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Rat Rig Community [Unofficial]•3y ago

nursing-lime

Pause Print: Move Out of Range (Tool-Changer)

Hi,
I've encountered this problem a few times before, but never knew what the cause was. Now I'm relatively sure what the problem is, but don't know how to fix it in RatOS/klipper-config.
I have a V-Core 500, but added a custom Tool-changer (similar to e3d's tool-changer). Now, I had to set offsets (X,Y and Z) for each printhead in the config, so that the nozzle is actually printing where I want it to print. The problem is that when I call a RatOS macro (e.g.: CANCEL_PRINT, PAUSE, etc...), it wants to move the printhead to a position that it cannot reach, because of the X or Y offset. My question is, if it is somehow possible to make the RatOS macros use the "original, non-offsetted (Z-Probe) Coordinates" instead of the coordinates of the printhead that is currently in use.
I attached an image. You can see that in the dashboard, there are always two values shown for the toolhead position. The smaller one in brackets is the position of my Z-probe. That's also the position that is always used for the min. max. XYZ positions. You can for example see, that there is a 36,5mm offset in Y for the printhead that I used. I could for example move that nozzle to Y=-30 without any problem, because the min. Y coordinate always references the value in the bracket (the one from my z-probe), and at Y=-30, the value in brackets would be [Y=6,5], so no harm. I can however not reach the full Y=500 with the nozzle. And that's causing the problem here. It is good that it doesn't go there, because it would crash.
I've already gotten lost in the klipper config many times and I'm still not sure which "params" are stored when and where. So maybe someone has an idea how to fix oder overcome this issue.
Otherwise I'd have to write all of those fancy RatOS macros from scratch and with fixed XYZ values, that are all within the boundaries for all of my printheads. Would do the job, but is not really sophisticated