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Mach4 General Discussion / Re: Mac4 VFD Spindle Speed Control Issue
« on: November 06, 2022, 06:50:54 PM »
Hi,
I presume, you don't say, that you are trying to control the VFD via an analogue PWM signal?
Have you programmed the VFD to respond to an analogue voltage input? If you have then you should be be to control the VFD by bridging it's 10VDC output
to its AVI input. That should cause it to run at full speed. If you use a variable resistor with the wiper attached to the AVI input you should have continuous
variable control from the minimum programmed speed of the VFD to the max programmed VFD speed.
If you cant control the VFD like this then there is no hope for the G540 to do so.
Craig
I presume, you don't say, that you are trying to control the VFD via an analogue PWM signal?
Have you programmed the VFD to respond to an analogue voltage input? If you have then you should be be to control the VFD by bridging it's 10VDC output
to its AVI input. That should cause it to run at full speed. If you use a variable resistor with the wiper attached to the AVI input you should have continuous
variable control from the minimum programmed speed of the VFD to the max programmed VFD speed.
If you cant control the VFD like this then there is no hope for the G540 to do so.
Craig