VORON ERCF v2 User manual

We build space shuttles with gardening tools
so anyone can have a space shuttle of their own.
VERSION 2023-11-21
ERCF v2 BUILD GUIDE
COMMUNITY EDITION

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Before you begin on your journey, a word of caution.
This machine can maim, burn, and electrocute you if you are not careful.
Please do not become the first VORON fatality.
There is no special Reddit flair for that.
Please, read the entire manual before you start assembly.
As you begin wrenching, please check our Discord channels for
any tips and questions that may halt your progress.
Most of all, good luck!
The VORON Team
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ERCF v2

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ERCF v2
Introduction 10
Wiring 18
Gearbox 24
Filament Blocks 52
End Block 71
Selector 79
Encoder 94
Linear Axis 103
Final Assembly 113
CottonTail Buffer 127
TABLE OF CONTENTS

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PART PRINTING GUIDELINES
The Voron Team has provided the following print guidelines for you to follow in order to have the best chance at success with
your parts. There are often questions about substituting materials or changing printing standards, but we recommend you
follow these.
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INTRODUCTION
FDM MATERIAL
The ERCF was tested only with ABS, so I
recommend to use ABS to build the ERCF.
INFILL TYPE
Grid, Gyroid, Honeycomb, Triangle or Cubic.
MATERIAL
The ERCF was tested only with ABS, so I
recommend to use ABS to build th
INFILL PERCENTAGE
Recommended: 40%
LAYER HEIGHT
Recommended : 0.2mm
WALL COUNT
Recommended : 4
EXTRUSION WIDTH
Recommended : Forced 0.4mm
SOLID TOP/BOTTOM LAYERS
Recommended : 5
Beware that this project requires a well tuned printer and slicing profile, as there are many press fits and plastic on plastic
mechanisms. You should first print the ERCF_Calibration_Tool.stl, test the part, as shown in the manual, tune your printer and
profile if needed, and then only print the rest of the parts.
PRINT GUIDELINES

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FILE NAMING
By this time you should have already downloaded our STL files from the Voron GitHub. You might have noticed that we have
used a unique naming convention for the files. This is how to use them.
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PRIMARY COLOR
Example End_Bypass.stl
These files will have nothing at the
start of the filename.
ACCENT COLOR
Example [a]_End_Bypass_Foot.stl
These files have an ‘’[a]_’’ prefix to
denote that they should be printed
with an accent color.
QUANTITY REQUIRED
Example Filament_Path_xN.stl
Files ending with ‘’_x#’’ are telling
you the quantity of that part required
to build this system. For the ERCF,
‘’N’’ means the number of channels.
COLOR REQUIRED
Example
[c]_Cover_Lens_xN.stl
These files have a ‘’[c]’’prefix to
denote that they need to be printed in
a clear/transparent material.
COLOR REQUIRED
Example
[o]_Encoder_Slotted_Wheel.stl
These files have an ‘’[o]’’prefix to
denote that they need to be printed in
an opaque material light can’t
penetrate, preferably black.
OPTIONAL MULTIMATERIAL
Example
[mm]_Voron_Logo_Plate.stl †
These files have a ‘’[mm]’’prefix to
denote that they should be printed in
multiple colors. We always include
single-color versions of these files
too, for your first build.
INTRODUCTION STL FILE KEY

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INTRODUCTION HARDWARE REFERENCE
BUTTON HEAD CAP SCREW (BHCS)
Metric fastener with a domed shape head
and hex drive. Most commonly found in
locations where M5 fasteners are used.
ISO 7380-1
SOCKET HEAD CAP SCREW (SHCS)
Metric fastener with a cylindrical head
and hex drive. The most common
fastener used on the ERCF.
ISO 4762
FLAT HEAD COUNTERSUNK SCREW
(FHCS)
Metric fastener with a cone shaped head
and a flat top.
ISO 10642
SELF TAPPING SCREW
Fastener with a pronounced thread
profile that is screwed directly into
plastic.
HEX NUT
Hex nuts couple with bolts to create a
tight, secure joint. You’ll see these used
in both M3 and M5 variants throughout
this guide.
ISO 4032
MAGNETS
How do they work?
These are cylinders 6mm in diameter
and 3 mm tall. Shorter ones are OK,
down to 2.7 mm. N52 are preferred, but
N35 can work.
POST INSTALL T-SLOT NUT (T-NUT)
Nut that can be inserted into the slot of
an aluminium 2020 profile.
Often also called “roll-in t-nut.”
HAMMERHEAD NUT
Nut that can be inserted into the slot of
an aluminium profile. Used exclusively
for panel mounting, all other
components use T-Slot nuts.

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INTRODUCTION HARDWARE REFERENCE
625 BEARING
A ball bearing used on the Voron Z
drives.
WASHER
Metric fastener with a domed shape head
and hex drive. Most commonly found in
locations where M5 fasteners are used.
ISO 7380-1
PULLEY
GT2 pulley used on the motion
system of the Voron.
IDLER
GT2 idler used in the motion system of the
Voron.
SET SCREW
Small headless screw with an
internal drive. Used in pulleys and
other gears. Also called a grub
screw.
ISO 4026
HEAT SET INSERT
These are made of brass , threaded on the
inside and and has ridges on the outside.
Heat them up to approx 250C with a
soldering iron and push them into the plastic.
As the plastic cools, it solidifies around the
knurls and ridges on the insert for excellent
resistance to both torque and pull-out.
5.5MM BALL BEARING
A ball bearing used in the CottonTail
Buffer.
608 BEARING
A ball bearing used on the ERCT Buffer
(optional),

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INTRODUCTION TOOLS
BALL-END DRIVER
Some parts of this design require the use of a
ball-end hex driver for assembly. We recommend
you get a 2.0mm, 2.5mm and 3mm one.
2.5MM HEX DRIVER
The 2.5mm hex driver will see a lot of use in this
build. A quality driver is strongly recommended.
Refer to the sourcing guide for suggestions.
ADDITIONAL TOOLS
We provide additional tool recommendations in
our sourcing guide. Visit https://vorondesign.com/
sourcing_guide and switch to the “Voron Tools”
tab at the bottom of the page.

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INTRODUCTION TOOLS
SOLDERING IRON
We use this for setting heat-set inserts into parts.
Depending on your sensor choice, you might be
soldering some wires together.
ANGLE GRINDER/DREMEL
If you need to cut your 8mm smooth rods, nothing
less than an angle grinder is going to cut it,
literally. Leave your grandfather’s trusty hacksaw
in the toolbox: rods are usually hardened steel.
VISE
A vise is handy if you have to cut your 8mm rods.
A vise may also be helpful when press-fitting
bearings into the Selector.
WIRING CRIMPER
You’ll need this to wire up the sensor. Or maybe
there’s a turnkey solution out there you can buy,
check Discord. If you got this far without learning
how to crimp, we don’t judge.
CAD SOFTWARE
ERCF_v2/CAD/ERCF_V2.0.step
Software is a tool too! The CAD file for the
ERCFv2 was designed to be used along with this
manual as a supplement or reference, even if you
aren’t a CAD Pro. You can use the free edition of
Fusion360, or your choice of CAD program such
as TinkerCAD or FreeCAD.
SUPERGLUE
Yes, we consider this a tool. Superglue is useful as
a plastic safe threadlock, and magnet glue. Cheap,
single-use gel tubes are fine.
PULLEY TOOLS
ERCF_v2\Stls\Tools\Pulley_Tool_NEMA14.stl
ERCF_v2\Stls\Tools\Pulley_Tool_NEMA17.stl
These take the guesswork out of setting your
pulley heights. You will always need the NEMA17
version, but you only need the NEMA14 version if
you’re using the NEMA14 drive motor.
80T GEAR WHEEL GUIDE
ERCF_v2\Stls\Tools\80T_Cog_Guide.stl
This tool helps you align your printed 80T gear
when you are assembling it.
SLOTTED WHEEL PUSH TOOL
ERCF_v2\Stls\Tools\Slotted_Wheel_Push_Tool.stl
Helps you set the depth and align the Encoder
slotted wheel without damaging it.
FILAMENT BLOCK BEARING INSTALL TOOL
ERCF_v2\Stls\Tools\Bearing_Install_Tool.stl
This optional tool helps you install MR85ZZ
bearings into the Filament Blocks without
damaging the bearings.
PRINTED PART TRACKER SPREADSHEET
There is a helpful interactive Printed Part Tracker
for ERCFv2 here:
Printed Parts Tracker Google Sheet

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This project aims to bring multi material capabilities to 3D printers using a single Direct Drive toolhead. While this project is
mainly designed to be used on VORON printers, it can also be used (or adapted) on any 3D printer that runs Klipper.
Find all the project information on the Github page : https://github.com/Enraged-Rabbit-Community/ERCF_v2
The project is composed of 5 different components, some of which are optional:
●Enraged Rabbit Carrot Feeder (ERCF). The Carrot Feeder is the main unit and allows use of a high number of different
filaments (tested up to 14 tools but test team) and feed them, one at a time, into the printer toolhead on an as-needed
basis.
●Enraged Rabbit Cottontail (ERCT) is a new integrated (but optional) filament buffer system to handle the filament when
it is ejected from ERCF on a tool change. It can handle up to 1.5m bowden tube lengths. This has been specifically
designed to minimize friction when setup in accordance with this manual which takes into account the natural filament
memory. It has options for LED gate indicators and entry sensors.
●Enraged Rabbit Filametrix (ERF): This filament cutter is an optional toolhead modification to cleanly cut the tip of the
ejected filament, so it can be loaded easily on next use. This option alleviates the frustrating job of tuning tip formation
through movement of the filament within the extruder, which often still results in strings of filament causing clogs.
●Toolhead Sensor: This is a set of modifications for popular extruders that provides filament detection capability within
the toolhead. Although optional, it is highly recommended, and makes filament change far more reliable and smooth.
●Happy Hare Firmware: This has become the go-to extension to Klipper for controlling various types of MMU. It is
optimized to support ERCF.
●(Future) Enraged Rabbit Pellet Purge (ERPP): Envisioned, but currently unavailable, this will alleviate the need for a
purge tower meaning more room for your prints. Stay tuned.
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INTRODUCTION THE ENRAGED RABBIT PROJECT