Aluminum Prusa i3 X/Y Calibration

[tfjield]

The firmware for my Geeetech Aluminum Prusa i3 has the calibration for the X and Y axis set to 78.74 steps per unit. However, it has a 2 mm belt and a 20 toothed timing pulley, so I believe the calibration should be (200 * 16) / (2 * 20) = 80.

Is this correct? I'm assuming the 78.84 was leftover from a machine with an XL belt...

[Mark]

yeah it should be 80, you can change it to see if the results is better or not, and if necessary, change the value to a proper number to get an accurate results of dimensions.

[tfjield]

Will do! Thanks, Mark.

[grump010]

Mine calibrated very close at 81, I also had to calibrate the extruder as it was under extruding. The extruder change was 95 to if I remember correctly 134. I watched one of Tom's videos to walk me through it:
https://www.youtube.com/watch?v=YUPfBJz3I6Y

Cheers
Daryl B.