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Post by librav on Feb 15, 2016 1:55:24 GMT
When my z-axis triggers the endstop, the led comes on, M119 shows it triggered but the stepper keeps turning. Wiring good, switch is good. Could this be a config.txt fault?
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Post by edinnh on Feb 15, 2016 2:38:18 GMT
Did you set alpha_limit_enable, beta_limit_enable, and gamma_limit_enable to true in the config file ?
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Post by librav on Feb 15, 2016 14:09:31 GMT
I had set gamma_limit_enable to true in the config file earlier. The limit switch does work correctly but no further motor movement is possible with the z axis.
In all the config.txt files I checked, they all keep this section commented out.
The answer must be in another section of the config.txt file.
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Post by edinnh on Feb 21, 2016 4:17:05 GMT
You are right. The documentation for smoothieware states: A reset will be required to continue, or sending M999, if that option is used the endstops will be disabled until the limit switch is released, make sure you jog away from the endstop though.
See: smoothieware.org/endstopsThe Gcode should send the M999 and send commands to move away from the endstop. The alternative from the same page in the smoothieware documentation: Retract After homing the axis is usually left triggering the endstop, this would prevent that axis from moving, so when limit switches are enabled after homing the axis will back off the endstop by the *.homing_retract_mm amount.
The downside is if you home to 0 and at 0 the endstop is triggered going to 0,0 will cause a limit switch to fire. The workaround is to set homing offset to -5 or enough to back off the endstop so when you go to 0,0 it does not trigger the endstop.
That way you can home, and safely go to 0 without triggering a limit switch event. An alternativve is to set min/max X/Y to -5 rather than 0.
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Post by jjlink on Feb 27, 2016 22:47:42 GMT
So on this printer which corner of the build plate is X=0,Y=0 ?
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Front left!
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