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

[ngwagwa]

That's right - the spindleV5 is controlling the speed but the on/off is controlled via the Sprint 400. Don't ask me why it was done that way.

Instead of getting the CW relay switch working would it not be easier to use the BOB spindle output?

micro bars as in ale houses?

EDIT: by the way putting the original spindle back on is looking less likely each day :)

[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?