera on the next video to see how that works. Most all of these have been shot with a gopro. Believe it or not, the camera is less than 3 feet from that board. I almost cant fit between the tripod and the wall. Its a super wide angle lens.
Hi Joe, Just found your channel. Ive really enjoyed the videos iv'e seen so far. I recently did a video on how I find a datum when doing something like this but at a compound angle. Here is a link ruclips.net/video/Gan_i2fXSmc/видео.html. Is this a method you use? Cheers, Crispin, UK.
Excellent use of trig for locating a feature. You're explanation was spot on except for calling the hypotenuse the "long leg." The "legs" form the right angle. Maybe start the video introduction with you as the main subject (as shown here), but zoom in to just the white board during the detailed explanation/sketching. Then zoom out for final thoughts/conclusion. If possible, wirelessly pause the Go-Pro when re-positioning camera tripod to avoid lengthy video editing in post production. Thoroughly enjoy the use of trig tables over punching buttons on a calculator. Unfortunately, "young" machinists, designers and engineers have never seen a trig table outside of a Half-Priced Books math/science section. I'm really enjoying the knowledge you share.
Richard, Thanks for the comments. I have just recently discovered how rare that book is that I suggest everyone gets. You can find them on EBAY if you get lucky. I usually shoot and post these videos in one day, solo. I have tried to avoid post production editing. These actually come right off the GoPro. ( not always on the first try ) I was wondering if someone would call me on the use of the term 'long leg'. Thanks for keeping me honest. I did not want to assume everyone knew what a hypotenuse was. Hopefully if they read this exchange..they will. Again, thanks for watching and your compliments and comments. Stay tuned. More to come.
Thank you Jim. I have several more trig and geometry based videos to post involving measuring angles on cut features. I appreciate the comment. If you have a suggestion, post it here. I'll see what I can do.
Great trick. I had to go out into the shop and draw this out with notes and added it to my "Trick Math" folder. Very simple and very elegant. Thanks and keep them coming.
I think I have this correct in a spreadsheet - since a lot of people have computers or even smart phones with spreadsheet apps. =(0.5*A2)*(1-SIN(RADIANS(B2))+COS(RADIANS(B2))) Where A2 is the diameter of the pin and B2 is the angle.
Noticed a couple of things in this six year old video. First, the sound quality in this room is much better. Second, a much more relaxed Joe. I like both. Thanks
smitty929929 Had some long absences from the trade myself, dont get discouraged by all the things you didnt know you could forget, it will come back and you can be better than you ever were before
Hey Joe, how about putting a Pac-Man shaped piece of material on the reference corner. Sandwich Pac-Man between your part and your stop. As long as your stop is a vertical plane that touches tangent to Pac-Man's outside diameter, you know your stop is offset "exactly" one radius from the corner. I'm probably describing an actual tool with an actual name that was invented in the 19th century, but I haven't seen one yet so that's my take on it. Well actually I got the idea from another video of yours showing how to use a ball or cylinder with a flat for holding rhombazoid shaped parts. I thought that was pretty clever. So I just wanted to return that clever idea back to you, slightly modified. Let us hope that we don't find too many holes drilled at odd angles on our prints, making occasions for using such a tool few and far between. I'm not much of a commenter because when I do I kind of ramble on and on as you may notice. So let me take this opportunity to say thank you for freely demonstrating your knowledge and experience to all of us hacks, essentially inviting us into your shop and showing us how you do what you do. I appreciate your hospitality Joe. Happy holidays!
I was an engineering apprentice 40+ years ago in the UK, then I left the industry for many years. I now make one off motorcycle parts on occasion, & I find your videos very informative with lots of tips & tricks that we weren't given or shown back then. These set up videos are particularly good, & you certainly have a better way of getting the information across than the grumpy buggers I had as instructors. Thank you, & keep 'em coming!
Hi Joe: Another awesome video, but you lost me after determining the length of the triangle legs in the pin. I am not sure how you proceed from there to the hole... Anyway, going to watch a few more times and maybe try it out to see if I can get it.
joe i'm trying to come up with cool nic name for ya first it was the pieman i did't like that one so than it was spiderman but that one is taken so than i thought joey p but that sounds mobbed up, so i guess i will go with Joe that's the one that i always go with. good video thanks.
I have been called Joe Pie since I was a kid. That's where all my teachers would stop during role call. As soon as they hit the c's and z's and such they stopped. So it was Joe Pie...............I'd just raise my hand. It stuck.
great demo joe. wold it also be possible to clamp a parallel across the part and flush with the top surface. use the sharp edge of the parallel to pick up the edge. i realize that the top surface of the parallel is on the hypotenuse and you would have to calculate the opposite side as a start point ? show us more
Hi Larry. I believe that would work. As long as you know how thick that parallel is and make sure its straight and flush with the part top, you could use an edge finder on the parallel then the trig deme to figure it out. You would still have to solve for 2 triangles, but its dealers choice here. On parts that are not tooling ball friendly, this is a good way to know where you are.
Ok I got the trig part how you used the bit or rod to form the values for your triangle. I get a bit lost when you say "just shift". Am I to understand that the value for the larger 20 degree triangle is already stipulated on our diagram and the distance that we calculated to the edge of the bit is to be subtracted from our edge finder then the mill moved the difference? Please keep in mind I am watching this at 3:30 in the morning with a bad case of heart burn. Thanks
At about the 8:45 mark I use the term shift. This is the distance you move your table once you have picked up the edge of the pin and zeroed your dials or digital. It is the distance from the edge of the pin to the corner you are trying to find.
Great video! I have question maybe you have a trick. I have to make a 23 hole pattern circle with holes drilled at a 7.27 degree angle in a cylinder shaped part.I am thinking of tilting the head and using a rotary table type indexer to do this. I wondering how to accurately locate the center of my part so I can make sure I create the correct PCD.
Have you watched the video on 'No Indexer, No Problem' Maybe that may help. As for finding center, you can indicate it or use an edge finder. How big is the cylinder?
It is a flange shaped part with the an OD of 150mm the PCD is at a diameter of 100mm with 23 holes that are drilled at a 7.27 degree toward the center of the part. It is 80 mm in length or height. Maybe i could use an edge finder on the OD if i touch exactly on the high, but I am unsure if it will be accurate. I don't think i will be able to sweep the part because the head will be tilted. i purchased a tooling ball with the hope of making a plug for the center of the rotary table that i will insert the tooling ball in and be able to sweep while the head is tilted. knowing the distance from the face of the rotary table to the center of the ball at given angle i can calculate the distance i need to move in x to be in center of the table. Then calculate the distance i need to move in x for the length of the part. lmao Idon't know its hard for me to picture any of this until i actually set up the part. maybe i'm just over thinking it...
Joe, I accidentally touched the thumbs down and couldn't figure out how to get rid of it. I hate these damn touch screens. I did go ahead and hit the thumbs up. Sorry about that. I loved this video.
At age 69 U now make me really regret why we did not pay more attention to our Maths at school. At that time who would have thought it was all "Applied Mathematics". It was never explained like that. And besides, we would not have been able to use it anyway, when we had "Job reservation" in those days. Oh well, that's all history now - and another subject at that !!! You have explained and solved the problem superbly. Thanks again Cap'n. ATB aRM
You made that harder than it had to be. The right half of the round moved along the line by it's radius. The left half of the round didn't move along the line as much because of the angle of the edge finder to the angle of the slope. If the angle was zero then it would have moved along the line by 100% of the radius. As the angle increases the movement along the line decreases. When something starts at 100% and goes down then you know to use the cosine of the angle, whereas when something starts at zero and moves up you go with the sine of the angle. Since this starts at 100% of the radius and is going down with the angle you use the cosine of the angle to find out how much it moved, which is less than 100%. Add that to the right half and you get the total movement along the line. So to do it quickly, it's the full radius on one side plus the cosine fraction of the radius on the other side.
OK....Here we go. If I understand you correctly, I may have to disagree. Your method would be quick and accurate if you were trying to find the linear distance between the contact point of the edge finder to the pin, to the contact point of the pin against the parallel as calculated between parallel vertical lines. I am having a hard time seeing how your method would give you the point on the part since the location parallel is a sloped surface. I am not disagreeing with you (yet) but I am having a hard time visualizing it. Please respond. I am intrigued.
OK. I took the time to evaluate every possible combination of values for this 20 degree triangle based on your comment. I like that. Its always good when someone makes a comment I have to dig into before I take a stand. Unfortunately, I have not been able to find that lower corner with less than 3 steps, so I have to disagree with your earlier comment. I am still looking forward to your sketch. Please still send it even if (when) you discover you are incorrect.
Joe Pieczynski, so you think I'm wrong? I find that pleasing. I have a saying that ensures I am right as much as possible: The only thing I hate worse than being wrong is staying wrong. (Someone should make that into a wall sign' for every shop.) Therefore when someone questions me they have my full and appreciated attention. I'll get something to you tonight. This morning I thought of another way to do it that might be easier to explain. Let's see.
I do believe you are wrong. I hope you find my challenge with the respect with which it is intended. I too have an uncanny knack for mechanical comprehension. I also have about 20 triangles on a sheet of paper right in front of me, and can't come up with that front corner using less than 3 numbers. I can find the pin contact point using your method, but not on the part. I anxiously await your reply.
Thanks for the thumbs up and down. If you leave a thumbs down, please also leave a comment on what you didn't agree with or didn't like. I am always willing to look at another way.
The people giving thumbs down, rarely ( most likely never speak out ) everyone of us get them, not to worry about unless there are more down than up... lol
Great video, thanks. Alternatively, instead of a drill blank use a square gauge block with knife edges. Use a shorter parallel so you can use the edge of the block to replace the rounded edge of your work, then use trig that you would have used if you had a knife edge on your work.
I questioned Joe's method. Joe's method is correct. I've got drawings and Excel to prove it.
Always great circles Joe, we're you apprenticed to Giotto?:) [edit and by the way thanks for pointing out that "broken" edges aren't edges any more, once again, obvious when pointed out, but a pitfall I might have been caught by quite a fee times before I realised the source of error]
I served my apprenticeship in Northern New Jersey in the watch industry in the late 70's. I built fixtures for second op processes. Super small work.
Kind of fascinating how all the theoretical geometry I learned as a young scholar and which I have rarely used now becomes very useful for practical stuff. It is so extraordinarily satisfying to work stuff out, apply it and find that it gives accurate practical results.
I loved geometry in school. Trig....not so much.
Wow. Stay in school kids.
12/26/2021
I guess I'm a strange draftsman, I was an auto cad draftsman who was responsible for creating ALL the shop drawings for the machine shop, where I worked.
I must be strange because I would use the computer, accurate to infinity, to place that correct dimension on the print, so the machinist didn't have to do all that math, and me too. Just like a good machinist, I learned tricks, shortcuts and the hidden ability's of the cad software. As Joe says, "there are at least 10 ways to do something, it's the same with a cad operation".
Needless to say the operators, inspectors and MY boss. really liked me, for some strange reason
Oh ya, the engineers would do the things you mention, but I tried to make sure it didn't matter. 5 minutes of my time saved double or more in the set up, production, and inspection time.
I wonder if other guys, like me, did this or liked screwing with the operators? ;-)
I probably will need to watch this a couple of times, but I get the gist. We use calculators here ... so where could I get a copy of the Illinois(?) tables? I have a way of remembering Trig formula - I can remember Tan (opposite over adjacent), but can't remember which is sine and cosine, so I use a word analogy (nemonic?):
Sine is oppoSite over hypotenuse, and cosine is adjaCent over hypotenuse for the angle in question.
you might want to add things like centerline, corner tick, and those little squares at the right angles to keep yourself and others straight on diagrams. make it more like a technical drawing
Awesome video Joe ! So after shifting over .1 for the edge finder you would shift X .970 ? Could you should how to layout the triangles for the Z ?
Thanks for your efforts. I agree with Mr. Getso's suggestion that you zoom in to the whiteboard after the introduction. Your efforts on the board are less then visible from the wide angle distance.
I do appreciate the feedback. I may try a different camera on the next video to see how that works. Most all of these have been shot with a gopro. Believe it or not, the camera is less than 3 feet from that board. I almost cant fit between the tripod and the wall. Its a super wide angle lens.
Hi Joe, Just found your channel. Ive really enjoyed the videos iv'e seen so far. I recently did a video on how I find a datum when doing something like this but at a compound angle. Here is a link ruclips.net/video/Gan_i2fXSmc/видео.html. Is this a method you use? Cheers, Crispin, UK.
Excellent use of trig for locating a feature. You're explanation was spot on except for calling the hypotenuse the "long leg." The "legs" form the right angle.
Maybe start the video introduction with you as the main subject (as shown here), but zoom in to just the white board during the detailed explanation/sketching. Then zoom out for final thoughts/conclusion. If possible, wirelessly pause the Go-Pro when re-positioning camera tripod to avoid lengthy video editing in post production.
Thoroughly enjoy the use of trig tables over punching buttons on a calculator. Unfortunately, "young" machinists, designers and engineers have never seen a trig table outside of a Half-Priced Books math/science section.
I'm really enjoying the knowledge you share.
Richard, Thanks for the comments. I have just recently discovered how rare that book is that I suggest everyone gets. You can find them on EBAY if you get lucky. I usually shoot and post these videos in one day, solo. I have tried to avoid post production editing. These actually come right off the GoPro. ( not always on the first try ) I was wondering if someone would call me on the use of the term 'long leg'. Thanks for keeping me honest. I did not want to assume everyone knew what a hypotenuse was. Hopefully if they read this exchange..they will. Again, thanks for watching and your compliments and comments. Stay tuned. More to come.
Interesting video. You should be more often watched and appreciated. Thanks for sharing.
Thank you Jim. I have several more trig and geometry based videos to post involving measuring angles on cut features. I appreciate the comment. If you have a suggestion, post it here. I'll see what I can do.
I use a jobber 6 calculator. It’s pretty dang good.
Great trick. I had to go out into the shop and draw this out with notes and added it to my "Trick Math" folder. Very simple and very elegant. Thanks and keep them coming.
Geometry and trig are very powerful tools for the machinist. Thanks for watching.
Holy Moely ,,, Its A Dam Fine Thing You Do !!!! I Love It All !!! In A One Out Ten This Vid Is A 12
Thank you very much.
Lol. Bad dream. U crack me up 😂
I think I have this correct in a spreadsheet - since a lot of people have computers or even smart phones with spreadsheet apps. =(0.5*A2)*(1-SIN(RADIANS(B2))+COS(RADIANS(B2))) Where A2 is the diameter of the pin and B2 is the angle.
Why would you have an untrue drill blank in your box. That belongs in the scrap bin.
They are not arr straight. True diameter maybe, but double check the straightness. I keep them around for tool bits.
High school kid: when will I ever use trig in the real world?
Joe: hold my beer kid
Thats how I felt about earth science.
Noticed a couple of things in this six year old video. First, the sound quality in this room is much better. Second, a much more relaxed Joe. I like both. Thanks
Puré gold this vid.
Very interesting video,Joe.Thank you.
Glad you enjoyed it
Great demo Joe!
Would like to see closer to the drawing, but understand the limitations... I’m out! Lol
Awesome video love your detailed approach, I always come back to rewatch these and refresh my trig and construction
You look at it you laugh an you wonder why you were afraid of it! Lol
Its nice to see it broken down into pieces. I think its easier to understand.
It cracked me up how you had to square up that drawing! I would have had to do the same. Also, why didn't I pay attention in math class! Thanks Joe
Yeah, those old GoPro cams were more GoSemiPro.
I now have a hero 7. I haven't learned how to use it yet. Very advanced from the 3.
Took a minute to wrap my head around this but i got it. Going back into the trade after a 15 year hiatus. Wish me luck...
smitty929929 Had some long absences from the trade myself, dont get discouraged by all the things you didnt know you could forget, it will come back and you can be better than you ever were before
@@Ihateutubecontextandsensorshit Thanks!
Enjoyed the lesson...thank you
Thanks for watching.
Thanks again for the knowledge share.
Hey Joe, how about putting a Pac-Man shaped piece of material on the reference corner. Sandwich Pac-Man between your part and your stop. As long as your stop is a vertical plane that touches tangent to Pac-Man's outside diameter, you know your stop is offset "exactly" one radius from the corner. I'm probably describing an actual tool with an actual name that was invented in the 19th century, but I haven't seen one yet so that's my take on it. Well actually I got the idea from another video of yours showing how to use a ball or cylinder with a flat for holding rhombazoid shaped parts. I thought that was pretty clever. So I just wanted to return that clever idea back to you, slightly modified. Let us hope that we don't find too many holes drilled at odd angles on our prints, making occasions for using such a tool few and far between. I'm not much of a commenter because when I do I kind of ramble on and on as you may notice. So let me take this opportunity to say thank you for freely demonstrating your knowledge and experience to all of us hacks, essentially inviting us into your shop and showing us how you do what you do. I appreciate your hospitality Joe. Happy holidays!
Pac man corner finders do exist. They are pretty cool. Happy Holidays to you as well. Thank you.
Can you please do a video with compound angles without a 4th or 5th axis? I really enjoy learning from you.
Same philosophy, just with multiple vises or a dual sine plate. having a reference target is very important. A tooling ball is a big help.
I was an engineering apprentice 40+ years ago in the UK, then I left the industry for many years. I now make one off motorcycle parts on occasion, & I find your videos very informative with lots of tips & tricks that we weren't given or shown back then.
These set up videos are particularly good, & you certainly have a better way of getting the information across than the grumpy buggers I had as instructors.
Thank you, & keep 'em coming!
Thanks. Some times I think being a grumpy bugger was once required to be a shop teacher.
Thanks for sharing, Joe!
I think I got it. Thanks for sharing
Hi Joe: Another awesome video, but you lost me after determining the length of the triangle legs in the pin. I am not sure how you proceed from there to the hole...
Anyway, going to watch a few more times and maybe try it out to see if I can get it.
This is one you may have to watch a few times. If you still can't see it, just ask.
joe i'm trying to come up with cool nic name for ya first it was the pieman i did't like that one so than it was spiderman but that one is taken so than i thought joey p but that sounds mobbed up, so i guess i will go with Joe that's the one that i always go with.
good video thanks.
I have been called Joe Pie since I was a kid. That's where all my teachers would stop during role call. As soon as they hit the c's and z's and such they stopped. So it was Joe Pie...............I'd just raise my hand. It stuck.
I know how to use trig on the level you are using in these videos but wow, applying it is whole different ballgame!
Unavoidable in a machine shop. You have to have the geometry down before the trig kicks in. Thanks for watching.
I am going to watch this one a few more times. Good videos Joe just about seen all of yours keep them coming!
Thanks Mike. there are lots of triangles going on here. It may take a while to set in. Good luck.
great demo joe. wold it also be possible to clamp a parallel across the part and flush with the top surface. use the sharp edge of the parallel to pick up the edge. i realize that the top surface of the parallel is on the hypotenuse and you would have to calculate the opposite side as a start point ? show us more
Hi Larry. I believe that would work. As long as you know how thick that parallel is and make sure its straight and flush with the part top, you could use an edge finder on the parallel then the trig deme to figure it out. You would still have to solve for 2 triangles, but its dealers choice here. On parts that are not tooling ball friendly, this is a good way to know where you are.
I agree with you totally Joe, yes I always had to work at the trig as a manual machinist, but with the charts etc I have always got it done.
Its a good root skill to have under your belt. Thanks for the comment Stephen.
Ok I got the trig part how you used the bit or rod to form the values for your triangle. I get a bit lost when you say "just shift". Am I to understand that the value for the larger 20 degree triangle is already stipulated on our diagram and the distance that we calculated to the edge of the bit is to be subtracted from our edge finder then the mill moved the difference? Please keep in mind I am watching this at 3:30 in the morning with a bad case of heart burn. Thanks
At about the 8:45 mark I use the term shift. This is the distance you move your table once you have picked up the edge of the pin and zeroed your dials or digital. It is the distance from the edge of the pin to the corner you are trying to find.
Thank you sir you are a scholar and a gentlemen
Great video! I have question maybe you have a trick. I have to make a 23 hole pattern circle with holes drilled at a 7.27 degree angle in a cylinder shaped part.I am thinking of tilting the head and using a rotary table type indexer to do this. I wondering how to accurately locate the center of my part so I can make sure I create the correct PCD.
Have you watched the video on 'No Indexer, No Problem' Maybe that may help. As for finding center, you can indicate it or use an edge finder. How big is the cylinder?
It is a flange shaped part with the an OD of 150mm the PCD is at a diameter of 100mm with 23 holes that are drilled at a 7.27 degree toward the center of the part. It is 80 mm in length or height. Maybe i could use an edge finder on the OD if i touch exactly on the high, but I am unsure if it will be accurate. I don't think i will be able to sweep the part because the head will be tilted. i purchased a tooling ball with the hope of making a plug for the center of the rotary table that i will insert the tooling ball in and be able to sweep while the head is tilted. knowing the distance from the face of the rotary table to the center of the ball at given angle i can calculate the distance i need to move in x to be in center of the table. Then calculate the distance i need to move in x for the length of the part. lmao Idon't know its hard for me to picture any of this until i actually set up the part. maybe i'm just over thinking it...
@@chrisn3794 how did it go? What'dchya end up doing?
Joe, I accidentally touched the thumbs down and couldn't figure out how to get rid of it. I hate these damn touch screens. I did go ahead and hit the thumbs up. Sorry about that. I loved this video.
Thanks Dale. This is a good technique to get comfortable with.
If you touch it again it will remove it...
spoiler alert! I can't stop touching it!
At age 69 U now make me really regret why we did not pay more attention to our Maths at school. At that time who would have thought it was all "Applied Mathematics". It was never explained like that. And besides, we would not have been able to use it anyway, when we had "Job reservation" in those days. Oh well, that's all history now - and another subject at that !!! You have explained and solved the problem superbly. Thanks again Cap'n.
ATB
aRM
You made that harder than it had to be. The right half of the round moved along the line by it's radius. The left half of the round didn't move along the line as much because of the angle of the edge finder to the angle of the slope. If the angle was zero then it would have moved along the line by 100% of the radius. As the angle increases the movement along the line decreases. When something starts at 100% and goes down then you know to use the cosine of the angle, whereas when something starts at zero and moves up you go with the sine of the angle. Since this starts at 100% of the radius and is going down with the angle you use the cosine of the angle to find out how much it moved, which is less than 100%. Add that to the right half and you get the total movement along the line. So to do it quickly, it's the full radius on one side plus the cosine fraction of the radius on the other side.
OK....Here we go. If I understand you correctly, I may have to disagree. Your method would be quick and accurate if you were trying to find the linear distance between the contact point of the edge finder to the pin, to the contact point of the pin against the parallel as calculated between parallel vertical lines. I am having a hard time seeing how your method would give you the point on the part since the location parallel is a sloped surface. I am not disagreeing with you (yet) but I am having a hard time visualizing it. Please respond. I am intrigued.
Joe Pieczynski I'll make a drawing and send it to you. I'm one of those people who just sort of "see" math.
OK. I took the time to evaluate every possible combination of values for this 20 degree triangle based on your comment. I like that. Its always good when someone makes a comment I have to dig into before I take a stand. Unfortunately, I have not been able to find that lower corner with less than 3 steps, so I have to disagree with your earlier comment. I am still looking forward to your sketch. Please still send it even if (when) you discover you are incorrect.
Joe Pieczynski, so you think I'm wrong? I find that pleasing. I have a saying that ensures I am right as much as possible: The only thing I hate worse than being wrong is staying wrong. (Someone should make that into a wall sign' for every shop.) Therefore when someone questions me they have my full and appreciated attention. I'll get something to you tonight. This morning I thought of another way to do it that might be easier to explain. Let's see.
I do believe you are wrong. I hope you find my challenge with the respect with which it is intended. I too have an uncanny knack for mechanical comprehension. I also have about 20 triangles on a sheet of paper right in front of me, and can't come up with that front corner using less than 3 numbers. I can find the pin contact point using your method, but not on the part. I anxiously await your reply.