BuildersBot: CNC Router that can also 3D print. June 17, 2014 09:00AM |
Registered: 10 years ago Posts: 1,381 |
Re: BuildersBot: CNC Router that can also 3D print. June 17, 2014 09:30AM |
Registered: 10 years ago Posts: 790 |
Re: BuildersBot: CNC Router that can also 3D print. June 17, 2014 10:40AM |
Registered: 11 years ago Posts: 564 |
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MrDoctorDIV
In my experience, I like 16th step microstepping. It's been a sweet spot for me. On my Z axis I use 4th stepping. All stepping is solid and as cheap as my motors are I haven't had a stepping related problem.
I can say however that slight ridging is apparent as the motors pass each poll, and I have yet to come accross a machine that does not have this, industrial or otherwise. I wonder what gearing over stepping would do to get rid of the ridges. Personally, with the teeth of gears I think ups and downs in speed would still be there, but that's dependant upon the gearing and tolerances of such. Just some thoughts. I might play with stepping again to see what results I get.
Re: BuildersBot: CNC Router that can also 3D print. June 18, 2014 06:11AM |
Registered: 10 years ago Posts: 1,381 |
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Fabricate
I heard once that using a dual motor setup for one axis and microstepping is not a good idea, but I am not sure if this is also true for a dual motor + dual driver setup. Read more about this issue here.
[forums.reprap.org]
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woo
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woo
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Vince
My mendel has two z motors and they somehow seem to get out of step quite regularly, fortunately not during a print, just between. I was determined to lock these new ones together and reduce the hassle.
I was thinking of using the 8825s for drive but will take a look at Core, thanks.
classic reprap mistake. set Z axis to full step and its solved.
its logical explanation. everybody sets two motors on same driver, and turn on microsteps. when you stop printing, your motors are shutting down, and they stay on "microstep" position.
when you turn on printer again, and motors are on some microstep position, they jump to full step position, and there is possibility that each motor jump on different side.
just change to full step and it will be ok.
[forums.reprap.org]
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misan
In microstepping you cannot de-energize the motors as they cannot hold statically any other than full step positions. You can configure your firmware to not put driver to sleep mode on Z axis. My advice is to keep all the axis energized if your are using microstepping on them.
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Re: BuildersBot: CNC Router that can also 3D print. June 18, 2014 09:09AM |
Registered: 10 years ago Posts: 790 |