Re: Z axis has a brake - adding a limit switch to activate the brake
If I understand correctly, I think there is a small flaw in your control logic. You would have to have some way of overriding the limit switch in normal operation. If you just put the limit switch in series with the brake, then the brake would apply anytime the limit was triggered.
You really need to use the servo enabled/OK output from the servo drive, and use that to energize a relay that will allow the brake release.
Jim Dawson
Sandy, Oregon, USA