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Author Topic: Variable speed controller with modbus communication for AC motor  (Read 11112 times)

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Offline mhickler

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Variable speed controller with modbus communication for AC motor
« on: October 22, 2007, 05:39:10 AM »
I am creating a specialized lathe running four steppers on two cross slides.I have an AC motor turning the lathe spindle that is hooked up to a variable speed controller, specifically a GS2 from Automation Direct. According to the specifications, this unit has "RS-232/485 Modbus communications up to 38.4 Kbps." Can I somehow use this feature so I can controll the spindle speed (via the controller and AC motor) from Mach software?
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Offline Peter Homann

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Re: Variable speed controller with modbus communication for AC motor
« Reply #1 on: October 22, 2007, 06:36:07 AM »
Hi,

Yes you can. If you set up the coms in Mach to suit your VFD, then write a macropump, it should work fine.

As I don't have a VFD, I haven't done it myself.

Cheers,

Peter.
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Offline Chaoticone

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Re: Variable speed controller with modbus communication for AC motor
« Reply #2 on: October 22, 2007, 11:42:45 AM »
Yup, Peter is right. Also, might want to look at Brains for setting it up.

Brett
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