Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: airbrush on May 26, 2015, 12:52:00 PM
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Hi,
I have limit switches on boths ends of all my axis. In my config currently I just have home set for them.
They are all wired in a normally closed setup. When I check the diagnostic screen all of my home switches are lit, triggering it turns off the light.
So does this mean I need turn them to active low...watched the video on home limits and none seem to be set active low...i guess it depends on your setup?
Triggering the switch currently does not trigger on Estop.
also i would like to set them be limit switches as well.
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settings were wrong...they were already set active low...unchecked now.
So i check all of the axis ++ and -- limits as well as home.
When I hit a limit switch and trigger and Estop it does not back off of the switch...should it??
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No, you have to jog it off the switch yourself. You need to turn on either manual override or automatic override before you can jog off the switch.
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okay..right. I've done that.
Just confused reading/watching all of the home and limit stuff. As it mentioned when homing it hits a switch and then backs off, so i wasn't sure if this was expected behavior for limits as well.
Switches are all set up now, will have to try homing next.
thx
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Hitting a limit during operation says something bad just happened, so don't try moving anything. So you have to override the E-stop function and take responsibility for jogging in the correct way to clear the problem. Note that after an E-stop Mach 3 no longer knows where it is. So you must reestablish your X0,Y0,Z0 positions.
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got it...hitting limits is bad :)
so when you hit a limit mach gets rid of your zero you set?? why would it do that?
How would you restart your cut if you hit a limit??
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so when you hit a limit mach gets rid of your zero you set?? why would it do that?
Because a limit switch is an emergency stop, and Mach3 will instantly stop sending steps, which causes the motor to lose position, as it doesn't decelerate properly.
How you restart depends on how you started in the first place.
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okay..thx...one step at time. I'm sure more will become clear later