Firmware
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New software will often require new firmware. New software packages always come with the latest firmware at the time the software was released; however, sometimes newer firmware is available.
There are two families of firmware; one for the heads, or STM-103 boards, and another for the motion controllers, or STM-427 / STM-407 boards.
Download
Firmware 
Versions 2.415 and 33/35, * with Spindle Tool firmware, as of 10 May 2017
Print Head / Hot Bed Firmware
For the STM-103 Boards.
Video instructions for flashing the 103 (HH/HB) Controllers: https://youtu.be/yM8QMZBTb4o
| Filament Heads | Firmware |
|---|---|
| MK1-250 | _FIL_250_PLAT_1A.hex |
| MK1-250 with red RTDs (from 2013, 2014) | _FIL_250_RED_235A.hex |
| MK2-250 | _FIL_250_PLAT_1A.hex |
| MK1-450 | _FIL_450_45A.hex |
| Emulsion-Type Heads | Firmware |
| All Emulsion-type Heads (including mixing heads) | _TUBES_35K.hex |
| With COD or Clench Valve tied to Printing Moves Only | _TUBES_49V.hex |
| Laser Heads | Firmware |
| Diode Lasers on Repetrel v2.x | _LASER_R2_234.hex |
| Diode and CO2 Lasers on Repetrel v3.x | _LASER_R3_PWM_6L.hex |
| Spindle Tools | Firmware |
| Spindle Tools (1- and 3- Phase) | _DrillMill_2.3.hex |
| Inkjet Heads | Firmware |
| Inkjet Headss (Heat- and Piezo- based) | _INKJET_6E.hex |
Motion Controller Firmware
For the STM-429 and STM-407 Boards
Video instructions for flashing the 103 (HH/HB) Controllers: https://youtu.be/yM8QMZBTb4o
| Printer Model | Repetrel Version | Firmware |
|---|---|---|
| All Hydra Models (3-, 4- and 5- axis) | Repetrel 3.07x | Hydra 3.07x |
| Engine, High Resolution | Repetrel 3.07x | Hydra 3.07x |
| System 30M (and earlier Systems) | Repetrel 3.07x | Hyrel 3.07x |
| Repetrel 2.865 | Version 2.414 | |
| Engine, Standard Resolution | Repetrel 3.07x | Hyrel 3.07x |
| Repetrel 2.865 | Version 2.414 |