Oops. Disassembling Probe Number Five

Yes, disassemble number five. After smacking it around while investigating the probe height problem in the previous test the tip looks like this:

Well, damn. This is why we do not use micron probes for etching. I used the Probe Assembly Jig to get the probe out by the way, and it makes a decent Probe Disassembly Jig. May as well practice the technique on a damaged one.

This has implications for the previous test, in that it was unlikely I was ploughing the point per se into the marking dye. I have no idea at what stage I stuffed the tip, but I strongly suspect the initial touchdown into the resin-covered touch plate.

I'll make a new probe assembly using one of the acid-etched tips and try that out for resin deposition. Probably should image it after after the first touch and see what it looks like before I try depositing resin. It won't be anything like as accurate, but we'll see what data we can get out of it - particularly with regard to robustness!

The upgrades to the Y axis are done, by the way. I've added an 11mm booster under the tension bands to put more pressure on for anti-backlash. I added an extra band on each side too, though the little hook that they hang on to looks slightly over-stuffed with band.

If that works out, I'll put it on Github. Strange though that the other two axes don't show the problem. The Y axis isn't even the one with the highest loading.