LinuxCNC homing twice in Axis SImulation

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kwanlokto
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24 Nov 2025 16:16 #339156 by kwanlokto

LinuxCNC homing twice in Axis SImulation was created by kwanlokto

I'm having trouble understanding why my "axis" simulation is getting "Cannot home while shared home switch is closed". This happens once I click "Home All" twice. I'm wondering if I have something setup incorrectly.

My end goal is to be able to do this via python. I have attached my current python code (which I don't think is the issue) and I get the same issue.

Thanks

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tommylight
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24 Nov 2025 16:46 #339158 by tommylight

Replied by tommylight on topic LinuxCNC homing twice in Axis SImulation

Simulated switches so you have to move all axis to be able to home again.

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kwanlokto
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24 Nov 2025 16:57 #339159 by kwanlokto

Replied by kwanlokto on topic LinuxCNC homing twice in Axis SImulation

Thanks for your reply tommylight. Sorry if this sounds stupid but I selected each axis (X, Y, Z) and click the +/- buttons to move it in that direction, but it still doesn't seem like Home All works. It only seems to home the y axis (so j = 1).

Im still getting errors for j = 0 and j = 2

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tommylight
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24 Nov 2025 18:42 #339165 by tommylight

Replied by tommylight on topic LinuxCNC homing twice in Axis SImulation

I do recall getting the same thing sometimes, but i never really bothered with why it happens, it is a sim and i use it only to check the gcode sometimes, not for anything important.
If you want to test on a real machine but with no machine attached, use the parallel port configs, so will work even with no parallel port, but it is a real machine so nothing is simulated. You will have to use immediate homing for it though.

The following user(s) said Thank You: kwanlokto

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rodw
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25 Nov 2025 06:23 #339185 by rodw

Replied by rodw on topic LinuxCNC homing twice in Axis SImulation

I think what you experienced is expected behaviour. Once an axis is homed, it can't be homed again unless its unhomed. I did notice recently in a axis sim that the unhomed menu was not enabled...

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LinuxCNC homing twice in Axis SImulation

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