Z Axis Caliper Calibration Mount

thingiverse

I was sick of printing calibration cubes so I came up with this for a more accurate result. I made one for the Mitutoyo Absolute calipers and one for the economical ones sold at Harbor Freight. I know not everyone can afford a $120 caliper. Once I did this calibration all the floors and tops pf my prints were glass smooth.Insert your caliper into the holder, set it in the center of the bed and slip it under the X axis. Use the down movement for the z axis during calibration. Once numbers are recorded and adjustments have been made then take the Z up again and repeat.Use this online calculator to find your estep numbers.https://www.layerfused.com/3d-printer-calibrationWhen I do this I keep recording and adjusting until it gives me the same results twice. The temptation is high to use the "origin" feature or to zero the caliper. Do not do this as it will result in incorrect measurements due to pressures your hands can put on the whole assembly while setting up. Slip caliper into holderPosition under x axis snugRecord the number (it will not be zero)Move z axis down via the "Move Axis" menu your desired distance and record the new number. I usually do this in 50mm movements.Subtract second number from first to get the total movement number.Enter the current estep number, the target movement, and then the actual movement.Adjust esteps to the new number and repeat until the actual movement reflects the target movement number.