Put my name on the list for lathe users

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Re: Put my name on the list for lathe users

Postby ger21 » Fri Oct 27, 2017 2:05 pm

That is unfortunately not a whole lot of business to dive into near future, not sure what their plans are after G41/G42 + motion planner review, they have other hardware mentioned too (updated MPG), but that may be a different team being hardware + not uccnc / motion controllers (API) direct programming, but it is also an untapped market for them.


I would hope that proper 4th rotary axis support is high on that list.
I know that the lack of rotary support is keeping many Mach3 users from switching to UCCNC.
I just attended the Vectric US User group meeting last week, and rotary is becoming quite popular.
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Re: Put my name on the list for lathe users

Postby cncdrive » Fri Oct 27, 2017 3:03 pm

Lathe control and rotary are different in my knowledge.
I think lathe needs radius based spindle speed control and rotary needs constant surface speed control which are totally different things as far as I understand.

How I think they are different is that with lathe the radius based spindle speed control is what is needed and how that works is that the spindle speed is automatically adjusted based on how far an axis is from the 0 coordinate. E.g. the Z axis distance from 0 sets a proportional spindle speed.
And the rotary to work optimally requires constant surface speed control where the feedrate needs to be compensated (again based on the radius or the Z distance from 0), just like if e.g. the A axis was an Y axis, I mean like if it was a XA plane instead of a XY where the A axis is rotating and the feedrate compensation changes as the Z axis moves closer and further the 0 coordinate.

Please correct me if I'm wrong.
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Re: Put my name on the list for lathe users

Postby markcadcam » Fri Oct 27, 2017 3:21 pm

You are correct except the (E.g. the Z axis distance from 0 sets a proportional spindle speed.) Should be the X axis.
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Re: Put my name on the list for lathe users

Postby cncdrive » Fri Oct 27, 2017 3:47 pm

Yes, really the cross axis is the usual radial axis on lathes, so yes, the spindle speed should then depend on the X axis distance from 0.
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Re: Put my name on the list for lathe users

Postby ger21 » Fri Oct 27, 2017 3:49 pm

Lathe control and rotary are different in my knowledge.


Yes, I didn't mean to imply that they were the same, or even similar.
Just saying that a lot of people would like to see rotary support. ;)
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Re: Put my name on the list for lathe users

Postby cncdrive » Fri Oct 27, 2017 3:56 pm

Sure, I just wanted to verify if my understanding is correct in case we will start implementing these then I will have to have a proper understanding.
But as mentioned previously I will probably start a forum thread before doing that where we could collect the informations so we could then have all the required knowledge to implement these properly.
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Re: Put my name on the list for lathe users

Postby Derek » Fri Oct 27, 2017 10:24 pm

I think if you had diameter mode and some sort of threading I could be doing a lot of parts. In my mind Mach turn wasn't exactly fully developed anyway.
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Re: Put my name on the list for lathe users

Postby Greolt » Fri Oct 27, 2017 11:55 pm

ger21 wrote:I would hope that proper 4th rotary axis support is high on that list.
I know that the lack of rotary support is keeping many Mach3 users from switching to UCCNC.
I just attended the Vectric US User group meeting last week, and rotary is becoming quite popular.


G93 would be a good start.
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