Basic Information:
Printer Model: SecKit Tank CoreXY on Fluidd
MCU / Printerboard: BTT Manta M8P V2.0, BTT EBB36 v1.2
Host / SBC: BTT CB2 with v1.0.5 BTT’s Debian 11 image here
klippy.log A: With MCU: EBBcan error
klippy(1).log (428.9 KB)
klippy.log B: With MCU: MCU error
klippy.log (4.8 MB)
Hello,
Been working on getting a SecKit Tank going with CANBus on the above boards, but keep getting randomly-timed shutdowns with the error “Missed scheduling of next timed event”. It alternates between the error on the EBB36 (EBBcan) and the MCU (Manta M8P) and will fail in anywhere from a few minutes to a couple hours, though sometimes it will complete prints without errors (Was able to run a few calibration cubes and smaller parts).
*Another user with the error here
Error in klippy.log:
- CANBus wires to the EBB36 are 18g power directly off the 24v PSU and a twisted pair of 20g for data to the CANBus port on the Manta M8P
- Stepper-motor wires are all shielded and grounded to the printer frame
- Both ends of the cable have the jumpers installed for the 120ohm terminations and probing both sides will show 60ohms (parallel 120ohm) and 120ohms if removed.
Printer has a heated enclosure, heatsinks on important chips (Temps below)
I can see that bytes_invalid doesn’t ever increase, but bytes_retransmit will jump just before the shutdowns.
Within SSH on the CB2 I’ve tried:
- Reflashing BTT’s OS image a couple times as well as firmware for the MCU and EBB36
- Different CANBus speeds from 250k to 1M (flashed across all three boards and updated in the interfaces config)
- txqueuelen’s of 128 and 1024
Interfaces config settings:
I also ran the two klippy.logs through the Advanced Trouble-Shooting graph tool:
EBBCan Error:
MCU Error:
I’ve read through I don’t know how many forum posts about CANBus and at this point I’m stuck and not sure what to check/try next?