Retrofit Micrometer Endstop Target for Taz 4/5

thingiverse

A Mitutoyo 148-507 micrometer head reportedly fits this one. I haven't tried it myself, but the person who tested it on my openbuilds Z axis mod says that it will work fine. 1-21-2015 - A repaired file has been uploaded. I added a Micrometer to my openbuilds Z axis retrofit, and several people asked for a variant that fits the stock Taz 4 / 5. This is that variant. You can see the Openbuilds version in the picture above. This one is almost identical, but has the socket for the 10mm smooth rod for a stock Taz. The issue with the stock bolt and spring endstop target is that it can move with repeated impacts and heat and cooling cycles. Every time the limit switch hits it, it releases pressure on the threads, which allows the spring to sometimes press the bolt upwards a tiny fraction of a mm. Eventually, after a few hundred impacts, the bolt moves up far enough to affect layer height. By replacing it with a micrometer, you get an endstop target that will never move due to heat or impact, and allows repeatable layer height adjustments down to the thousandth of an inch. I used this Micrometer: which seems to be a knockoff of Mitutoyo. Any micrometer with a 9.7mm diameter, 6mm tall mounting barrel, 14mm diameter retention ring and at least 22mm long measuring shaft should work. A Mitutoyo 148-507 reportedly works but I have not tested it myself. Print Settings Printer Brand: LulzBot Printer: TAZ 5 Rafts: No Supports: No Resolution: 0.5mm nozzle Infill: 85% or better Notes: ABS is recommended. Post-Printing Instructions This print includes a built-in Skirt and removable "mouse ears" to aid in bed adhesion. You will remove and discard those pieces at the end. You will need 1 M3 heat set insert for the Smooth rod retention bolt socket. Insert that as normal. The micrometer should just screw into place, then bolt the whole unit up as normal to your TAZ.