Hi all,

I'm new here so be gentle with me.

I have a Tevo Tornado and I'm having issues with calibration that I've never seen before.

On a 20 x 20 x 20 calibration cude I'm approx 0.12mm low on x and Y but bang on 20mm on the Z axis. The calibration block I'm using also has three 40mm lets and on X and Y I'm 0.8mm under 40mm on X & Y and 0.5 over on the Z. So how is it that I'm seeing such a difference over a further 20 mm? I'm completely baffled and not new to 3D Printing.

Any help would be appreciated.