On 04/09/2019 08:31 PM, Gene Heskett wrote:
Greetings all;

out of the logic that determines whether the machine will run gcode when
that A axis has not been homed because its unplugged, off the machine
and stored and either is unhomed, or was never homed since this power
up.
How is this best done? Preferably done so that a powerdown to switch its
homing on or off, won't disturb LCNC's ability to run gcode just because
the A isn't homed??


Well, there usually is not a huge reason to have home switches on a rotary axis, unless you have setups that will be reused on following days. So, you can set the A to home wherever it is (search and latch velocity of zero). Ground encoder inputs with a shorting plug, so noise doesn't cause LinuxCNC to think the axis is moving without command. Then, you can even unplug the axis while LinuxCNC is running, and plug in the shorting plug.

Another scheme is to have two LinuxCNC config file sets, one with the A axis and one without.

Jon


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