1 Topic by NicoleJS (edited by NicoleJS 2021-08-25 04:20:52)

  • NicoleJS
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Topic: Control board ignores x axis limit switch

This one has me stumped. Can't even figure out how to troubleshoot this.

Machine is a zonestar - Prusa clone. Machine was working fine, but the print lost adherence to the board so I stopped the print using the 'stop print' option under the SD card menu.

When I restarted the machine, it started normally, with a normal display. The bed and head temperatures came up normally. But when the machine zeroed all its axes, it failed to stop on the x axis, continuing to grind away at the belt until I pulled the plug.

I confirmed the behavior - it'll do it every time. I reset the board using the on-board reset switch, but that had no effect. I checked the switch with an ohm meter, and it's working correctly. I checked the carriage travel, and the switch does indeed trigger when the carriage reaches the stop. I homed the y and z axes through software, and they both homed normally and stopped. But when I tried to home the x axis through software, it ignored the limit switch and continued to grind away until I pulled the plug.

Basically, the board isn't paying attention to the X axis limit switch.
Phone Ringtone

Anybody got any ideas?

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2 Reply by justsomeguy

  • justsomeguy
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Re: Control board ignores x axis limit switch

There is an M code I think that will return the status of the limit switches. If you run the code with the switch open and closed, that will tell you if the firmware is reading its state properly. That's where I would start.

3 Reply by Kronikabuse

  • Kronikabuse
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Re: Control board ignores x axis limit switch

M119 shows endstop status

Sd4 #9080 with a glass bed. E3d chimera duel extruder. Paste extruder , duet wifi.
Lawsy carriages. linear bearings. Y axis direct drive, Kinect scanner
SD4#8188 glass bed, lawsly carriages, E3d v6, octoprint http://www.ustream.tv/channel/hotrod96z28
Filastruder/filawinder, Custom Delta 300mm x 600mm