Adjustable Z Endstop for MakerFarm Prusa i3v

thingiverse

Note: there are two versions of the switch bracket. Choose the longer one if you have the newer endstop switches with wheels on the arms. Note: this part fits the 8" i3v. The 10" printer has longer X extrusions that block the screw unless you trim the excess length. As requested, here is my adjustable Z endstop for the MakerFarm Prusa i3v. If you've got an i3v, you've probably been waiting for this. This thing includes a new switch bracket to relocate the Z limit switch on the right side of the right-hand Z extrusion and an adjustment screw plate that mounts to the bottom of the lower X extrusion. See the instructions for recommended mounting hardware. Thanks to DogByte for the suggestion. If there are other parts you want for the i3v, just leave a comment below. If you're looking for better X and Y endstops, too, you may wish to consider this: http://www.thingiverse.com/thing:321810 UPDATE: I now also have a micrometer-adjustable Z endstop available: http://www.thingiverse.com/thing:356819 Instructions The switch bracket mounts to the right-hand side of the right Z extrusion. The screw bracket mounts to the underside of the bottom X-axis extrusion with an M5 bolt and T-nut. My kit had extras, so I didn't have to buy any hardware. For the adjusting screw, I recommend an M3x20. You can use an M3x16 left over from the i3v kit, but you won't have as much adjustment range. Just slide the switch bracket up and down to make a rough adjustment and then use the screw to dial it in. I tapped the adjustment screw hole with an M3 tap, but found that I wanted the screw a little tighter. You may wish to just force the screw in so it makes its own threads and sticks in place more securely. To mount the switch, use M2.5x12mm screws. You can tap the holes, but I just forced them in so they made their own threads. Make sure the switch still operates freely after mounting. The switches that come with the MakerFarm kit can bind if you tighten the screws too much. You can slide the screw plate on the X extrusion to line the adjustment screw up with the switch lever and then lock it down. I installed my X extrusions so they're contacting the stops on the left side, so it lined up nicely. If you have trouble lining it up, let me know and I can make adjustments to the parts. Note: there are two versions of the switch bracket. Choose the longer one if you have the newer endstop switches with wheels on the arms.