- BIGTREETECH EBB42 CAN Bus with MAX31865 Adapter Board Hot End PCB Board Filament Break Blockage Detection for 42 Stepper Motor Extruder Nozzle Head Tool for Blv Ender 3 for Klipper Support PT1000

Great little board. Used on a Sovol sv08 to convert to Can communication. Connectors used on this board are 2.5 pitch which makes a whole lot of difference with ease when comparing to the 1.5 pitch on the Sovol stock board. Easier to crimp in case you pull out a wire when disconnecting a connector and way easier to crimp. Simple installation when following the manual on the btt GitHub page. Though, having some experience connecting to your printer host via ssh and using the Linux command line helps. The heater terminals are also larger than the ebb36 board which also makes it easier to install the heater wires and using ferrule connectors. Using the board to connect an eddy dual, x endstop, filament sensor, extruder fan, two part cooling fans spit into one connection, neopixel leds, heater, and thermistor. Still have a few pins to use if something comes to mind. Good buy.

what a fantastic board and idea! this thing saves so many wires and is abundantly capable

I had to redo the wiring on my Ender 3 after making some major upgrades - moved to direct drive from a remote feed system, including an Orbiter - and had some REALLY long wire runs back to my control boards. I run Klipper so the option of using only four wires to bring all my hot end controls back to my Raspberry Pi sounded great. I mounted this on a point behind my print head as the board will not fit on the back of the NEMA14 motor like it would on a NEMA17. It did take a bit of programming work to get the CANBus set up in my printer config but now it is controlling the following: two fans, extruder motor, extruder heater, BLTouch, hotend LED and filament runout sensor.

When I bought this board, I anticipated slapping it on the back of my Ender 5 direct drive extruder. Went on seamlessly (I used a 4 wire 42mm Nema 17). Only buy this product if you are proficient in wire crimping and wire connections. Uses several types and sizes of connectors to be prepared or else you might crimp wires with the wrong size prongs. Setup was seamless and worked well with my Skr E3 mini v3, rasp pi 3b+ and Btt CAN to Usb adapter. Generally speaking, great product, learning curve to the electrical installation.

Great replacement for the one i kinda blew up by connecting the wrong voltage to it.

**revised** Ok, I finally have it working. There were a few things going on... - If you have another device and it is using usb<->can bridge on another interface, it ends up breaking the discovery on the CAN interface the EBB is on - Once you try to query the status with the flash_can command, it may only show up temporarily. - Resetting the board with reset didn't work with 2 short clicks as set, but needed to be held down for a couple seconds, *THEN* 2 short clicks for the device to show on the CAN bus again - the above instruction was crucial, as just entering DFU mode then back to boot mode via Reset button alone (single or double click) would not put it back in boot mode consistently (and therefore, doesn't show on the CAN BUS) - I Still never got it to FLASH *OVER* CAN bus, but that isn't important for my usage as I can easily just plug the USB back in I know (from reading online forums, and the github) that I'm not the only one who had weird issues, but most of those just said (they kept trying, but it finally worked). The above explains WHY it worked if you just "keep messing with it", and why it seems so intermittent when following the (poorly written) instructions. *now* that I have it working, it seems to work fine from initial setup, but there was really no need for such inconsistent behavior without clear warnings. Same goes for Klipper's instructions for having other devices in USB<->CAN bridge mode as another CAN interface. There is a one sentence warning buried in the middle of a paragraph that it *might* cause issues to other CAN buses on the machine. ** previous review below** I can only see it over USB and can flash the CAN image to the unit, but it won't show up on the CANBUS after flashing. I've tried 2 different CANBUS adapters (one a 2515 based, one cannable/candelight based). I've double checked all connections with a VOM, so I think I got a bad one :( How do I get a warranty replacement?

Still in the process of rebuilding my printer, and still have some wiring to go. However, following the step-by-step instructions by Stacking Layers on YT, I got Klipper installed on my Manta E3EZ board and this EBB42 (note the interface pins are different on the E3EZ from the M8P, but the rest of the instructions are spot on). No communication issues so far. Would highly recommend!

Working great paired with my SKR3 EZ

The Molex pins for the power and ground connector weren’t included. Even more annoying, the documentation doesn’t specify if the connector is a Minifit or Microfit… silly, really. Not a word about the connector anywhere. Of course this is a case of having ordered the board nearly a year ago and just now getting into this project.