DIY spindle stall monitor

[routercnc]

I've been wanting to do this project for a while. I wondered if it would be possible to build a spindle monitor to check if it has stalled out and then e-stop. Hopefully this would stop it breaking end mills. Sounds easy in principle . . .

[EddyCurrent]

I would exxpect the VFD to have a motor stall function in it's parameters, the ABB one I use certainly has although I have not tested it in practice.

[routercnc]

Maybe but I've not found it in the 'documentation'. Would simplify things if it did.

[routercnc]

Episode 2, just making it better all round . . .

[EddyCurrent]

These inverter parameters look interesting;
PD118, PD119, PD120, PD121, PD122, PD123, PD124, PD125

[routercnc]

These inverter parameters look interesting;
PD118, PD119, PD120, PD121, PD122, PD123, PD124, PD125

Reading them now. Looks interesting! Worth experimenting with to see if it really can detect a stall through current monitoring and then trip the onboard relay (although I think that is omitted on my model, although I might be mixing it up with the inverter inspection I did for the drill press project)
External current monitoring did not seem to show much but maybe internally it is reading a different part of the circuit.

Might turn out to be the biggest waste of time project (except for the fun and learning)

[routercnc]

I decided to look into the inverter parameters . . .

[routercnc]

Prototype PCB!

[routercnc]

More developments, some hardware but mostly software including storing user values in non-volatile memory. Also a look ahead to the next PCB revision . . .

[routercnc]

New PCB boards to split the LCD display and the processor. Went smoothly apart from the bits that didn't.