Layer shifting

Updated 3 days ago ​by Tomáš Chvalina

Layer shifting is a printing issue which is causing some of your layers to be shifted off its designed position. To start with it, it is important to check if it is happening in the direction of X or Y axis.

Once you know for sure which axis it is, the causes of these layer shifts are the same. It just differs which axis you must take a look at. 

It still may happen on our i3 MK3 if you would have loosened belts. That is something our firmware cannot cope with. However, you would experience any layer shifts. Please check out that you have in LCD - settings - Crash. det set [on].

Check following:

**Is your print larger (200g plus) or difficult to print? - make sure that your printer is running at the [high-power mode]. You can change this setting in LCD - Settings.**

  1. Make sure that your belts are tight enough/ not too loose. Belts should be tight enough to sound like a low bass note when plucked.
    1. You can check the belt tightness in  LCD - Support - Belt status
    2. Values 240 +- 40 are good
    3. A lower value means more belt tension, higher value means looser belt.
  2. Make sure the pulley on the motor shaft is secure and the idler pulley can move freely on the opposite end.
  3. Make sure there is nothing blocking free movement of your axis. No obstructions in the path of the bearings or possible no waste of previous printing stuck around the belt (usually around the Y-axis pulleys). 
  4. Check your linear bearings by inspecting the smooth rods for marks or deformations. Best thing to do is to gently move with your Extruder or Heated bed to see if at any certain spot would be any friction at all.
  5. Check your motors - it is unlikely that motor itself could be the source of layer shifting. Still, we suggest checking the motor cables for any potential breaks, damages or overtightened zip-ties causing the motor to fail at a certain movement. 

Do not hesitate to contact us at info@prusa3d.com if you would have any following questions.


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