Prusa Original Prusa i3 MK2.5, Руководство пользователя

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overtightened. Loosen the two screws (one on each side of the MMU2 unit) a little bit and try
again. If the barrel still can’t rotate freely, you can open the idler completely and verify that
nothing's blocking it.
Pict. 24 - Idler opening
12.6 Replacing the blade in the selector
The blade in the selector will wear over time. When the blade can’t cut the filament anymore,
it is time to replace it. Please refer to the
​
assembly manual
​
for more detailed description of
each step.
1. Disconnect the orange PTFE tube from the selector by removing the silver fitting on
top of the selector
2. Remove ​ three screws ​ holding the selector motor in place
3. Pull out the
​
selector motor and two shafts
​
to release the selector
4. Loosen
​
two screws on the blade-holder
​
and carefully remove the blade. Use
needle-nose pliers to remove it, if possible
5. Insert a new blade, tighten the blade-holder and re-assemble the selector unit
12.7 Setting the PTFE tube length - filament not reaching Bondtech gears
If the filament doesn’t reach the Bondtech gears or you choose to use a different length
PTFE tube, you need to update the PTFE length settings.
First, enter the service mode:
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