Quote Originally Posted by Doddy View Post
Really trying to help but there's not a lot to go on here.

Are you able to, or otherwise unable to open the enclosure for the VFD - there's more in that enclosure than just the VFD, but what is very important to the understanding of this is any interconnect from the internal (USB?) BoB and the VFD controller. That tells us if you have a Mach3-able solution or whether it's manual.

The "r00.0" display indicates it's trying to run, but with "zero" frequency of rotation. I'm hoping that you've tried twiddling the knob on the front and that does nothing?, Also the green and red buttons should start/stop - but possibly just alternate between "r00.0" and "0000" (or something). If the green/red buttons are completely non-responsive then this could be indicative of a Mach3 configuration - and all the more reason to open the box and get some photos.

What you're looking for are at least two signal wires from the BoB - for the Spindle On/Off, and the PWM spindle speed, along with likely a 0v/ground wire. If we know them, and where they are connected on the BoB then we can start to home on the Mach3 settings to give you spindle control.

If there's no wires from the BoB to the VFD, and you've tried the green/red/knob controls, then we need to look at the VFD set-up. But without a model number for the VFD we're guessing as to the parameter list, and the mechanism for changing parameter values. Without care you could end up damaging the VFD, spindle, or both.

We will/can help, but only if we can understand your set-up and equipment, without that - as CliveS says, it's crystal-ball territory.
Photos on the way