Filametrix Mod

This is a mod of the Voron Stealthburner which adds a filament cutting possibility!

Update

Main Body

Main Body with Filamentsensor Option has been added.

• SB_CW2_Main_Body_Cutting_with_2xD2F_ECAS
• SB_CW2_Main_Body_Cutting_with_D2F_ECAS
• SB_CS2_Main_Body_EBB_ECAS_D2F "CW2 main body for the ERCF w/ ECAs, bearing switch, and SB2209 Canbus mods" Thanks to juliusjj25

Printhead

Update for Bambu Hotend has been added.

• SB_Bambu_cutting_Printhead_back
• SB_Bambu_cutting_Printhead_front or SB_Bambu_cutting_Printhead_front_2
• Bambu_Adapter

Thanks to "Jakub Kadlec" from Facebook :)

Update for Voron Revo Hotend

• SB_RevoVoron_back
• SB_RevoVoron_front

by Russell Gower - NOTE currently untested!!

Update for Rapido Hotend

• see folder

say thank you to juliusjj25 :)

Motivation

I was looking at the ERCF MMU for several month now. What always kept me from starting the project were the discussions about issues and problems with filament tip forming. Suddenly a new company showed us how they do it quite reliable. They just cut the filament. Further motivated and inspired by the design of @pure100kim who has built the ERCF_Filament_Cutting_MOD I started to build my own version of it.

See how it works

Proof of concept 1: https://youtube.com/shorts/HOMG8cVk_U4

Proof of concept 2: https://youtu.be/tTcrxttyths

Filametrix in action: https://www.youtube.com/watch?v=tfMZWQRqtvY

Good to know

Please be aware:

!! THIS IS A WORK IN PROGRESS !!

• This is my very first repository on GitHub. Please be paitend with me :D - Any hints are welcome!
• We will need to use one of the ADXL mounting threads
• Depending on the setup and position of the cutting point we will most probably not lose any build volume
• For the main body i remixed the ECAS version from Alexanderor

What you need

Print list

Toolhead

• 1x SB (hotend name) cutting Printhead back
• 1x SB (hotend name) cutting Printhead front
• 1x SB Main body Cutting with ECAS (or with sensor)
• 1x SB latch ECAS
• 1x Cutting arm
• 1x Knife holder

Cutting point on gantry

• 2x 2020 25mm corner mount
• tbd. I will design a small guide for the M3x40 Screw (works without as well)

Parts list - considering you already have a Stealthburner with Dragon Hotend

Toolhead:

• Loctite
• 1x M3 nut (DIN934; ideally a countersunk tool to modify the nut for proper filament insertion)
• 2x M3 washer (0.5mm)
• 1x M3x18 SHCS (it repleaces the top left M3x25 SHCS from the SB-Cover mount)
• 2x Voron heat inserts
• 1x M3x18 FHCS (counter sunk screw)
• 1x M3x8 SHCS
• 1x M2.5x16 SHCS (15-18mm works)
• Spring of ballpoint pen (L=15mm; D<=4,5mm) (I've ordered some for testing, to have a "defined" spring)
• Typ 4 Sharp Metall Skalpel (we will cut it to length) Link
• 

Cutting point on gantry

• 40mm 2020 Profile
• 4x M5x10 BHCS
• 4x M5 t-nuts/sliding nuts
• 1x M3x40 SHCS
• 1x M3 t-nut/sliding nut

Assembly

Cutting arm

Cut skalpel to length l=26mm

Result

Insert skalpel into knife holder

Insert the skalpel (which is cut to 26mm) into the knife holder until you see it in the little hole. Use pliers to push it into the knife holder. Some force should be needed as the skalpel should stay in place due to the "pressfit". If that's not the case add some glue.(Depelding on skalpel tolerances)

Put knife holder into cutting arm

The M2.5x15 screw is directly screwed into the plastic of the knife holder. The tip of the screw should be flush with the cutting arm or no more than 0.1-0.3mm above it. Check the orientation of the hole for the M2.5 screw in the knife holder. It needs to be on the bottom side.

!! The knife holder must move up and down without friction in the cutting arm but shoult not have a lot play. Maybe some grinding is needed. !!

Add heat inserts

Main body

SB cutting Printhead back

I need some time to finalize assembly instructions. If you have questions you'll find me in discord "sorted#8941"

Code

!! I AM OPEN FOR ANY SUGGESTIONS OF IMPROVEMENT TO THIS CODE !!

thisiscam has created the ercf_additional.cfg which, once you include it in your printer.cfg should do the work and the modification of the ercf_software.cfg listed below is no longer needed. As I am currently rebuilding my ERCF this is untested by me and thisiscam already announced an update :)

-> For know I will leave the code below as information.

I use Happy Hare with my ERCF. So I only tested it with this code. On your running ERCF config you'll need to modify the "_ERCF_FORM_TIP_STANDALONE" macro in your "ercf_software.cfg"

As I am still testing I am really open for improvements of the Code. As I have no drag chain due to canbus the best position for me was in the back of my printer. If you use a drag chain you maybe need to adjust the gcode below to avoid any collision with your drag chain.

In the Machine start g-Code you need to add this (i a separate line)

ERCF_CHANGE_TOOL TOOL={initial_tool} STANDALONE=1 

Modification of "ercf_software.cfg"

We will use the STANDALONE=1 mode and repleace the tip forming macro. So set the

variable_standalone = 1 # 0 slicer, 1 Happy Hare macro (turn off in slicer)

Adjustment of the Tip Forming macro

########################################################################
# Standalone Tip Forming (for rapid tuning of Slicer values)
########################################################################
[gcode_macro _ERCF_FORM_TIP_STANDALONE]
gcode:
    G92 E0
    G1 E-35 F3000         #Retraced before the cut based on your hotend. This is working for Dragon HF
    G1 X50 Y357 F5000     #Start position for the cutting procedure based on your position of the cutting point
    G1 X0 Y357 F2000      #Cut position for the cutting procedure based on your position of the cutting point
    G1 X50 Y357 F7000     #Return to starting point of cutting procedure
    G92 E0
    G1 E-80 F3000         #Retract filament out of your extruder. Based on your setup
    G92 E0
    G90