Thanks for the video. Getting close now. Making useful parts and chips. Almost like a real grown up machine. On to the chess pieces. Keep safe and stay well.
This week I bought a similar mini lathe. And now I have to go, I have a lot of work to do. I'm joking about the work, the lathe can wait a little. I've spent most of the day so far rewatching this series.
@@RotarySMP no, you don't. I've spent the rest of he afternoon lapping it. I don't have scraping tools or skills, so this won't be a fancy shit like yours, but it' so much fun.
Given the Mesa board you're running, any thought of getting some inexpensive TTL linear encoders on the x and z axes? Even the 5 um ones would give a lot of repeatability. Obviously some limit/home switches would be good, too. Great stuff, thanks for sharing.
I have thought about it, as a lathe uses so little of the 7i97 IO that I could confidur it for two more encoders. Realistically, I'll do that on a future machine. The Mini lathe is simply too compromised in it's basic design.
Really enjoying your documentation of this! A couple of things, soft limits (as others have pointed out) even if you don't have limit switches is a good thing. Second, if you knurl again with the scissor style tool you can get it just tight enough to knurl then back off in X to come off the part. Then you can knurl subsequent parts by advancing towards the part in X and you don't have to adjust them again. . Hope that makes sense. Looking forward to the rest of your conversion!
@@RotarySMP You bet. It's actually the way I do it when doing a small run manually. (Don't have a CNC lathe yet, but have 4 CNC mills, so it's overdue!) Makes it easy to get the depth you want as well. You can crank down on the screw with the rollers centered to get close, back off and tighten a little bit more, then you'll get a crisp deep knurl when you move the X back to center.
Well, thats why i was informed that i want closed stepper motors because then you will never lose steps. Thanks for showing me this. While it really helps out when you see a live example. Greetings, Jeff
I am not sure. Stalling at the end of X travel is not damaging. Limit switches on Z are pretty worthless, as the different lengths of Chucks, collets etc, and also the various position which the Tailstock can be located in make this challenging on a lathe. An X home switch would be nice.
Did you CAM the numbers separately, or have you got a serial-numbering routine? I wrote some G-code to do scale rings (XA moves) using internal routines for each digit, but the numbers are a but crude for this sort of scale, and I have a lot of Multifix holders that could do with numbers. I suppose having mentioned the routine, I might as well link to it: forum.linuxcnc.org/20-g-code/27169-g-code-to-engrave-numbers-on-cylinders
I've really been enjoying this series. Good job and thanks for uploading. That crash was painful to see. Hopefully it hasn't knocked the head stock or anything bad like that? Does your CNC have any feed override options?
@@RotarySMP I was cringing watching how close your knuckles appeared to be to the moving parts ... I suspect that occurred to you as a second or two later you changed to using pliers etc.
@@clasdauskas Sometimes the camera angle makes things look closer than the are, but generally the mini lathe requires you work pretty close to the chuck.
In the code make it so that when tool changing it goes to x home position something like G0 G53 X0 so it always goes to the same point. Only then you have to home the machine or add limit switches
Good point thanks. I sent it to the same point each time, but not absolute. I sent them to X40 Z40, but with that big tool offset on the knurl, did'nt make it.
In the code make it so that when tool changing it goes to x home position something like G0 G53 X0 so it always goes to the same point. Only then you have to home the machine or add limit switches
That is what I did. X40, Z40. Only problem was not checking if you could reach X40 with the tool offset for the knurl. I need to set up the soft limits. Luckily on this little machine, it just stalls at the hard limit.
Well yes it works with soft limits but is easiest with using a machine coordinate system like G53 or G28, look it up how to use them. Othervise great conversion.
@@jansaljaj3042 LinuxCNC can be programmed to go to a fixed machine coordinate position for tool change using TOOL_CHANGE_AT_G30 or TOOL_CHANGE_POSITION = possibly in conjunction with TOOL_CHANGE_QUILL_UP (which will do a Z retract before the move. Probably straight into the tailstock.
That crash had me saying some bad words,glad you were able to continue.
Yeah, not one of my finest moments. Thanks for the comment.
Thanks for the video. Getting close now. Making useful parts and chips. Almost like a real grown up machine. On to the chess pieces. Keep safe and stay well.
Thanks Colin. Sooner or later I'll run out of excuses for putting off the tailstock.
8:02 made me feel better about myself, i'm not the only one who does that.
I wish I'd learn to make a few less errors. Thanks for watching.
Nice work on the tool holders. Thanks for sharing.
Thanks for watching.
This week I bought a similar mini lathe. And now I have to go, I have a lot of work to do.
I'm joking about the work, the lathe can wait a little. I've spent most of the day so far rewatching this series.
Glad to keep you from polishing a turd :)
You buy a mini lathe to work on it, not with it.
@@phlodel That is about it. Think of it as a kitset model of a lathe.
@@RotarySMP no, you don't. I've spent the rest of he afternoon lapping it. I don't have scraping tools or skills, so this won't be a fancy shit like yours, but it' so much fun.
Lapping makes it feel a little smoother, but adds nothing to it's precision. It is just accelerated wear.
As machinists, we all are living in a zone between our last machine crash and our next machine crash : )
Thanks. I sure am.
Given the Mesa board you're running, any thought of getting some inexpensive TTL linear encoders on the x and z axes? Even the 5 um ones would give a lot of repeatability. Obviously some limit/home switches would be good, too. Great stuff, thanks for sharing.
I have thought about it, as a lathe uses so little of the 7i97 IO that I could confidur it for two more encoders. Realistically, I'll do that on a future machine. The Mini lathe is simply too compromised in it's basic design.
Really enjoying your documentation of this! A couple of things, soft limits (as others have pointed out) even if you don't have limit switches is a good thing. Second, if you knurl again with the scissor style tool you can get it just tight enough to knurl then back off in X to come off the part. Then you can knurl subsequent parts by advancing towards the part in X and you don't have to adjust them again. . Hope that makes sense. Looking forward to the rest of your conversion!
Thanks for pointing that out. I guess it makes sense that you can do that with a knurl. I just didn't consider it.
@@RotarySMP You bet. It's actually the way I do it when doing a small run manually. (Don't have a CNC lathe yet, but have 4 CNC mills, so it's overdue!) Makes it easy to get the depth you want as well. You can crank down on the screw with the rollers centered to get close, back off and tighten a little bit more, then you'll get a crisp deep knurl when you move the X back to center.
Well, thats why i was informed that i want closed stepper motors because then you will never lose steps. Thanks for showing me this. While it really helps out when you see a live example.
Greetings,
Jeff
Glad to assist.
1) Use thinner cutter for parting off
2) add plastic pipe for your lubricant
3) good job
Good advice. I have a 2mm carbide cut off tool, but with it's12mm shank I can't get it down onto center height. Thanks.
@@RotarySMP You can modify blueprint of "tool block for blades"
2:42 first the tap, then this... that's going to be your favorite tool holder I bet... lol poor #9
Yep, poor #9. We've been through a lot together.
@@RotarySMP 🤣
Nice job! I’ve really enjoyed this series!
Glad you are enjoying it.
are you going to see about limit switches to prevent your setup from crashing and losing steps?
I am not sure. Stalling at the end of X travel is not damaging. Limit switches on Z are pretty worthless, as the different lengths of Chucks, collets etc, and also the various position which the Tailstock can be located in make this challenging on a lathe. An X home switch would be nice.
Did you CAM the numbers separately, or have you got a serial-numbering routine?
I wrote some G-code to do scale rings (XA moves) using internal routines for each digit, but the numbers are a but crude for this sort of scale, and I have a lot of Multifix holders that could do with numbers. I suppose having mentioned the routine, I might as well link to it: forum.linuxcnc.org/20-g-code/27169-g-code-to-engrave-numbers-on-cylinders
Hi Andy,
Thanks for that link. I just set it up in my old copy of FeatureCam 2006, and changed the numbers and saved it 11 times. Primitive solution.
I've really been enjoying this series. Good job and thanks for uploading.
That crash was painful to see. Hopefully it hasn't knocked the head stock or anything bad like that? Does your CNC have any feed override options?
I does. Luckily this machine is so wimpy, that the steppers stall without generating enough force to dislodge the headstock.
@@RotarySMP Rethinking running it openloop?
@@clasdauskas Rethinking ownership!
I will sell the Minilathe as soon as the Schaublin can do threading.
Fantastic!
Thanks.
Hi,
The tool holders turned out very well... have you got another series planned to entertain us?
Take care
Paul,,
I still have a few more thinks to do on this machine. Tailstock, control panel etc. Thanks for watching.
Rotary, could you say what song was playing. And maybe we're to download. Thanks.
At which point in the video?
@@RotarySMP at 9:45 thanks so much.
Wish I would have seen your reply sooner. 🙄 I like all the music but the instrumental at 9:45 was so good. That guitar is just too good!
Very neat, thanks.
Thanks for watching.
Nice job
You sound australian but you Are from germany?
Neither, but close. :) NZer in Austria.
@@RotarySMP arhh. Right. 😁
Very Nice to see the lathe doing something usefull ahahha
Hi Andres. It certainly shows up the limitations of this design :)
👍👍😊👍👍
Glad you liked it.
I reckon the knurling tool needs a replacement top adjuster with suitable hex on the top ;-)
Or a big t-handle. The kurled nut is insufficient.
@@RotarySMP I was cringing watching how close your knuckles appeared to be to the moving parts ... I suspect that occurred to you as a second or two later you changed to using pliers etc.
@@clasdauskas Sometimes the camera angle makes things look closer than the are, but generally the mini lathe requires you work pretty close to the chuck.
In the code make it so that when tool changing it goes to x home position something like G0 G53 X0 so it always goes to the same point. Only then you have to home the machine or add limit switches
Good point thanks. I sent it to the same point each time, but not absolute. I sent them to X40 Z40, but with that big tool offset on the knurl, did'nt make it.
Soft limits!! Really. setup soft limits. (you do have home switches? I thought I remember that )
Nope so far neither. Didn't get to them yet.
First? :)
Yep.
@@RotarySMP wuhu!
@@surmetall5596 Thanks for watching.
@@RotarySMP thanks for making great videos! ;)
PS: we need more MAHO - ACTION :D
@@surmetall5596 Thanks. Noted :)
In the code make it so that when tool changing it goes to x home position something like G0 G53 X0 so it always goes to the same point. Only then you have to home the machine or add limit switches
That is what I did. X40, Z40. Only problem was not checking if you could reach X40 with the tool offset for the knurl. I need to set up the soft limits. Luckily on this little machine, it just stalls at the hard limit.
Well yes it works with soft limits but is easiest with using a machine coordinate system like G53 or G28, look it up how to use them. Othervise great conversion.
@@jansaljaj3042 LinuxCNC can be programmed to go to a fixed machine coordinate position for tool change using TOOL_CHANGE_AT_G30 or TOOL_CHANGE_POSITION = possibly in conjunction with TOOL_CHANGE_QUILL_UP (which will do a Z retract before the move. Probably straight into the tailstock.
@@andypughtube Thanks Andy, I need to put more time into learning these aspects of LinuxCNC.