Jonathan

Thanks for doing that. not sure i got the answer i was hoping for :(

Basically I was hoping that applying dc to one coil of a stepper it would act as a brake. the lathe clearly has much more grunt so no braking effect was seen (frequency is near identical) and the output voltage from the second winding is essentially the same so isnt a measure of braking force.

i wonder if turning it by hand would empirically show the braking effect and maybe measure the effect using pulley and falling weight approach