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Author Topic: Mach3 - motorised knife as A axis  (Read 867 times)
dh42
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« on: April 24, 2019, 01:08:58 am »

Hello

I just make some experiments (simulation) to drive a motorized knife on A axis with Mach3.

Seems to works with a basic engraving GCode made with Cambam, except that the management of arcs is buggy so a post processor with "convert to line" enabled is required (the same as for Wrapper)

Settings:
in the setting panel
- enable tangential control
- give a value for "lift angle" (perform a Z move then rotate the knife if angle is larger than the given value)
- give a value for "lift Z" (= relative Z clearance from the actual position)
- set rotation radius to 0 for A axis.

Ports&pins > motor output
- enable A axis

config > toolpath
- disable "A rotation enabled" (if not, the display will be wrong)
- enable "Use rotation for radius"

On the video, the speed is lower in the arc, it's because my settings stays the same as for my "real" 4 axis that run at 7 RPM max ... it rotate too slowly to achieve the feedrate requested ...

http://www.screencast.com/t/HwxonBGXE

++
David
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Bob La Londe
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« Reply #1 on: April 25, 2019, 19:11:09 pm »

Nice.  I would love to see it in operation on the machine. 
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dh42
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« Reply #2 on: April 26, 2019, 20:36:58 pm »

Hello

I don't have one !

It's just curiosity ; I fell on a "tangential control" button on Mach3 and I was wondering what it can be ...  so I did some search and experiments Grin

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David
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Bubba
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« Reply #3 on: April 26, 2019, 21:46:15 pm »

I wish I could see the screencast without installing flash.. That is no go for me.
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