Microswiss Direct Drive MMU Filament Cutter

• IMPORTANT The retract setting have been changed to 20mm (from 25mmm) as 25mm retract resulted in a few clogs for me
• Updates file have 3 mounting holes on the cutter and parts fan mount
• New Front cover model has 4 flat head screw clearance holes to more rigidly mount the heat sink fan and has been modified for easier printing

Bill of materials

• 2 x 4010 blower fans
• 1x 4010 radial fan
• 1x M3x20 SHCS
• 2x M3x8 SHCS
• 2x M3x6 SHCS
• 3x  M2x8mm I used M2x10mm Stainless Steel Hex Socket Cap Head Self Tapping Screws and cut them
• 1x M3x4 Flat head Screw that comes with the Microswiss Direct Drive
• 3x 6mm (or shorter) long M3 Threaded insert OD 5mm
• 1x piece of 18mm box cutter blade
• 1x 6mm OD Spring 20-25mm loong .5 to .6mm wire id (0.6x6x25) I modified the knife holder for the 6mm spring if you need a 5.5 mm spring see the model this was remixed from here
• 1x The part for the print to bump the cutter arm against, I've designed mine to mount on top of the x axis gantry, this may or may not work for your setup. I had to modify where my pause location is to avoid cutting the filament when I don't want it to.

Setup

BLTOUCH

x_offset: -44.5 
y_offset: -11.4 

Happy Hare for Klipper

Attached is my Filametrix.cfg in a text file this has  all my working parameters

To configure, set 'form_tip_macro: _MMU_CUT_TIP' in mmu_parameters.cfg

My setup retracts the filament 25mm cuts the filament, pushes the cut filament 25mm back into the hot end then retracts. This has proved very reliable for me, adding more retraction has caused bad clogs.

Credit to

Print2Win for the MicroSwiss Ender 5 DirectDrive+AllMetalHotend Assembly

Ahmad Sunardi for the MBOT3D MK2_Rev2.0 (Ender7 style fan duct)

Technik Gegg for the Filament-Cutter-Base-Module V4