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Working XYZA positional 4th axis system: how to modify to make A a velocity axis
7 years 9 months ago #124361
by pl7i92
Replied by pl7i92 on topic Working XYZA positional 4th axis system: how to modify to make A a velocity axis
can you make a example on how this woudt work
switching by button between A RotaTION axis
and A Spindel
switching by button between A RotaTION axis
and A Spindel
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7 years 9 months ago #124362
by andypugh
Replied by andypugh on topic Working XYZA positional 4th axis system: how to modify to make A a velocity axis
wiki.linuxcnc.org/cgi-bin/wiki.pl?SpindleOrient
Is one way (it uses M19, but using an A axis instead to allow coordinated movement is a fairly small change, you would still use the orient component for the rounding, but drive it from axis.a rather than spindle.orient.angle
Is one way (it uses M19, but using an A axis instead to allow coordinated movement is a fairly small change, you would still use the orient component for the rounding, but drive it from axis.a rather than spindle.orient.angle
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7 years 9 months ago #124619
by clunc
I didn't care for the idea either, considering it akin to "poking false memories into linuxcnc's living, real-time brain" and thus a kind of ad hoc brain surgery, but this approach had the advantage, slim though it was, that I could follow it, if just barely.
"PID controllers in the HAL layer" adds one abstraction level too many for me.
I redd everything I found about HAL, and kept the references open while experimenting, but still just-don't-grasp.
I need a coloring-book version.
And like the 16-colors-in-a-box type.
Replied by clunc on topic Working XYZA positional 4th axis system: how to modify to make A a velocity axis
andypugh wrote: I will also add that, personally, I don't really like linking and unlinking pins in HAL to switch between modes. I much prefer the approach of switching between two separate PID controllers in the HAL layer.
I didn't care for the idea either, considering it akin to "poking false memories into linuxcnc's living, real-time brain" and thus a kind of ad hoc brain surgery, but this approach had the advantage, slim though it was, that I could follow it, if just barely.
"PID controllers in the HAL layer" adds one abstraction level too many for me.
I redd everything I found about HAL, and kept the references open while experimenting, but still just-don't-grasp.
I need a coloring-book version.
And like the 16-colors-in-a-box type.
Please Log in to join the conversation.
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