X Axis Limit Sensor

[bg1975]

I inadvertanlty left a clamp on top of my AR8 Pro today while I was cleaning up a little.  When I homed the machine the clamp got jammed up in and knocked the yellow travel limit sensor off location.  It is loose.  Not sure how to properly adjust it back to the correct location.




Any guidance would be greatly appreciated, I have several jobs in the works I need to get out.

[johnb]

Loosen the screws and move the limit sensor out of the way (no need to remove entirely)

Put your spoilboard fly cutter bit in the spindle and lower it to just above the table top
Jog the spindle to where the bit is just over the edge of the spoilboard
Eyeballing, set the limit sensor into place and tighten screws
Jog the spindle over a little and bring it back by again manually jogging
Adjust the limit sensor as needed to get the spindle to stop in the right place.
Once it does, you should be able to move the spindle out into the work area and then re-home it and it will end up in the right starting place.

The "maximum" X sensor on the gantry doesn't really do anything. If you notice, once you've reached the software limit of maximum X, the travel of the spindle stops before it reaches the limit sensor.
According to Chad, it's just there as a fail-safe to keep the spindle from crashing into the gantry arm if the software limit were to be "lost" or changed and the spindle "kept going".

[bg1975]

Thank you johnb. I did basically the same as your suggestion but just eyeballing the switch to the tab. Tightened everything down and re-homed. So far so good.