4.4 KiB
sorted's Filametrix Mod
This is a mod of the Voron Stealthburner which adds a filament cutting possibility!
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.
https://youtube.com/shorts/HOMG8cVk_U4 https://youtu.be/tTcrxttyths
Good to know
Please be aware:
!! THIS IS A WORK IN PROGRESS !!
After my holiday trip I will mount the toolhead for another proof of concept in the printer. Once this is done I would appreciate if someone with an working ERCF unit could check it.
- 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
- I designed it for main body without tool head sensor as I am planning to go with Happy Hare
- Depending on the setup and position of the cutting point we will most probably not lose any build volume
- Currently the design is only available for the Dragon hotend
- As my ERCF is under construction I tested it with roughly 100 cuts by hand not seeing any wear or fatigue
- For the main body i remixed the ECAS version from Alexanderor
What you need
Print list
- 1x SB Dragon cutting Printhead back
- 1x SB Dragon cutting Printhead front
- 1x SB Main body Cutting with ECAS
- 1x Cutting arm
- 1x Knife holder
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
- tbd...
- ...
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. !!