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How to trim PTFE tube - Multi Material

How to trim PTFE tube - Multi Material

How to trim PTFE tube - Multi Material
Last updated 2 years ago
How to trim PTFE tube - Multi Material
 Difficulty
Moderate
 Steps
11
 Available languages
CSDEESFRITJAPL

Step 1 Introduction & proper tools

Introduction & proper tools
Introduction & proper tools
Introduction & proper tools
Introduction & proper tools
This guide is dedicated to the PTFE trimming for multi material Original Prusa printers, supported models are listed later on.
For single material Original Prusa printers PTFE trimming guide, go to: How to trim PTFE tube - Original Prusa printers
ATTENTION!!! Please read all instructions at least twice! If you trim or drill the tube improperly, you will have to order it again!
READ CAREFULLY instructions for the tools before you proceed further. Prusa Research is not responsible for any harm or injury.
During assembly of your Multi Material, it might happen your PTFE tube is too long to fit in the Y-splitter.
For trimming get a cutting tool with a thin blade. Use either razor or carpet knife. DON'T use kitchen knife.
For drilling is recommended to use a drill bit with conic head or you can use a drill bit with diameter 3,5 - 4 mm. The point is to make a conical entrance in the tube.

Step 2 Where to trim the tube (important)

Where to trim the tube (important)
Where to trim the tube (important)
IT IS CRUCIAL to cut the correct end of the tube, check twice before you start!
One end of the tube has "rounded" outer edge. DON'T CUT this part.
Look at the other end, where the tube is drilled inside, shape of the edge is "conical". This is the side you CAN CUT.

Step 3 Trimming the PTFE tube

Trimming the PTFE tube
Trimming the PTFE tube
Trimming the PTFE tube
Take the razor or knife and carefully trim the tube.
Don't press too hard during the cutting on the tube, you can deform the circular shape and this will lead to filament jam!
Optimal length is 41 mm for Multi Material.

Step 4 Drilling the tube's edge

Drilling the tube's edge
Drilling the tube's edge
Drilling the tube's edge
After cutting the tube to appropriate length, you need to renew the conical entrance.
Use the drill bit you've prepared in the beginning. You can use electric drill, but set it to low RPM and press very gently.
It is important to achieve smooth entrance, so the filament will slide in. Clean the tube from any particles, which might prevent it.
That's it! Place the PTFE tube back to the Multiplexer and continue with the assembly.

Step 7 PTFE for the MK3S/MK2.5S MMU2S (part 1)

PTFE for the MK3S/MK2.5S MMU2S (part 1)
PTFE for the MK3S/MK2.5S MMU2S (part 1)
PTFE for the MK3S/MK2.5S MMU2S (part 1)
PTFE for the MK3S/MK2.5S MMU2S (part 1)
This an ideal shape of the PTFE tube for Multi Material printer. Given dimensions and angles are recommended values.
HOTEND PTFE
PTFE HOLDER
EXTRUDER TO MMU2S UNIT
See the next step for the other PTFE tubes for the MMU2S printer.
All dimensions are in millimetres.

Step 8 PTFE for the MK3S/MK2.5S MMU2S (part 2)

PTFE for the MK3S/MK2.5S MMU2S (part 2)
PTFE for the MK3S/MK2.5S MMU2S (part 2)
This an ideal shape of the PTFE tube for Multi Material printer. Given dimensions and angles are recommended values.
MMU2S UNIT TO BUFFER
All dimensions are in millimetres.

Step 9 OBSOLETE: PTFE for the MK3/MK2.5 MMU2 (part 1)

OBSOLETE: PTFE for the MK3/MK2.5 MMU2 (part 1)
OBSOLETE: PTFE for the MK3/MK2.5 MMU2 (part 1)
OBSOLETE: PTFE for the MK3/MK2.5 MMU2 (part 1)
OBSOLETE: PTFE for the MK3/MK2.5 MMU2 (part 1)
This an ideal shape of the PTFE tube for Multi Material printer. Given dimensions and angles are recommended values.
HOTEND PTFE
PTFE HOLDER
SPOOL HOLDER
See the next step for the last PTFE tube for the MMU2 printer.
All dimensions are in millimetres.

Step 11 OBSOLETE: PTFE for the MK2/S MMU1

OBSOLETE: PTFE for the MK2/S MMU1
OBSOLETE: PTFE for the MK2/S MMU1
OBSOLETE: PTFE for the MK2/S MMU1
This an ideal shape of the PTFE tube for Multi Material printer. Given dimensions and angles are recommended values.
HOTEND PTFE
EXTRUDER TO MULTIPLEXER
All dimensions are in millimetres.
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