No MSRB[0] fitted, as such, but...
The Frankenstein Switch can't be operated[1] under power, as VFDs Don't Like That, but there are *lots* of MSCD's (Magic Smoke Containment Devices) built in! e.g. magnetic circuit breaker on the power input, one for the spindle VFD, one for both work lamp and motor cooling fan, one for the control transformer, one for the suds VFD - then there are interlocks that (f'rinstance) won't let me power it up with forward or reverse engaged, multiple E-stop and (spindle & suds) power-off circuits...
I added a few convenience touches too, like the fan and lamp power (and DRO once it's cobbled together) staying on unless I hit the machine isolator, suds switching on with spindle rotation (when "enabled" with the push-button), remote switch for the lamp located up on the VFD remote head... I just don't know when to stop, sometimes
All in all, it seems to work how I'd want it to, even if it's a bit scruffy to look at!
Dave H. (the other one)
[ 0 ] Magic Smoke Release Button, of course!
[ 1 ] well, kinda can't - the motor's a constant-3HP, 3-speed, 3-phase pole-switching BTH about the size of a dustbin, and I'm told the induced voltage spikes could kill the VFD if I go changing windings at speed? Luckily the VFD gives enough speed control (20% - 150% of chart speeds) that along with the (roughly) 4:1 speed change on the clutch/brake box I can do most things without changing motor config - for instance, at the extremes it gives me 4.4 - 33 and 18 - 130 RPM in the lowest motor config and backgear, 75 - 550 and 300 - 2250 in highest config direct
It does lose a lot of power at low VFD frequencies, though, have to keep above 30Hz to the motor for heavy work
