Prusa Research i3 MK2.5S Multi Material Upgrade 2S, Руководство пользователя

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13 Troubleshooting
In case you encounter any problems with the MMU2S unit, first make sure that you have the
unit properly assembled and positioned as described in the assembly instructions and this
manual.
Please pay attention to every step of the assembly manual and this
handbook. Most issues are usually caused by skipping certain chapters or
by not following the instructions.
Here are the most common problems and their causes, plus suggested solutions:
1. Incorrect setup of the spool holders and buffer
To learn how to place everything correctly, please see chapter
​
3 Placement and setup
​
in
this guide.
2. Incorrect alignment of pulleys
Inaccurate alignment of the pulleys results in loading/unloading problems and excessive
filament grinding by the pulleys and the accumulation of filament dust. The pulleys must
be perfectly aligned with the filament holes. To learn how to align pulleys, please see the
assembly manual at
​
manual.prusa3d.com
​
.
Pict. 30 - Pulley alignment
3. Excessive tightening of the idler screws
Tighten the two idler screws with springs, so the heads of the screws are approximately
0.1mm to 0.4mm under the body level of the MMU2S in the initial state.
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