BTT EBB SB2209 USB PCB for Stealthburner w/ Harness and Connectors - Complete

Excellent USB tool head board (with a couple of caveats). Seriously, it's just about perfect for a Stealth Burner.

Migrating from an EBB36 to this board was a treat. The way it breaks apart makes sense with how the Stealth Burner goes together. It really makes it much easier to take apart and maintain. It is also compact enough to avoid bumping the z cable chain when the tool head is against the back of the enclosure. I'm excited to see how it behaves in the long term.

My only gripes:
- ***DOES NOT COME WITH MAX31865***. The BTT manual, schematics, and sample .cfg files all show support for PT100/PT1000 RTD's via a MAX31865 IC. In reality, these spots on the PCB are blank and unpopulated. Not a deal-breaker for me, but a bit of a bait and switch by BTT if you're into that kind of thing. Hopefully it'll be there in a future release.
- The connector for the thermistor is a little tight against the stealthburner door. Even with the custom door you print, it's still tight.
- Can be a little tough to get into Bootsel ("DFU" in the manual) mode.

The board and setup are good. BTT makes solid products. However, they went and put a connector on the back of the board that needs to be accommodated for. It doesn't work with any standard stealth burner parts, as it runs into the body of the extruder. It also impedes the ability to run dual filament sensors in something like the filametrix. Difficult for those who want to run MMUs. Other than that, it's a great option for those who don't want to fuss with CAN.

I purchased directly from the supplier before it became available via West3D. These boards are theoretically very solid, but they are fraught with issues that compel me to warn you to at the very least read into the problems that many of us have had.

The gist is that these boards allegedly suffer from extremely sensitivity to static build up during printing due to the triboelectric effect, which causes a variety of shutdown error messages related to the stepper drivers. BTT claims that the issue can be resolved by attaching a grounding wire to the extruder stepper motor, by in my experience (reportedly the same for many other users), this does not help. I had to purchase a replacement board, made several hair pulling hardware changes (filtered inlet, new PSU, etc) before I was able to go more than an hour without a random shutdown. The response by BTT to user issues speaks for itself.

Finding the correct print setup to properly house these boards is tricky, even for the standard stealthburner. They require additional cooling to not shutdown due to thermal overload under the conditions needed to reliably print ABS or ASA in an enclosed environment.

These boards, are otherwise, pleasant too work with. Wiring is easy, they are full of functionality. Issues notwithstanding, this has the makings of an ideal toolhead board.

Unless a new revision addresses the communication issues / triboelectric effect issues, etc. I would avoid this board.