Saturday, October 04, 2025
Hello World - By Request
Someone likes "Hello World"? Ok, a compromise. Here it is with some 3, 4, and 5 hundred micron markers. The markers are done at a pitch of 15, 20, and 25 microns respectively:
For a sense of scale, the "m" in "300μm" is about the width of a hair.
Attaching the probe was harder than expected. The eventual solution was to put it on a 20mm Metriccano Square Strip using an M3 x 35mm screw, adding a spring washer, and attaching that to the end of the Z Axis Driver with a nut. Tightening the nut raises the tip. Tip can be easily swung in and out by sticking a rod into the yellow block as a lever.
I adjusted Z height for the starting dot for each pass, getting lighter each time for smaller dots. With the binocular microscope it is easy to see that the dots get deeper as the probe tracks right. Possibly the slide wasn't quite level?
The other stand-out is the curling of "ld" which I'm unsure about but suspect stage rotation. More testing needed, but I think I need to get that probe in the dead centre next, so the UV LED will cure resin properly, and get a few mm of height adjustment.
Once that's done:
Make new fine probe tip, make new prepped slide, test Z Touch, and make some small stuff!
