MH3000 Z micro switch

thingiverse

Tired of struggling with your course-threaded optical sensor? Time to ditch it for good and upgrade to something far better. A bit more work upfront, but well worth it in the long run! First things first: you're going to need a few essential items. I turned to my trusty small micrometer from this great set at Harbor Freight (check it out here:http://www.harborfreight.com/3-piece-micrometer-set-66512.html). Next, grab these fantastic micro switches - part number ES3RL (found here: http://www.amazon.com/Endstop-Microswitches-3D-Printer-CNC/dp/B00G2E6UZC/ref=sr_1_1?s=industrial&ie=UTF8&qid=1408573041&sr=1-1&keywords=endstop+microswitch). First off, you've got to saw off that pesky "C" section of your micrometer. What this leaves behind is just the threaded handle and shaft. Time to get printing! Grab both files and set up your micro switches according to their respective specs. Next, you'll want to remove your old optical sensor and its associated flag. Carefully cut that old sensor out of the wire loom - you might need some extra wire extensions to accommodate full bed travel. With the white and black wires ready, it's time for soldering duty. Mount those micro switches onto "MH3000 microswitch z.stl" with ease. Place your modified micrometer firmly into its corresponding holder, "Caliper mount V2.stl". Ensure they line up perfectly on your printer before moving to Z-home. Rotate that caliper gently until you hear the satisfying click of the micro switch triggering. Give yourself a nod when you've verified your correct Z home height from the bed! That's it – sit back and enjoy this fresh upgrade.