Spindle synchronized motion without starting the spindle

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06 Sep 2021 12:45 #219755 by anfänger
Hi, I have a question is it possible to use spindle synchronized motion without starting the spindle?
The reason is, I want to use it to tap internal threads by manually turning the chuck. 
Cause I am not sure if tapping would work wit the ramp of my spindle an so overshoot and crash the tap on the bottom of the hole. 

Thanks Patrick

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06 Sep 2021 13:07 #219756 by tommylight
I am pretty sure it is possible, seen someone on youtube doing just that, turning the chuck by hand and the rest of the machine following it.

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06 Sep 2021 14:16 #219761 by andypugh
Spindle-synch will refuse to start if the spindle is not on and set to non-zero speed.
So one work-around is to set the spindle-override to zero and then command a spindle speed / start.

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06 Sep 2021 14:23 #219762 by PCW

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06 Sep 2021 14:23 #219763 by anfänger
Thanks, I will give it a try

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06 Sep 2021 19:45 #219782 by anfänger


It works, now just a gcode to set the spindle override to 0 and back. I also tested the rigid tapping and even in low gear I overshoot 6 mm so for tapping I need to do it manually. Till I find another solution.
Many thanks for the help.

Cheers Patrick
The following user(s) said Thank You: tommylight

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12 Sep 2021 10:44 #220285 by andypugh

I also tested the rigid tapping and even in low gear I overshoot 6 mm

This might be something that you can configure in the spindle drive. A braking resistor might be needed. 

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