This feature is built into Cura. I believe from another post that you use another slicer, right? Maybe you can build this "forbidden zone" into your slicer.
But of course I recommend to switch to Cura. Do you print with PVA as well? Cura contains smart features with nozzle temperature control which is essential for PVA reliability.
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picaschaf 3
I rearranged my build so it fits and doesn't collide with the hook. You see the arm in the front, if I rotate it so that the long part is in the back and the "pointy" part in the front - same position - the print core switch collides unstopped by the system with the hook in the back right. Similar problem when I add to this model a 5 layer skirt with 1mm distance to the model the head will scrubb (far less violently than colliding with the hook) against the right rail. So the right 1,5-2cm (and around 3-5cm in the back) of the build plate is essentially dead. On the left side there is absolutely no problem.
Don't understand me wrong, in my opinion this is absolutely okay due to the print head design (which is still really smart and reduces the need of an actuator to retract the second core). But the firmware should cap the coordinates in order to prevent such bad crashes regardless what the gcode tells the machine to do. It would be a really simple fix (when relying on a calibrated X/Y axis, which we should be allowed to).
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