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jo@gmedia.nl

what is the big different between 1 or 2 - solved

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???

ultimaker 1 or 2 ???

What do you want to know ?

Yes it looks like you have too big overhangs and they look sloppy.

Yes your brim is lifting up off the print bed and are not flat..

Yes it looks like your belts might be loose and allowing too much play...

sorry but a little tiny bit of information might be helpful.. so we can help you !

Ian :-)

 

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I see the problem - Ian - it's tilted on the final 5mm of layers.

The problem is you are losing steps in either X or Y axis. In the photo it is slipping in the left/right axis which if that's how it is viewed on the platform would be the X axis. Step 1 to figuring out this problem is to figure out which axis is slipping.

Now you have gradual slip at each layer. Usually (but not 100% maybe 90% of the time) this means something is rubbing on the stepper or the short belt. There have been a few UM2's where the pulley on the stepper motor is rubbing the wall. Or the belt is rubbing the wall. Take the cover off the motor on the problem axis (there is only one screw to remove) and with power off push the head back and forth and see if the belt twists different directions when it changes directions. If so then the belt is rubbing and you need to move the pulley on the motor farther from the wall. Only a tiny bit. Alternatively you could add 4 washers - one under each of the 4 spacers. You probably only need to move .5mm farther.

The other possible problem is slipping pulleys. There are 6 pulleys for each axis but it's usually one of the 2 on the short belt - the belt connected to the stepper. Tighten the set screws on all 6. Tighten the hell out of them. So much that the allen wrench twists a bit but not so much that you break the allen wrench.

Consider marking each of the 6 pulleys with a permanent marker and mark the rod and so if it slips you can see which one is slipping.

 

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