25mm calibration cube with empty top

by jotape, published

25mm calibration cube with empty top by jotape Jan 29, 2013

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38310Views 20750Downloads Found in 3D Printing Tests
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Yet another calibration cube that I tried to keep fast to print. Made in sketchup, it is 25x25x25mm. You may resize it when slicing it in case you need other round numbers for your calibration.

It also makes a nice present for friends who are curious about 3D printing :D


Print one cube, measure each axis with the caliper and recalculate your steps per axis as follows:

  • new_steps_per_axis = 25/measured_size_in_axis_in_mm * current_steps_per_axis.

Iterate until you are happy :)

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What is the designed wall thickness? I'm guessing 3mm?

Hi, I modelled this part in Sketchup but didn't preserve the original. Anyway, I think your guess is right (it could be 5mm too, I should check with an actual printed cube)

I Have calculated that I need to change my Y axis steps to 94.912, but how do I change my steps per axis?

Hi! You must update your configuration file and load again your firmware. Actually, it depends on your firmware, is it Sprinter, Marlin or Teacup? In Marlin it's DEFAULT_AXIS_STEPS_PER_UNIT, in Sprinter it's _AXIS_STEP_PER_UNIT and in Teacup it's STEPS_PER_M_Y.