Basic Information: Printer Model: Voron 2.4 MCU / Printerboard: BTT Octopus Max EZ Host / SBC: x86 desktop computer with AMD A10-4655M APU, 4 cores, 16GB RAM klippy.log klippy.log (478.9 KB) Fill out above information and in all cases attach your klippy.log file (use zip to compress it, if…

Yesterday I got the EBB SB2209 USB V1.0 and it works like a charm. For now I don’t have any issue with this part. What I find interesting, the EBB 36 CAN works on four printers we (dad and I) have without any issues. Maybe the EBB SB2209 CAN has many bad batches.

Good find man, I check the post and it is fairly similar to my issue. I am just confused that it happens now but used to work for so long. But on the other hand, my dad has similar issues (he has basically the same Voron). The capacitor would probably work, would it work connecting the powerlines di…

It was my post about “New Voron instance lost communication with EBB (can bus)“. I printed over 200hours without any problem after adding capacitor. But. Problem is back - a week ago I found every print finishes with EBB lost communication. I replaced PSU, added one more capacitor, grounded motor a…

Dang, do happen to have a solution at hand or an idea what could be the culprit? You said swapping “everything” didn’t help, but maybe you have another idea. Also, what hotend are you using with which wattage?

[image] DerKnerd: Also, what hotend are you using with which wattage? This might be the right question. Often the CANbus cables are not the thickest ones and with a powerful hotend there might be voltage/current issues. On the other hand solder joints and connectors can behave different und…

Sorry. Hotend was last thing I tried to change. My original hotend was 70w and I changed it to 40w revo two days ago… No luck - print stopped after 37mins. Currently I plan to try some kind of esp32-based voltage logger (2 channel) - to log voltage 10-30 rounds per second on sdcard. I just want to …

Currently I have only one can device connected. I added a “hub” with 3 sockets to connect toolheads, but stuck with connection loses. Hub is connected to PSU using 2.5mm2 wires (shielded) and has three 470uf capacitors near every socket.

[image] regressor: I added a “hub” with 3 sockets to connect toolheads I had that discussion recently with @mykepredko while I was looking for a proper way to connect several extruder boards using CAN. CAN is meant to daisy chain its components on a single line/bus. The specs allow short st…

I only use one CAN device (the EBBCan 2209) and a Phaetus Rapido V2 hotend. The cable is the original BTT one. I trimmed it a bit to fit better in my printer.

Welcome back DerKnerd, why don’t you start a root cause analysis of the problem. [image] DerKnerd: I tried to print something with my Voron 2.4. But for a reason, I cannot get behind, it fails with the BTT EBBCan losing connection. Back in 22nd of August it worked flawless and printed properly…

EBBCan loses connection randomly

General Discussion

nefelim4ag November 2, 2025, 9:35pm 2

From the log, it is what it is. Messages can’t be delivered to the EBB.

I guess this thread can assist you to some degree: New Voron instance lost communication with EBB (can bus)

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EBBCan loses connection randomly

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