Axis Limits Override

[gharbarka]

Hi. I am an infrequent user of CNC. My system was built around grblHAL and iosender. My hardware is built around a BSCMCEO4U board and 3 wire inductive proximity switches for X,Y,Z limit sensing.

In the beginning, when one of the limits was triggered I was constrained to turn off the power to the motors, move that axis by hand until the switch was deactivated. Then put power back on and continue.

Later I put a "normally on" push button in series with all the supplies of the sensors to disable them temporarily, which then allowed me to use the jogging buttons carefully to move away from the limit. This works well.

Recently whilst carrying out a software upgrade to grblHAL I noted that in the "optional inputs" tab, one can tick the "limits override" option. I tried to look for some wiki for this option in the hope that I could do away with my push button but could not find any related info.

Can anyone help?

Thanks

[terjeio]

The "limits override" input is for connecting the button to the MCU (Pin8/PB3 in the 10pin IDC connector) instead of cutting power to the switches. If you have homing enabled you can also rehome to move off the limit switches.

[gharbarka]

Thank you I will try both methods.

More importantly for me, where would I look for this sort of info in the wiki instead of having to bother you lot and maybe prevent you from tackling more important issues?