ProTubeVR-MK3S-MMUv2-MOD-FOR-HEMERA

This mod combined with the dedicated Firmware mods allow you to fit an Hemera extruder from E3D on an MK3s using MMUv2 upgrade.

The mount is rotated 30 degrees to allow the full x-axis carriage travel without the need to move the lead screw, motor, etc.

The pinda is in the same location as the original extruder.

-This is a rework of the Hemera Mount kit from DarrinBrunner ( https://www.prusaprinters.org/social/40843-darrinbrunner/prints )

-It's super usefull to use the selector Mod from 78zero to get a more reliable FINDA reading ( https://www.prusaprinters.org/social/2481-78zeros/prints )

This is new a mount to attach an E3D Hemera extruder to a Prusa MK3-MMU2 printer. The original interior geometry from the Prusa filament sensor has been incorporated into this design, sourced from Prusa's models.

The pinda is in the same location as on the original.

The nozzle in this new design sits 10mm further forward along the y-axis (toward the front of the machine), than the original. The x-axis location of the nozzle is the same as the original extruder. The y-axis offset of the nozzle from the pinda needs to be changed from 5 to 15.

You can follow this guide to update the firmware:

https://e3d-online.dozuki.com/Guide/Prusa+i3+MK3+Firmware+Modifications/141

Mounting require M3x8 for the Hemera Motor

Others are common M3x10 and M3x14

Print instructions

Source code and test build are there :

https://github.com/ProTubeVR/MK3s-Hemera-Mod

Mandatory Firmware mods :

Configuration.h

Line18 :

// Firmware version

define FW_VERSION "PTVRv0.1_3.9.3"

// BASED ON PRUSA Stock FW 3.9.3

// https://github.com/vertigo235/Build-Prusa-LA-15

define FW_COMMIT_NR 2500

// FW_VERSION_UNKNOWN means this is an unofficial build.

// The firmware should only be checked into github with this symbol.

define FW_DEV_VERSION FW_VERSION_RC

define FW_REPOSITORY "ProTubeVR"

define FW_VERSION_FULL FW_VERSION "-" STR(FW_COMMIT_NR)

Config.h

define LANG_MODE 0 // primary language only (Hemera mod, from E3D Tuto)

//#define LANG_MODE 1 // sec. language support (Hemera mod, from E3D Tuto)

configuration_prusa.h

Line22 :

define NOZZLE_TYPE "E3D_Hemera" // Hemera

// Developer flag

define DEVELOPER

// Printer name

define CUSTOM_MENDEL_NAME "ProTubeVR Hemera MK3s" //Hemera

**Line42:

// Extruder