step per mm

netzmark

I'm not sure if there were a thread about this however I didn't find.

My new A5 printed the test cube 20x20 with dimensions 20.3x20.3x20.15.

M501 read the settings

M92 {axis}{value} changes step per mm parameter.

M500 save as always.

Factory M92 are X80.00 Y80.00 Z800.00.

Changed to M92 X78.82 Y78.82 Z794.05 calibrated my machine perfectly.

Formula to calculate it is simple [expected size]*[actualy stored value]/[measured size].

So in my case 80*20/20.3=78.817, but we can store only two digits after dot, so 78.82.

br

Marek

Samuel Pinches

I recommend also doing a 40 x 40 cube to double check your calibration. As this can also be affected by the nozzle over extruding or under extruding.

netzmark

Good appointment, I will test it tomorrow :-)