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Here are instructions for uploading the latest Repetrel software and associated applications (EcoSystem Apps):

Repetrel Download button.png

  • As of 01 Mar 2017, the latest v2.x full version is 2.855

The Repetrel download will install the Repetrel software (release 2.855) as well as the firmware for your 407 Motion Controller and your 103 Print Head and Hot Bed Controllers. This install must be carried out per the instructions below, so that Repetrel and its dependent resources will be found in the expected locations.

A video giving a quick overview is available at:

A video showing the actual upgrade process is available at:

On new (clean) installs, you MUST run Slic3r.exe BEFORE launching Repetrel. Configure it to run in expert mode, then exit.

Installing Repetrel

  1. Download (as of 1 Mar 2017). This contains:
    1. Repetrel 2.855
    2. 407 Motion Controller firmware 2.415 (reports back as 2.414)
    3. 103 PH/HB Controller firmware (see next table)
  2. Extract the contents
  3. Rename previous C:/repetrel to C:/repetrel.old (or similar)
  4. Move your extracted repetrel directory to C:/repetrel

Software upgrade complete. Occasionally a user will have to point existing shortcuts to the new executible, C:/repetrel/bin/repetrel.exe

Click here to watch a video of the software upgrade process.

Click here to watch a video of the 407 Motion Controller Firmware upgrade process.

Click here to watch a video of the 103 HotHead/HotBed Controller Firmware upgrade process.

Upgrading the Binaries (bin folder) Only

Note: Only valid when upgrading within the SAME main number (v2.x, or v3.x, or v4.x).

  • As of 26 Jul 2016, the latest v2.x bin version is 2.865
  • As of 20 Feb 2018, the latest v3.x bin version is 3.065B - DO NOT install this directory unless you are already on version 3.x!
  1. Navigate to C:\Repetrel
  2. Rename the bin directory to bin_(old_version_number)
  3. Download the current bin folder.
  4. Extract using WinRAR
  5. Copy the new bin folder to C:\Repetrel\bin
  6. Execute Repetrel.exe (your shortcut should still work).

Firmware Download button.png

Versions 2.415 and 33/35, * with Spindle Tool firmware, as of 10 May 2017

Flashing Firmware

New software will often require new firmware. The latest firmware as of 1 Mar 2017 is part of the Repetrel download, above. However, if you only need to upgrade your firmware, download from:

Video instructions for flashing the 103 (HH/HB) Controllers:

Video instructions for flashing the 407 Motion Controller:

Clench Valves require the primary head to have firmware 49V installed, so that the clench valve is activated (instead of primes/unprimes). Download and flash per instructions above.

Firmware Versions

Please note that equipment shipped since early 2015 should only require these three four:

_FILAMENTS_33A.hex - for all MK-series heads
_TUBES_35.hex - for all emulsion heads
_LASER_234.hex - for the 808nm and 450nm lasers
_DrillMill_2.3.hex - for the ST1 spindle tool (single phase)
_hydra407rev2.415.dfu - for the STM407 motion controller

Older equipment may require older firmware as follows:

First, determine if your STM103 board is a legacy board (with a jumper, circa 2014), or a standard, current board (without a jumper):


If your 103 board (printhead or hotbed controller) HAS a jumper, you will use the following:

File Name swVersion
OLD_JUMPERS_232J.hex 232J

The vast majority of 103 boards do NOT have jumpers. To determine if you require firmware for new, sliver RTDs or older, red RTDs, consult these images:


First check to see if your component has an RTD for temperature control - and if it does, is it red or silver (platinum). Then consult the following table:

Current PrintHead and HotBed Controller Firmware Versions
Controller File Name swVersion
RED (or NO) RTD:
HotBed, MK1-250, Quiet Storm
Spindle Tool
MK1-450, MK1-250, MK2-250
Laser Tool
LASER_234.hex  ?
KRA_35.hex 35K

Please note that the legacy boards with jumpers have not shipped since mid 2014, so most people will never encounter them.

Installing Drivers

If, for some reason, you re-OSed or re-imaged your PC, or are installing on a new PC (or your local IT people made some changes preventing you from connecting to the printer), you will need to ensure that the proper drivers are in place. AFTER you have done the install above:

1. Run: C:\repetrel\ST-LINK Utility\Windows 8 Compatibility Resolver.bat

2. Right-Click and RUN AS ADMINISTRATOR: C:\repetrel\DfuSe\Driver\dpinst_x86.exe (or other appropriate file if on another architecture); Click to ALLOW this program to run.

Now, in Devices and Printers, you should see the FT232R USB UART without any alert icon. Congratulations!

Installing on Another Computer

We run the current Repetrel on Windows 7, 8 and 10 on both Intel and AMD processors; however, you may not be able to run the printer from every unique environment possible. Please know that we cannot help troubleshoot every unique environment - this is why we include a full Tablet PC with each printer. These instructions work for most external installs:

  1. Install Repetrel, as above (no old folder to rename).
  2. Install Drivers, as above.
  3. Install Ecosystem Apps, as below.
  4. Navigate to C:\EcosystemApps\Slic3r\slic3r.exe and execute it from the windows browser BEFORE LAUNCHING Repetrel.
    1. Go to File > Preferences and set the Mode to Expert, check all four boxes, and click OK. Then close Slic3r and launch Repetrel.

My Unit Shipped with a Tablet

1. Don't worry about ever powering up the tablet - you can remove it. We just want the 3.3v, 5v and 12v power and USB connectivity to the spine and beyond.

2. Install the software as shown at Repetrel above, and Ecosystem Apps below.

3. Install the drivers as shown at Drivers above.

4. Unplug the cables for the tablet USB connectivity and install PC Jumpers as shown:

USB: Tablet Interface Board Changes for USBB Control

5. Run a USB A to B cable from your PC to the USB-B port on the left side of the Printer:

USB: Left side of Printer

My Unit Shipped with a Motherboard

1. Don't worry about ever powering up the motherboard. We just want the 3.3v, 5v and 12v power to the spine and beyond.

2. Install the software as shown at Repetrel above, and Ecosystem Apps below.

3. Install the drivers as shown at Drivers above.

4. Run a USB to MiniUSB cable from your PC to the MiniUSB port on the right side of the Spine:

USB: Lower Right Spine

5. Run a USB to MiniUSB cable from your PC to the MiniUSB port on the top, inside of the Spine:

USB: Top Inside Spine

Recipes Download button.png

This package contains current basic recipes for 0.5mm nozzles, 1.5mm nozzles, and 14# (1.6mm) nozzles, as of March 2017.

The contents of the print, printer, and filament folders should be copied to C:\Users\Hyrel\AppData\Roaming\Slic3r\ in the print, printer, and filament folders, respectively.

Winrar can be downloaded from

Ecosystem Apps Download button.png

Ecosystem Apps is a suite of publicly available programs which add many features at no cost. Some of them you might use individually to create or modify models. Others might be called from Repetrel to manipulate a file. This install should all be carried out per the instructions below, so that Repetrel will find them in the expected locations.

Installing Ecosystem Apps

  1. Download - see table below for the list of programs and their proper locations.
  2. Run the executable, with the location pointed to C:
  3. Launch Repetrel, go to the Programs tab, and double click in each text field, pointing the applications to their respective executable files under C:/EcosystemApps. See the table below for the proper locations. Note the new location for the Slic3r install; Slic3r Recipes (or Slic3r CFG files) should still be under C:\Users\Hyrel\AppData\Roaming\Slic3r.
EcosystemApps Locations
Program Name Executable Location
Slic3r EXE C:\EcosystemApps\Slic3r\slic3r.exe
Slic3r CFG C:\Users\Hyrel\AppData\Roaming\Slic3r
OpenSCAD C:\EcosystemApps\OpenSCAD\openscad.exe
FreeCAD C:\EcosystemApps\FreeCAD 0.15\bin\FreeCAD.exe
MeshLab C:\EcosystemApps\VCG\MeshLab\meshlab_32.exe
FlatCAM C:\EcosystemApps\FlatCAM\FlatCAM.exe
QCAD C:\EcosystemApps\QCAD\qcad.exe
TeamViewer C:\EcosystemApps\TeamViewer\Version9\TeamViewer.exe
InkScape C:\EcosystemApps\inkscape\inkscape.exe
GIMP C:\EcosystemApps\GIMP 2\bin\gimp-2.8.exe

Installing New Slic3r Recipes

Download the recipes here

Air Filter Bracket

Customer exforma23 has made this file available for users to mount their air filters. Thanks exforma23!

Teamviewer Version 9

The link can be hard to find on the teamviewwer website, so here it is for you: