MP Maker Ultimate Z-Stop Adjustment Screw Knob

thingiverse

I have discovered that the Z-stop adjustment screw on my Monoprice Maker Ultimate lacks a lock nut and can easily fall out of adjustment. Furthermore, this screw must be adjusted every time the bed is leveled, nozzle is changed, or printing surface is modified. To simplify the process, I designed a knob and thumbwheel nut holder to attach to the M3 adjustment screw. PARTS M3 x 30mm socket cap screw M3 nut Screw knob Nut thumbwheel INSTALLATION The model files are dimensioned for a very tight fit against the nut and screw threads. Scale the model in the slicer software to compensate for printer tolerances. Press the nut into the thumbwheel with pliers or a vice, then drive in the screw until it's fully seated. Next, drive the screw into the knob to tap the threads, then remove it. Install the thumbwheel on the screw so that the opening faces the screw head and install it into the printer bed. Install the knob onto the screw threads from the bottom of the bed. It should be tight enough to require pliers to hold the knob while driving the screw with an Allen wrench until it bottoms out. USE My Monoprice Maker Ultimate requires the Z-stop adjustment screw to be adjusted every time the distance between the build surface and nozzle is altered (bed leveling, nozzle change, build surface change, etc.). With the printer turned off and nozzle at room temperature, adjust the Z-axis screw rod by hand to raise the build surface to the nozzle. I set the gap to 0.06mm using the thinnest feeler gauge in my set with good results. After setting the nozzle gap, adjust the Z-stop adjustment screw just until you hear the limit switch close - no further. Lock the screw into position with the nut thumbwheel. The printer is now ready for use.