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Why worry about the spindle stopping, I thought that the problem was the use of high torque? motor driving the leadscrew. A limit switch will stop that. Be aware that it is not good policy the have a high deceleration rate on a spindle with a screw on chuck!
I need to say that I have had an ELS for quite a few years and have never crashed it yet!
Richard

On 24/09/2020 14:05, Ralph Hulslander wrote:

Interesting thanks, I only bought the motor because of the sale.

I "plan" on having travel stops, but do not know how to get my spindle to fast stop.

I use the and there is very little known about the controller.

I am currently?using a 10 k pot in place of the Hall Effect foot pedal and when I turn the pot down there appears that there might be braking

involved. If I just turn the power off the motor continues to? rotate.

Ralph

On Thu, Sep 24, 2020 at 7:26 AM Bob T <zs6bxi@...> wrote:

Ralph 12 Nm is a beast if you run it at its rated current. I have one on my mill and managed to shear a drive key using the stepper at full rated current. Fortunately the stepper drive has lower current settings.....its on about half rated current now.
Don’t (how do I know ? ) use it at full current with out a trip switch to prevent end stop crashes.

By the way with Lindo’s corollary.....tools are not the only things cats make off with ! interesting curls of steel and aluminium also walk too. And they end up in funny and not so funny places....a freshly made bed ?
And of course O’flanagan held that Murphy was an optimist.

Regards ?Bob

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Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer