[stoneforth]

If you are able to turn the VFD Drive On / Off then you don't need the Relay

For frequency Parameter settings what have you already set as this is very important to get right before you run the spindle

I just shorted XGND to FWD on VFD to check if it starts, now i'm back to using VFD control panel until relay arrives.

Spindle RPM and the frequency display on VFD oscillates quite noticeably at what sounds like around 5-10hz when being controlled by mach3. At full speed it's stable and no oscillation.At this point i've given up on speed control through the software. I've got on/off control and fault estop setup which is fine. It would be nice to figure it out though

Voltage on controller reads a solid number from 0-10v output but it's like the VFD is seeing it as on and off. CHANGING PWM frequency in mach3 makes no difference.

When i probe the 5v pul terminal i can see pulsing on the multi-meter screen, but 0-10v is stable.

Do you know of parameters that could cause this

https://bulkman3d.com/wp-content/upl...ter-Manual.pdf

Parameters i changed are

P00.01 set to 1 to enable run commands?P07.08 set to 3 for frequency

Everything else was set according to how the manual suggests except for 'No.X paragraph frequency P07.00~P07.07'

mine go from 0-400 instead of 50hz to zero that the manual suggests so i left it

[mactec54]

I just shorted XGND to FWD on VFD to check if it starts, now i'm back to using VFD control panel until relay arrives.

Spindle RPM and the frequency display on VFD oscillates quite noticeably at what sounds like around 5-10hz when being controlled by mach3. At full speed it's stable and no oscillation.At this point i've given up on speed control through the software. I've got on/off control and fault estop setup which is fine. It would be nice to figure it out though

Voltage on controller reads a solid number from 0-10v output but it's like the VFD is seeing it as on and off. CHANGING PWM frequency in mach3 makes no difference.

When i probe the 5v pul terminal i can see pulsing on the multi-meter screen, but 0-10v is stable.

Do you know of parameters that could cause this

https://bulkman3d.com/wp-content/upl...ter-Manual.pdf

Parameters i changed are

P00.01 set to 1 to enable run commands?P07.08 set to 3 for frequency

Everything else was set according to how the manual suggests except for 'No.X paragraph frequency P07.00~P07.07'

mine go from 0-400 instead of 50hz to zero that the manual suggests so i left it

And what is the spindle motor you are running at 0-400Hz

[stoneforth]

And what is the spindle motor you are running at 0-400Hz

It's an ebay 2.2kw water cooled spindle. 220v

[mactec54]

It's an ebay 2.2kw water cooled spindle. 220v

You can not run or program these spindles having a 0 RPM this can damage these spindles

They have a minimum speed of 6000 RPM and must be programed correctly 100Hz = 6000RPM most use 120Hz for minimum speed

[stoneforth]

You can not run or program these spindles having a 0 RPM this can damage these spindles

They have a minimum speed of 6000 RPM and must be programed correctly 100Hz = 6000RPM most use 120Hz for minimum speed

Ok. I added some lower limits and set No.X paragraph frequency from 50-15hz like manual asks. All parameters are set how manual says now.

No improvement to oscillation problem from software speed control . I played with DIP switches and oscillation problem improves significantly with them all off but it's still doesn't sound good to me. Motor sound great when controlled by potentiometer so i'm happy to live without being able to control spindle speed via mach3.

In the future maybe i will attach a potentiometer to the rear like the manual shows and see if the problem is caused by VFD itself

Thanks for the help