I’ve “upgraded” to a 110v 1.5kw water cooled spindle with huanyang vfd. I’ve wired it as follows.
Longboard (LB) SpinPWM to VFD VI
LB SpinGND to VFD ACM bridged to DCM
LB SpinDir to VFD FOR
I’ve changed the jumper and pd settings in the VFD to what was recommended in the VFD wiring post found here. I’ve changed the LB max spindle speed parameter to 24k. I can verify that the M3 Sxxxxx commands result in 5v coming from SpinDIR and appropriately prorated voltage from SpinPWM. The spindle was working in manual mode before attempting to connect to LB.