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I recently installed a CNC control panel from a systems integrator. I added a momentary E-Stop button to the machine before the panel arrived. I
found that the panel had an E-Stop relay that picked up as soon as power is on, as long as none of the buttons were latched in. I am used to
magnetically held relays that need to be enabled with a pushbutton and sealed in with one of it's own contacts. I complained, but I heard the old
line of "that's how we always do it, and nobody ever complains".
I come from a large drive systems and special machines background. E-Stops were very important. The integrator indicated that digital servos and CNC controls are so reliable that a traditional "kill all power" estop is not needed for the drives. Is a simple E-Stop string that is not magnetically held acceptable in the machine tool industry? I want to know what's
accepted in the industry before I complain next time.
Thanks,
Bill Sturm
found that the panel had an E-Stop relay that picked up as soon as power is on, as long as none of the buttons were latched in. I am used to
magnetically held relays that need to be enabled with a pushbutton and sealed in with one of it's own contacts. I complained, but I heard the old
line of "that's how we always do it, and nobody ever complains".
I come from a large drive systems and special machines background. E-Stops were very important. The integrator indicated that digital servos and CNC controls are so reliable that a traditional "kill all power" estop is not needed for the drives. Is a simple E-Stop string that is not magnetically held acceptable in the machine tool industry? I want to know what's
accepted in the industry before I complain next time.
Thanks,
Bill Sturm