Quick addition of 2.2kw spindle with VFD - Is this possible?

[Doddy]

The only point with the Spindle providing On/Off is the CW/CCW control - if you think you'll use reverse.

You could use the BoB spindle output - it's just another discrete output, but you'll lose the reversing option (assuming the SpindleV5 does 0-10 and separately CW/CCW depending on the DIR input).

[ngwagwa]

Don't expect to want reverse and using the BOB spindle output seems easier than trying to activate the Spindle V5 CW/CCW relays.

[ngwagwa]

Now I am confused. Pins 16 & 17 (spindle on/dir) go from BOB to spindle 5 board but it's the sprint that starts the spindle and I can't see how the sprint gets a signal to start the motor.

[Doddy]

My guess?, and it is a guess... the Sprint is configured such that a non-zero demand on the analogue input starts the spindle-motor. That short-cuts the need for a FOR/REV control.

Doesn't work for the Chinese VFD. You still need to source the spindle relay outputs through the BoB (and optionally through the Spindle V5) to the VFD

[Doddy]

Now I am confused. Pins 16 & 17 (spindle on/dir)

That's spindle PWM (or Step)/DIR, isn't it? Rather than a discrete ON(/OFF)

[ngwagwa]

Yes

[Doddy]

What's happening with Pin 5 of the Sprint controller?

[ngwagwa]

Com and run have just over 9 volts all the time