Square, Known Distance Calibration tool
thingiverse
This nickel calibration focuses on measuring internal holes, whereas the current method employs two known distances for more accurate measurements and calibration. The parts feature dimensions of 20mm and 40mm, with 90-degree corners that help ensure square axes. However, the height is only 3mm and may not be sufficient for z-axis calibration. To calculate the correct steps per millimeter, divide the desired distance by the actual movement and multiply it by your current steps per mm in firmware. For instance, if you moved 54mm but wanted to move 50mm, the percentage error would be 9.25%. Applying this formula to a current step of 40mm gives a new step value of approximately 37.04mm. Repeat the process until achieving desired precision.
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