A daughter board that mounts on a 3D printer hotend assembly to enable all wiring over RJ45Designed by On-Prem 株式会社 in Japan
This product is no longer available for sale. The seller may be offering an improved version or it may be hanging out on the beach, enjoying the retired life.
Notice Note: This is the last batch for the foreseeable future. Once the stock runs out, we will not sell this kit or produce more PCBs. Updated Nov 21, 2021: v.2 now supports hotend heater cartridge…Read More…
Note: This is the last batch for the foreseeable future. Once the stock runs out, we will not sell this kit or produce more PCBs.
Updated Nov 21, 2021: v.2 now supports hotend heater cartridge, thermistor, and PWM fan.
Update Nov 25, 2021: We are not including JST-XH connectors in the kit anymore. Sorry for the inconvenience.
Update Dec 8, 2021: We are out of stock! Thank you!! Please feel free to download the gerbers.zip from the GitHub repository Assets, and upload them to JLCPCB. It'll cost less money but you'll need to source the RJ45 and JST connectors on your own.
This module is designed specifically as an addon for the EVA 2 3D project which enables modular 3D printer hotend assemblies using standard adapters and 3D printed parts.
It is for low current electronics such as fans, accelerometer, e-step motor, and high current electronics such as heater cartridge and thermistor.
The board measures 80mm x 41mm, lead-free and RoHS compliant, and is designed to be mounted through grounded M3 holes.
This project is certified open hardware:
Rather than wiring all devices directly from the 3D printer electronics panel to the hotend assembly, this module allows you to connect two simple RJ45 wires between them, and then wire the devices directly using the JST-XH / JST-VH connectors. One module mounts to the hotend, the other mounts on the electronics panel.
It then makes it simple to swap out a hotend without rewiring everything. It significantly cleans up the wiring and reduces maintenance and upgrading headache.
Note: this module was originally designed to lay flat with 40x40mm dimensions, but a similar project by "Minty Trebor" on The RatRig Discord chat inspired me to alter the design.
One full kit (PCB and RJ45 and JST-VH connectors for 1 module) ships with the following components, orders for a pair contain double the components listed below:
|6||2-pin JST-VH male and female headers (12pcs)||datasheet||B2P-VH-FB-B|
|12||JST-VH sockets for crimping|
|1||Printed schematic, instructions, and wiring diagram|
The kit does not supply JST-XH connectors, RJ45 cables, 3D printed parts, mounting screws, tools, wires, or anything not listed above.
You will need to source your own JST-XH connectors for each PCB:
|2||2-pin JST-XH male and female headers (4pcs)||datasheet||B2B-XH / XHP-2|
|1||4-pin JST-XH male and female headers (2pcs)||B4B-XH / XHP-4|
|1||5-pin JST-XH male and female headers (2pcs)||B5B-XH / XHP-5|
|1||6-pin JST-XH male and female headers (2pcs)||B6B-XH / XHP-6|
|19||JST-XH sockets for crimping||SXH-001T-P0.6|
Please use high-end stranded and shielded 24AWG RJ45 cables for safety and reliability.
Please use 16AWG stranded wiring for crimping to high current JST-VH connectors.
Low current PCB traces are 0.5mm and can support at most 1A of current, although RJ45 wires of 26AWG size are only rated for 350mA per wire, it is not recommended to pull too much current with such thin wires. The PCB does not contain any fuses or diodes to protect wiring or devices.
High current PCB traces are 3mm and can support at most 3.9A of current, and possibly more because the traces are doubled on both sides. High current traces have only been tested up to 2A. Please be warned and use at your own risk.
Do not connect a thermistor, heater cartridge, or high power fan to the low-current JST-XH/RJ45 connectors. It is only designed for low-current devices and you will have a bad day if you decide to pull more than it can handle.
Do not connect anything other than a μ3D module to the RJ45 cables. It does not use any known standard pinouts and will likely destroy any "ethernet" devices you connect (laptops, switches, IP cameras, etc).
The v.2 module is not compatible with v.1 module due to different board layout and design.
We are not responsible for accidents or problems caused by your use or misuse of these modules.
If you outgrow the need for these modules, we will gladly accept returns in order to recycle, refurbish, and reuse the components for future use. In that case we will provide you with a lovely discount on future purchases from our store. Please note, we refuse to recycle modules which are severely damaged, non-functional, or soldered with lead based solder. They will be disposed of and no discount will be provided. Please use lead-free solder even if you don't plan to return the modules when they've reached their end-of-life.
For tracking and logistics, please contact us and wait for approval before making any returns. We may ask for photos of the modules before hand, and we may refuse to accept returns for any reason. Return shipping is paid by the sender and does not require a tracking number for low volumes. You can ship it by boat even if it takes months to reach Japan :) Thank you for understanding.
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