Addon Feature Setup

Page Sections:

• EREC
• Blobifer
• DC eSpooler
• Eject Buttons

This directory contains possible addons for your MMU setup that have support shipped with Happy Hare

EREC Filament Cutter

An addon used to control filament cutting at the MMU rather than the toolhead

Compatibility

MMU: ERCFv2 (but many variants exist and this will work with any servo controlled MMU filament cutter)
Printer: Any

Github

https://github.com/kevinakasam/ERCF_Filament_Cutter

Config

1. Add [include mmu/addons/mmu_erec_cutter.cfg] to your printer.cfg
2. Edit mmu_erec_cutter.cfg and mmu_erec_cutter_hw.cfg to work with your setup
3. In mmu_macro_vars.cfg set variable_user_post_unload_extension : "EREC_CUTTER_ACTION"

---

Blobifier

An addon used to create purge blobs instead of using a wipe tower

Compatibility

MMU: Any
Printer: Voron v2, others in the works

Github

https://github.com/Dendrowen/Blobifier

Config

1. Add [include mmu/addons/blobifier.cfg] to your printer.cfg
2. Edit blobifier.cfg and blobifier_hw.cfg to work with your setup
3. Set purge_macro: "BLOBIFIER" in mmu_parameters.cfg
4. Optionally set variable_user_post_form_tip_extension : "BLOBIFIER_PARK" in mmu_macro_vars.cfg to park the nozzle on the tray during a swap. Note that it is always recommended that you at least z-hop on toolchange so that the toolhead is immediately lifted off the print. Read Toolchange Movement for more details. NOTE: this method has been superceeded and understanding the "parking" configuration in mmu_macro_vars.cfg is the better method.

---

DC eSpooler

An addon used to control a DC motor based eSpooler that is active when the MMU is unloaded

Compatibility

MMU: Any
Printer: Any

Github

n/a

Config

1. Add [include mmu/addons/dc_espooler.cfg] to your printer.cfg
2. Set espooler_start_macro: MMU_ESPOOLER_START in mmu_parameters.cfg to start eSpooler movement
3. Set espooler_stopt_macro: MMU_ESPOOLER_STOP in mmu_parameters.cfg to stop eSspooler movement
4. Update the mmu/addon/dc_espooler_hw.cfg for your configuration.

---

Eject Buttons

If the MMU is equipped with a per-gate eject button (like QuattroBox) this addon is used for control

Compatibility

MMU: Any (if buttons fitted)
Printer: Any

Github

n/a

Config

1. Add [include mmu/addons/mmu_eject_buttons.cfg] to your printer.cfg
2. Ensure the eject button pins are defined:
3. Add EJECT_BUTTON_x aliases to mmu.cfg or define pins directly in mmu_eject_buttons_hw.cfg

---

Important

For all add-on extensions, ensure that you always use the "cfg" files from Happy Hare and not those sourced elsewhere so you have the most recent changes and fixes.