Ballscrew articulation, has anybody had success?
- coaster
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26 Oct 2022 11:00 #255088
by coaster
Ballscrew articulation, has anybody had success? was created by coaster
Has anybody replicated a 'port block' style of milling machine?
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- tommylight
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26 Oct 2022 14:34 #255101
by tommylight
Replied by tommylight on topic Ballscrew articulation, has anybody had success?
More info?
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- cakeslob
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27 Oct 2022 03:18 #255161
by cakeslob
Replied by cakeslob on topic Ballscrew articulation, has anybody had success?
Didnt think they used this on cnc machines, but I guess you can get a whole 120 degrees outta it so not bad. I figured control would be something linear like (ballscrew travel/total degrees)/steps per mm
tommy, it looks like centroid has a 5 axis mill that uses linear ballscrews for rotary motion, like those fancy laser adjustment stages.
Thats if I understand it correctly. I havent seen any diy implementations before but my interest is piqued now.
tommy, it looks like centroid has a 5 axis mill that uses linear ballscrews for rotary motion, like those fancy laser adjustment stages.
Thats if I understand it correctly. I havent seen any diy implementations before but my interest is piqued now.
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- zack
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27 Oct 2022 07:35 #255169
by zack
Replied by zack on topic Ballscrew articulation, has anybody had success?
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27 Oct 2022 10:26 #255173
by tommylight
Replied by tommylight on topic Ballscrew articulation, has anybody had success?
Ok, that explains a lot.
A balscrew and some good bearings can get pretty good tolerances compared to cheap gearboxes, so that might be one of the reasons for using this.
A balscrew and some good bearings can get pretty good tolerances compared to cheap gearboxes, so that might be one of the reasons for using this.
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- andypugh
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27 Oct 2022 21:44 #255249
by andypugh
Replied by andypugh on topic Ballscrew articulation, has anybody had success?
It would need some maths in the kinematics file to convert linear motion to the final angle, but it seems simple enough.
I think this is cooler:
I think this is cooler:
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28 Oct 2022 23:34 #255357
by coaster
Replied by coaster on topic Ballscrew articulation, has anybody had success?
I have designed a few iterations, 8 degrees plus and minus (16 total) can be done with just ballscrew mapping on Mach3 using an 80mm water cooled spindle held in a pillow ball.
Bigger ambitions require more forethought.
Bigger ambitions require more forethought.
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28 Oct 2022 23:39 #255358
by andypugh
Replied by andypugh on topic Ballscrew articulation, has anybody had success?
That's a good point, ballscrew mapping would probably work for LinuxCNC too.
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