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Topics - Fogl

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General Mach Discussion / Mach3 + G540 + VFD(s) + spindle
« on: September 21, 2012, 01:46:23 PM »
Ok, I'm trying to get my VFD to be hooked up on the G540, all driven by Mach3. So far I had no success doing so.

This is my setup:
1) I used "default" G540 XML configuration file which can be downloaded for G540. I was ensured bu many G540 users and Geckodrive support, that it should be ok.
2) I have G540 hooked up on VFD, (3 cables: +10V, 0-10V signal, COM)
3) I have VFD jumpered so it should go always forward (just for now) so I do not need relays for now.
4) I have spindle configured to be driven by PWM 50Hz, min 5%
5) I set up pulley with ratio 1:1 and max RPM 24000.
6) Spindle motor tuning: here is a first hicup. I have no idea, how to map steps, velocity and acceleration on spindle. It makes perfect sense for stepperes, not so for spindles.
7) When I try to punch speed into spindle and do CWF5, I see nothing. RPM says 0. Mach3 from some reason does not want to start spindle.
8) Funny is, when I check "average spindle speed" in spindle settings and then punch CWF5, RPM jumps to 24000 and then quickly ramps down to 0.  ???

When I measure +10V on Gecko, it really says +10V, when I measure 0-10V signal, it always shows 0.48V, which is pretty much 5% duty cycle.
So what am I doing wrong? What am I missing?

Thanks a lot for help.

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