Prints slanted on the X axis: how to fix?

[uze6666 1]

Hi,

Lately I have started to notice that my prints are slightly slanted on the X axis. It's annoying because corners are not 90 degrees anymore and parts won't fit together. The bigger the part, the bigger the difference. I homed the print head and took my caliper to measure the distance between the Y axis rods. Sure enough, I measured about 1.6 millimeters between the spots on the picture below.

How can I correct this? Is there a procedure somewhere? I can't seem to find an assembly manual for the UM2. :???:

Thanks in advance for any help.

 

[gr5 2,189]

You have to loosen I believe 2 of the long belt pulleys. For example the top 2 in your photo (the rear two for the rear X axis belt - then slide the top and bottom blocks all the way to the left, verify the 2 distances are now equal and retighten the long belt pulley set screws. Very very tight. Repeat for Y axis if not already perfect.

 

[IRobertI 520]

You can find the assembly manual here, at the bottom:

https://github.com/Ultimaker/Ultimaker2

 

[uze6666 1]

Fixed! Basically, as gr5 proposed I just had to unscrew the two pulley that drives the Y axis (the ones on the console side) and displace the belt a little bit. It took a few try to get it right but I was able to adjust the machine and it prints fair and square as before!

Thanks for the help!