RE: [CAD_CAM_EDM_DRO] Help a confused newbie out please

I would expect that activating any one of the limit switches would
immediately remove steps from all of the motors without bothering about
accelerating down to zero. I would also expect that it might stop the
spindle as well.

As far as crushing the switch - you'd normally mount the switches in a
manner that the carriage can move past them without causing any damage. For
example, if you were sensing the position of the carriage, you would choose
a switch that had a ball-lever type actuator and mount the switch parallel
to the carriage so that the carriage could move across the ball (actuating
the switch) without damaging the switch itself.

You'd want to set the switches to trip so that there's enough distance
between the trigger point and the hard stop that any deceleration due to
inertia would not move the carriage into the hard stop position.

-- Jerry

|I am quite new to CNC and was curious if I wired switches at the
|limits of each axiis travel and have the software setup to ramp the
|acceleration up/down........Would the motors stop suddenly when the
|limit switch is activated and an Estop is instructed?
|Or would the motors ramp the motors down to a stop when the switch
|is hit, thus crushing the switch and possibly warping my new
|ballscrews or worse?
|What is the correct way of setting up limit switches?