Making DIY Lathe
- ML
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25 Feb 2023 07:46 #265307
by ML
Making DIY Lathe was created by ML
Hi guys) Not far away I made Plasma cutting table powered by PlasmaC LinuxCNC and Mesa 7i96 card. Now I m thinking why not to make lathe using LinuxCNC.
Please give me an advice or your opinion about following. Is that good for using in making lathe:
- Mesa card 7i96S
- 3 phase asynchronous engine 3000 Watt and 3000 rpm
And questions:
- does LinuxCNC have some special update for lathe (such as PlasmaC for plasma table)
- how control spins of engine for synchronizing with other movings.
Thanks)
Please give me an advice or your opinion about following. Is that good for using in making lathe:
- Mesa card 7i96S
- 3 phase asynchronous engine 3000 Watt and 3000 rpm
And questions:
- does LinuxCNC have some special update for lathe (such as PlasmaC for plasma table)
- how control spins of engine for synchronizing with other movings.
Thanks)
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- andypugh
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25 Feb 2023 13:25 #265327
by andypugh
Replied by andypugh on topic Making DIY Lathe
Do you mean making a lathe from scratch? I really wouldn't bother, as starting with an actual lathe is likely to be easier and give a better end-result.
Lathes are typically easier to convert to CNC than mills, as long as you can find one with space for a ballnut in the cross slide. (though, actually, the nature of lathe operations means that backlash compensation works OK and you can stick with the original screws (up to a point)
Most of the LinuxCNC GUIs have a "lathe" mode.
You might also want to look at:
forum.linuxcnc.org/41-guis/26550-lathe-macros?start=240#247195
Lathes are typically easier to convert to CNC than mills, as long as you can find one with space for a ballnut in the cross slide. (though, actually, the nature of lathe operations means that backlash compensation works OK and you can stick with the original screws (up to a point)
Most of the LinuxCNC GUIs have a "lathe" mode.
You might also want to look at:
forum.linuxcnc.org/41-guis/26550-lathe-macros?start=240#247195
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26 Feb 2023 07:35 #265390
by ML
Replied by ML on topic Making DIY Lathe
Thanks, lathe macros topic is very useful.
I also think about updating existing lathe to CNC, but it seems to me that much cheaper to make it from scratch . Moreover almost all used lathes have backlashes and railing accuracy lower for example than new sbr or hiwin.
I also think about updating existing lathe to CNC, but it seems to me that much cheaper to make it from scratch . Moreover almost all used lathes have backlashes and railing accuracy lower for example than new sbr or hiwin.
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27 Feb 2023 00:11 #265455
by andypugh
Replied by andypugh on topic Making DIY Lathe
I have wondered whether a "gantry" lathe would work well. ie use two ballscrews, one each side of the bed, for Z to hold the X at right angles, rather than relying on a long slide.
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27 Feb 2023 06:26 #265485
by ML
Replied by ML on topic Making DIY Lathe
I found nice solution:
User GBWM , seems to me, made a good job. How do you think?
I just need to know if it’s good and:
- 7i96s card is good for lathe
- how control asynchronous engine spins
- updates for linuxcnc special for lathe (that point, I think, you already clarified with macro’s recommendations
User GBWM , seems to me, made a good job. How do you think?
I just need to know if it’s good and:
- 7i96s card is good for lathe
- how control asynchronous engine spins
- updates for linuxcnc special for lathe (that point, I think, you already clarified with macro’s recommendations
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27 Feb 2023 08:31 #265488
by andypugh
Replied by andypugh on topic Making DIY Lathe
I think that it may be too early to worry about the CNC control side of things.
What you need will be determined by the hardware.
For example, with my milling machine retrofit I found a cheap set of 4 servo motors, but they had resolvers, so needed compatible drives and a controller card set that could work with resolvers.
If you are using stepper motors then almost anything can be used. My first conversion used the parallel port and worked fine for a couple of years until I felt the need for more input channels.
What you need will be determined by the hardware.
For example, with my milling machine retrofit I found a cheap set of 4 servo motors, but they had resolvers, so needed compatible drives and a controller card set that could work with resolvers.
If you are using stepper motors then almost anything can be used. My first conversion used the parallel port and worked fine for a couple of years until I felt the need for more input channels.
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27 Feb 2023 08:36 #265489
by ML
Replied by ML on topic Making DIY Lathe
yes, stepper motors will be used.
Thanks for your time) I will post here what I will have in result)
Thanks for your time) I will post here what I will have in result)
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27 Feb 2023 08:43 #265490
by andypugh
Replied by andypugh on topic Making DIY Lathe
One mechanical design tip: Make the Z screw longer than needed to leave space for ball screw covers.
My own lathe retrofit has space inside one of the castings for a spring-type cover:
photos.app.goo.gl/XEpzLSgGRyKf6oDZA
photos.app.goo.gl/2EKJHW6afxtkRjSj6
You might find the whole story worth reading?
bodgesoc.blogspot.com/2015/08/holbrook1.html
(9 sections, index top right)
My own lathe retrofit has space inside one of the castings for a spring-type cover:
photos.app.goo.gl/XEpzLSgGRyKf6oDZA
photos.app.goo.gl/2EKJHW6afxtkRjSj6
You might find the whole story worth reading?
bodgesoc.blogspot.com/2015/08/holbrook1.html
(9 sections, index top right)
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