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Author Topic: Need help with spindle speed control.  (Read 2308 times)

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Need help with spindle speed control.
« on: April 20, 2011, 04:17:32 PM »
Ok i am doing a CNC conversion and also a motor swap/vfd install on my grizzly lathe. trying to test out the new motor with mach3. i have it hooked up to the VFD and it runs fine. i then wired up the vfd analog output from mach to the analog input on the vfd. i load mach3 with the gecko xml. switched the frequency control of the vfd to external input, not sure where to go from there to get it working.
Re: Need help with spindle speed control.
« Reply #1 on: April 20, 2011, 05:01:53 PM »
There's probably a parameter you will have to modify on the VFD.

Jeff
Re: Need help with spindle speed control.
« Reply #2 on: April 20, 2011, 05:22:51 PM »
I have, I set the frequency control to external input

Offline Hood

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Re: Need help with spindle speed control.
« Reply #3 on: April 20, 2011, 05:24:29 PM »
Have you measured the voltage coming out of the G540 to see if it varies with commanded speeds?
Hood
Re: Need help with spindle speed control.
« Reply #4 on: April 20, 2011, 07:53:27 PM »
i havent but i will give it a try.

but just some more info to make sure i am not stupid. as i said i am using a G540 which has three VFD terminals, i am using a teco vfd which also has three terminals for external control.

this is how i have it wired up....  please correct me if i am stupid at thinking this is how it would be hooked up.

G540-------------------VFD
VFD GND              common
VFD output           analog frequency signal input terminal
VFD +10VDC         10V terminal
Re: Need help with spindle speed control.
« Reply #5 on: April 20, 2011, 08:39:31 PM »
okay i got it to work, messing around with the settings it started to make it more clear how they worked. thanks, im sure you guys will be seeing me around more though asking lots of questions lol