MPSM V2 Extruder (Outdated See Decription) by wileykyoto

Last crawled date: 3 years, 1 month ago

WK8 Extruder
MPSM V2 Extruder Replacement.
This is outdated, please use the improved WK9 Extruder
This is an upgraded extruder meant to work with the V2 stock hardware (mid 2017 - Current). The only exception for parts is the Bowden tube fitting. Part of the reason to upgrade is that the stock Bowden tube fitting isn't a standard part, so when it breaks you'll need an alternative. This extruder is meant to work with a PC4-M6 Bowden Tube Fitting and an M6 nut. You can pick up a PC4-M6 fitting online easily and you should be able to find an M6 nut at your local hardware store.
Stock parts:
Screws
Arm Bushing
Spring
Bearing (4x11x4)
Feeder Gear
Needed parts:
PC4-M6 Pneumatic Straight Fitting, for 4mm OD tubing.
M6x1.0 Nut
Notes:

I printed this with PLA (Hatchbox - Pantone Yellow C), 2.1mm wall thickness (6 shells), 20% infill, no supports, no raft.


If you just want to print a replacement Arm, you won't need any extra parts. Just print the Arm and Cap.


The Extruder Cap (which holds the bearing in place) comes in 4 different tolerances, I
recommend using whichever fits in the tightest, as it helps properly support the bearing. I used the .05mm tolerance version, and it snapped securely in place. You'll want to flip this part over in your slicer (top down)

The Extruder base has a 4mm hole leading up to the slot that takes the M6 nut. This is meant so you can put a small length of PTFE tubing (<20mm), cut with a V shaped point (when looking from above), so that it nestles in between the drive gear and bearing (without touching). This helps guide the filament through the extruder and will allow you to print flexible filaments like TPU.
Acknowledgements:
Shout out to robin7331 and his MPSM Extruder Baseplate V1 for the idea to make a slot for a nut to work with a PC4-M6 fitting.