Print jumps in x and y axis mid print

Hello folks.
I have a problem i thought was belt tension problem first but it seems to be in both x and y axis.

My print seems to jump just like if the belt was loose or something but they are firmly tightened and i would be surprised if it was a belt problem.

I did some quadcopter motor mounts and i have big problems printing it, i attach a picture.

The print is quite good except it have moved 8mm to the right at one layer. this is a old g-file that i have on my sd and have been printed before without problem.

The items sticks hard to the kapton tape, this problem occur on several files



Hope you have any ideas on what it could be....

I've had this a few times. it usually indicates that the head has caught on the print somewhere, maybe because a corner lifted when the head moved away.

See the troubleshooting guide here: [reprappro.com] and the three sections after it [reprappro.com] , [reprappro.com] and [reprappro.com] . Most likey: belt pulleys are loose on the X and/or Y motor shafts.

Ian
RepRapPro tech support

This has happened to me, same as Crouchy, usually something snagging a curling corner or edge. ABS prints seem especially prone to it. For me they tend to snag on the x-carriage by the height sensor or on the sensor itself.