Distortion calibration on XY plane in Repetier

I built a delta 3d printer (like a mini Kossel) and now I'm trying to calibrate it. I made all the horizontal and vertical bars myself with wood and I bought angle joints (between bars) made with 3D printed ABS.

It passes all tests in Z correction tools calibration. I used a z-probe (with manual deploying) to calibrate it with G32 and G33 commands.

Now I'm trying to calibrate the distortion that takes place on the x and y axes. Basically what happens is that in a test cube of 10x10x10mm it is translated on x and y axes at some points in the corners.

Below an explanatory image:

The dimensions are good (less than half of a mm) but got this bad visible distortion (about 1 mm or less).

There is a tool or a command in Repetier-host/firmware that corrects this issues?

• i myself find same problem with my machine after searching i found out my frame of printer is bend at 2 degree angle at x axis so my all printed object are printed at that angle of 2 degree in x axis. so we need to straight our frame but it is impossible to do for me. So if you found something please inform me as well. – Akshay Raut Sep 10 '18 at 7:24
• Not an answer as specifically requested to use Repetier, but please note that Marlin Firmware has skewness compensation implemented. This is implemented in the configuration file, and found under header Bed Skew Compensation. You basically print a square and measure the diagonals and insert these measurements into the configuration file. This should be used as a last resort, it is better to fix the geometry of the hardware. – 0scar Sep 10 '18 at 8:05