jim rozen wrote:
In article , Eric R Snow
says...

Now's the time to consider a 3 phase motor and a foot brake

If he has three phase, then he doesn't really need the foot brake.

It's a snap to plug reverse the motor to a dead stop, or better
yet throw it over into reverse as the tool is backed out, to
bring it away from the shoulder.

Jim

If the thread is a short one consider setting up a hand-crank for the lathe.
If this is not possible/practical you will have to anticipate how long the
lathe will coast after power is turned off and 'pull the plug' in advance.
As the machine is slowing down have your hand on the cross slide ready to
rapidly back it off at the right moment.
Then reverse the lathe back to your starting point.
Be sure to have all the lash on the correct side of the tool before starting
into the cut.
Takes some practice and will supply a few moments of high drama but it gets
easy.

Ken.