E3D Mount for Pittsburgh (Harbor Freight) Digital Indicator

thingiverse

I had a couple of problems with the original design. The hole for the indicator was too small, so I made some adjustments. Also, I didn't want to heat up an M4 bolt when I have a set of metric taps on hand. So I downsized the set screw holes and then drilled and tapped them for a secure fit. By the way, Harbor Freight has Drill Master bits that work great on 3D printed items - they're a drill bit in front, a tap in the middle, and a deburr face at the end. Simply make a pilot hole smaller than you want, drill it out with the tap, and you're good to go. Of course, it's still plastic, so it won't make as strong of a connection as a properly threaded piece of metal, but for this purpose it was fine. In addition, the Pittsburgh had a giant hook in the back that got in the way of everything. So I removed the back, measured it carefully, and made a new one. I lost a screw along the way, found another, and didn't bother countersinking the holes or beveling the edge because with this mount it just doesn't matter. In practice, get one part of your bed level how you like it. Snap this on so that the probe is lower than your nozzle and zero it out. Now move to the other corners and make them read zero too. And voila! Your bed is now level (well, trammed, but everyone says level). Since I have E3Ds on two of my 3 printers - and soon to be all four - this design is pretty portable. By the way, this mount comes in two separate pieces, so if you just want the back you don't have to take the whole thing apart.