Mach3 and VFD Wiring

[JAZZCNC]

Ok well there are two parts to this. Speed control and ON/OFF operation of the VFD.
On/OFF is easy enough and like you seen it's done using a Relay.

Controlling the speed needs 0-10v signal which is sent to the VFD.

Unfortunatly the DB25-1205 isn't much good for either of these.? It doesn't have 0-10v speed control and it doesn't have built in relay.
So this means you'll need separate Analog or PWM Speed control board which gives you 0-10V signal.

ON/OFF can be done using external Relay using one of the Outputs to control it. However you'll need to make sure the coil of relay used doesn't pull more current than the OUTPUT can provide. The BOB manual should tell you this Info.

Also be aware some external spindle boards will use up one of your Axis.