EBB Side Mount for SV06/Plus

PRELIMINARY DESIGN – FOR TESTING ONLY – REQUIRES KLIPPER

INTRO:

When moving your printer into an enclosure, it is a very good idea to remove the MCU mainboard enclosure from the printer and place it outside.  The toolhead ribbon cable on the SV06/Plus is too short for this.  

This mod solves that problem by mounting a BTT EBB42 or EBB36 toolhead board on the vertical extrusion.  The ribbon cable connectors can be terminated at the EBB and a USB cable connects the EBB to the Klipper host.

No modification to the toolhead should be necessary.  

This mod also gives us an extra stepper motor driver, allowing a dual Z driver setup.  

PRINTED PARTS:

PLA is not recommended for parts used inside an enclosure.  

The provided models fit the left side of the printer.  If you want to mount on the right side instead, mirror the model in your slicer.  

HARDWARE:

A Big Tree Tech EBB42 (recommended) or EBB36 toolhead board.  

A cable crimper.  

1 x M4 screw (into MCU enclosure mount hole)

2 x M5 screws and t-slot nuts 

6 x or 8 x M3 screws and nuts

WIRING:

We are using USB, not CAN.  Power and USB will be separate cables.  I do not recommend making a hybrid all-in-one USB-signal / 24V power cable.  

POWER:  You will very likely need to crimp pins for the power connector.  The EBB42 uses the same type of connector as Personal Computer Power Supplies, so if you do not own a crimper you may be able to find a compatible cable.  

If you are also installing the bed MOSFET mod, you should be able to connect a pair of conductors to the power input port on the MOSFET board to power the EBB.  

USB:  Connect the EBB board to the Klipper host (usually a Raspberry Pi).  Any USBC cable that contains 2 data conductors (aka “charge and sync”) is sufficient.   

If you are using a Raspberry Pi Zero2W, you will also need a USB 2.0 hub.  

You will also connect your MCU mainboard to the Klipper host as usual.  

RIBBON CABLE:  Take note of where the various JST plugs connect before removing them from your MCU mainboard.  Most of them simply need to be plugged into the equivalent jacks on the EBB board.  

The probe plug can be pushed onto the EBB's “BL-Touch” pins.  It is easiest to simply scrape/cut the “key” ridges off of the JST plug so there is no interference.  For the EBB42, the pins are already in the right order.  Reverse all pins for the EBB36.  

KLIPPER CONFIGURATION:

See https://github.com/bigtreetech/EBB for instructions on installing the USB version of Klipper to your board.  

Config snippets can be found in the 3 text files.  

ADXL345:  The EBB boards include a motion sensor chip, normally used for input shaping calibration.  Because we are mounting the board in an unusual configuration, this function will not give valid results.  

THANKS:  Props to u/giveAShot on Reddit for the original idea and for helping test.