Axis Caliper Alignment Jig

thingiverse

I recently upgraded my Wanhao Di3 to a RAMPS v1.4 running Repetier v0.92.9. The upgrade was necessary due to the fact that I had experienced two Melzi board failures within 18 months, and I wanted to take advantage of the latest release's extra functionality and greater control. The process wasn't overly complicated, but it did require a significant amount of time to calibrate everything properly. One of the challenges I encountered was tuning the steps per mm for the X, Y, and Z axes to achieve an acceptable level of accuracy. This is where the Axis Caliper Alignment Jig comes in. The video above explains everything you need to know, and this design should work with most metal-framed Prusa variants. However, it's likely that you can easily modify it to accommodate your specific printer setup. All parts are designed to be printed without support, as shown in the orientation image for the main caliper block. The angled edges are all above 45 degrees, which ensures that they will print smoothly. A few additional notes: 1) I only show Repetier software here, but you can also enter Gcode directly to produce the same result. 2) The caliper used is a cheap one from Aliexpress and has a common form factor, making it widely usable. If it doesn't fit perfectly, my excuse is that I didn't have a caliper to measure it with, but I made two prior prototypes to ensure it was accurate. Print Settings: Printer Brand: Wanhao Printer Model: Wanhao Duplicator i3 V2 Rafts: No Supports: No Resolution: 0.2 mm Infill: 30% Notes: All parts can be printed without support, and I usually use a print speed of 40mm/s to prioritize accuracy over speed.