I have a Geeetech M201 printer. First one I have owned so be kind!
After various issues with the kit I finally got it up and running with a lot of help from a friend who has a couple of printers. The problem I have is that when printing anything over a few millimetres high the prints start to move. The best way to describe it is like a beach, ripples front to rear, very slight side to side but worst front to back. Hopefully if I’ve got it right there should be a picture of a small block. Dimension wise it’s spot on.
What’s been done so far, removed the metal plate and fitted glass print bed (weight reduction/reduced inertia), changed the Y axis (front to back) motor for a bigger one, replaced all the 8mm rods (some arrived as much as 0.8mm bent!), adjusted the stepper drivers to 1.2 volts.