Adjustable RepRap i2 Z-stop

thingiverse

This is a simple, adjustable z-stop bracket for a Reprap i2 or any 3d printer that needs to hold a stopper switch. Its made to mount to an 8mm rod in the standard position that Reprap i2 usually mounts its z-stop. The parts are as follows: zstop.stl - the "main mounting bracket" for mounting to the printer. zstop-part2.stl - is the "stop switch bracket" that gets attached to the z-stop switch, and then attached to the "main mounting bracket" in #1 above. zstop-part2-right.stl - identical part to #2, but the screw positions are reversed. if your not sure, this is probably the correct one to print. Print Settings Printer Brand: RepRap Printer: i2 Supports: No Resolution: 3.5mm Infill: 70% Notes: The tolerances are tight. Its made so you sand the moving parts to get them smooth. its important not to have any play in the part movements. Post-Printing Assembly and Important note: The main mounting bracket will interfere with your X-end-motor as it descends because it may not hit the z-stop switch before interfering with the bracket. Watch the video. I glued a small "button like" slider (basically a rigid plastic disk) underneat the X-end-motor so it hits the switch well before these two parts collide. Its a simple thing to make but i did not post an STL for it. Any plastic disk about 4mm thick will do. Mounting to the smooth 8mm rod: You do not have to disassemble your printer, if you print PLA or similar material with flexibility, you should be able to snap it over the rod. I made the hole 8.5 mm to allow for this, but also allow it to secure well. Cleaning Be sure to clean out the screw holes. They should pass the screws without needing to turn them, but not so much that they wobble or are loose. Sanding The moving parts that touch each other should all be sanded smooth. The parts should slide smoothly but not wobble loosely. Custom Section Hardware The adjustable thumb screw is an M5 with nut. The nut holder must be cleaned up after printing as it is very snug (on purpose) The "stop switch bracket" uses M3 nuts and bolts as does the rod mount. Taking the time to smooth any printing ridges out, makes it move and work real nice. Inside you can add a spring so when you loosen the thumb screw, it lowers without having to push it down. You would insert the sprint inside the "main mounting bracket" prior to inserting the "stop switch bracket." I made the mount for the rod twice as tall as the typical zstop to give it more gripping power as not to slide or move once you have it set.