I found this great Mitutoyo micrometer head on e-bay- a $150 unit for $20, shipped. Second hand industrial surplus is great.
|Mitutoyo 148-811 Micrometer Head|
I updated the Z-axis screw holder to accommodate the new micrometer head and printed it out.
|Mount for Micrometer Head|
|Everything Mounted and ready to go|
So far it seems to work great- it's a lot easier to dial in the nozzle height. Some people claim that adjusting this in software is easier, but for me twisting a knob and immediately running the program again is the most convenient way to go.
To give it a try I ran the old standby- the 5mm calibration object pyramid. It looks better each time. I'm still puzzling at how to get the top block square, and the bridging tests aren't super clean. (visible on the back of the pyramid)
|5mm calibration object test|
|Back of Pyramid|
With the hot-rodded printer, I designed and printed a replacement part for the swiffer. The piece that connects the handle to the mop head broke. It's a challenging part- it has a large internal ACME screw thread to join it to the handle. To my amazement it threaded right on, no cleaning of the threads needed. So far it seems to work just like the "factory" part. Download this part here.
|Swiffer with new head mount|