jlas1 / Klicky-Probe

Microswitch probe with magnetic attachement, primarily aimed at CoreXY 3d printers
GNU General Public License v3.0
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UnklickyNG doesn't work with 2.7mm magnets #241

Open ressu opened 5 months ago

ressu commented 5 months ago

This is at least with the AB mounts. When looking at the mount more closely, we can see that the distance from the mount bottom to the magnet at the lowest position is ~1.45mm.

image

This distance is the same for both 6x3 and 6x2.7 mounts. Since the bottom part if the probe body rests on the bottom of the above mentioned mount front, we only need to measure the top portion of the probe.

Looking at the top portion of 3mm probe body, we see that the magnet protrudes 1.5mm above the body. This leaves us with 0.5mm of contact area

image

If we compare that to the 2.7mm variant, we would expect the magnet to protrude 0.3mm less (since the bottom part is the same). This is proven by measurements, which tell us that the magnet protrudes 1.2mm from the body.

image

This leaves a 0.25mm gap between the magnet in the mount and the probe body. Meaning that there is no way the magnets can make contact.

The quick solution was to remove 0.3mm (I actually just chopped 0.5mm) off from the bottom of the mount. But I don't think this is the proper solution. Having a 0.3mm groove in the front of the UnklickyNG body could be a nice solution, but I haven't done any testing on it just yet.