I just recently bought a Maker Select V2. So far everything has printed perfectly fine. Haven’t really had any issues until I tried to print a couple of objects that are mostly cylindrical. For some reason, these objects will start printing fine and then they will start to get deformed a bit and eventually correct themselves. This seems to happen on the left side if you are facing the printer. The deformations seems to start art exactly the front center part of the model and then go to the back center. The right right of the model does not have this issue. I’ve tried redoing the bed as well as check that everything else is square. I then reprinted the default chair model the printer came with and it prints fine. It is only cylindrical models. Not sure what the issue is.

What slicer, material, temps, layer height and speeds?

This looks like the start point to each layer. Slow the print down a bunch and see.

I’m using Cura (newest version) with the Prusa i3 profile. Only thing I changed from default is the z height and set the initial layer print speed to 12.5. The lightsaber emitter was initially printed at a speed of 30 with a temp of 200c. I am using PLA. I went back and printed the smaller cylinder at a temp of 195c and while it did drastically better the issue is still there a little just less noticeable.

There seems to be backlash. Try tighten the rubber belts harder. Have a good day!

I joined the forum today because I’m having a similar problem, though not as bad as you seem to be having. Mine looks like a scar going down the side of the object - and only on cylindrical pieces. I suspect it’s where the print head gets to the end of the layer and moves up to the next layer. I’m using a Monoprice Select Mini V2 with Cura 15.04.6. The default temps are 210 and 70. Any suggestions?