Basic Information: Printer Model: Highly customized Anycubic Chiron MCU / Printerboard: BTT Manta M8P v2(mcu), BTT EBB42 v1.2 (EBB_X, EBB_Y, EBB_E) Host / SBC: BTT CB2 klippy.log (9.9 MB) The printer is a testbed printer. The hardware and config changes frequently, but the CAN network failur…

Welcome Bacheshatonee, [image] Bacheshatonee: The Klippy log is too big (38MB). Even zipped?

Digging into the file as far as I am able I see the following as the actual start of the errors where the print fails: mycanlog.log (320.4 KB) Stats 825809.5: gcodein=0 canstat_mcu: bus_state=active rx_error=0 tx_error=0 tx_retries=0 mcu: mcu_awake=0.012 mcu_task_avg=0.000002 mcu_task_stddev=0.00…

[image] Bacheshatonee: mycanlog.log (320.4 KB) Does not help much (000.000000) can0 RX - - 109 [8] 14 1D 70 06 88 D9 93 89 (000.000014) can0 RX - - 109 [8] 40 87 BF 5C 88 D6 80 9F (000.000091) can0 RX - - 109 [4] 00 5C AB 7E (000.054988) can0 RX - - 10B [8] 0E 19 …

This is a result of the CANBUS monitoring tool from the klipper CANBUS troubleshooting page. Like I said, it’s a packet capture of the CAN network traffic. Kinda like PCAP for LAN. Beyond my knowledge to interpret, but per their troubleshooting guide, the tool is available.

[image] Bacheshatonee: I am using the M8P as the CAN adapter and do not have a separate CAN board. I believe you are mistaken. Your configuration shows the only “route” to the MCU is via can. I do see a passing mention of Using SPI to CAN in the CB2 documentation. That leads to instructions…

I tried running “./scripts/parsecandump.py mycanlog 108 ./out/klipper.dict” but I get a bunch of errors that I didn’t think appropriate to put here until someone needed it. @cardoc It was installed using the USB to CANBUS Bridge mode. I can link to the youtube I used for the install if needed, It…

@cardoc With this hardware setup the resistor is on the “end” device on the CAN network. If there are no additional MCU’s other than the M8P no resistor is needed. I assume there is something in the software/drivers that allow that to work. Here is the link to the setup I used. The only mod I ma…

I’m really not conversant with CANopen. I am however very familiar with J1939 (SAE Spec) as I worked in the global tech call center for Freightliner. Modern trucks (real trucks not a Ridgeline or F150) have 20 to 50 CAN nodes on the main chassis bus. In that “universe” 90% of the communication issu…

This error occurred with single ESB42 with the resistor pins bridged on the end of a straight cable containing 2 twisted pairs of wire. One 18ga the other 14ga. The 14ga are 24v and ground. The 18ga are Tx/Rx. The shielding is grounded at the M8P side only. When I use more than 1 ESB42 the same…

CAN network failures - M8P CB2 EBB42

General Discussion

Bacheshatonee August 3, 2025, 7:03pm 3

/here it is zipped.

klippy(8).zip (3.2 MB)

Klipper Log Visualizer

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CAN network failures - M8P CB2 EBB42

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