Braking resistor calculations...

[A_Camera]

I have no idea of what a 775 motor is but I wouldn't just short the leads. Anyway, do you have to stop it so often that it is a problem? In any case, the motor spinning at that rpm generates a lot of electric energy.

[Dodgy Geezer]

I have no idea of what a 775 motor is but I wouldn't just short the leads. Anyway, do you have to stop it so often that it is a problem? In any case, the motor spinning at that rpm generates a lot of electric energy.

It's not for general use, but for the emergency stop. I was not impressed by the time this larger motor took to spool down, compared to the little toy I was using earlier.

A775 is still in the 'toy' range for real spindle use, but it's a bit larger - see https://www.ebay.co.uk/itm/393219444...SABEgIbnPD_BwE

And so the question of what value for a braking resistor is still a valid one...