Hi,
I have built a relatively large CoreXY pen plotter with a stepper controlled pen lift, very similar to the setup on a CNC-router.
The Z-axis has a single end-stop situated at the top of the stroke, so homing should lift the pen up to maximum height.
X and Y-axes work flawlessly and homes to the end-stops, retracts a bit and all is ok.
My problem is that I seam to have some erratic behaviour on the Z-axis, that I can't figure out. It might be, that I have got some settings wrong, but homing does not work as I would expect. I made the configuration file on the website and downloaded that. I might have missed something there. The issues are:
When homing all axes the pen lifts, homes XY and drops the pen down again. It never goes to the switch and stays there, as I would expect
Flipping the Z-Axis motor cable does not help and changing z-axis minimum to a negative number makes it worse, as it goes up, hits the switch and ignores it, and keeps going, losing steps
When hitting HomeZ button it just does a strange bounce around 10mm up and down again (it is set to move quite quickly), but it also never goes to the switch, retracts a bit and stops, as expected.
The end-stop seems to be working fine when using manual control. If It is hit while moving (up) it stops as expected, and will not let me move further up, but will let me move down again
I don't really care if I have to move the Z-axis in positive numbers to go down (away from the end-stop) or not. I would just like it to work like the X and Y-axes.
Any help would be greatly appreciated :)
