Cannot Home While Shared Home Switch is Closed

Hey Folks-

New to Linux CNC, trying to stand up a build. Currently struggling getting the axes to home correctly, I get the error "Cannot Home While Shared Axis is Closed" The switches all appear to be working correctly and toggle on / off appropriately, so not sure if it is something in my configuration files?

Ini and hal are attached, any help is appreciated.

 

I get the error "Cannot Home While Shared Axis is Closed"

Are you sure that is the exact error message? If I remember correctly it is something like
'Cannot home while shared home switch is closed j=2'
Where 'j=<number>' will indicate the joint that was homing at the time. So this information will be very helpful in finding the cause.

yes, the "j=X" part of the error changes based on which axis I attempt to home. I get the error on every axis.

For example, homing X I get: cannot home while shared home switch is closed j=0

Are all home switches "false" when starting to home?

How would I check that? All the switches have the light on when starting to home (and contact with metal turns it off), so they are all in the same state, but not sure how to verify if they are flagged as false when not in contact?

You can use the 'halshow' tool to watch pin values:

linuxcnc.org/docs/devel/html/hal/halshow.html

Alternatively you could just try to invert the home signals by changing this line in your hal:

to this:

Okay, now we're getting somewhere. I watched the home-x-y2 and home-y1-z variables in halshow and they stayed yellow the entire time, regardless of if I contacted them or not. Documentation denotes yellow is "true".

PCW - you were saying these should be "false" by default? Would the reverse typically be caused by a configuration setting or a wiring issue? Or something else entirely?

Appreciate the help!

The logic sense is determined by the wiring and the switch/sensor and can easily be changed in hal, as mentioned above.
Your problem is that there is no change of state when the switches are activated and since the switches seem to indicate that they are working it's most likely a problem with the wiring.
Could you provide more information on the switches used and how you wired them to the board?

[edit]

What board are you using to interface the signals to the pc?