Klipper crashing mid print

General Discussion
1

Basic Information:

Printer Model: Voron Trident corexy
MCU / Printerboard: BTT Octopus pro v1.1 h723
Host / SBC RPi 3B+
klippy.log

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klippy.zip (1.4 MB)

cases attach your klippy.log file (use zip to compress it, if too big). Pasting your printer.cfg is not needed
Be sure to check our “Knowledge Base” Category first. Most relevant items, e.g. error messages, are covered there

Describe your issue:

…printer stops in middle of the prints. showing mcu ebbcan shutdown: scheduled digital out event will exceed max duration. display is also going blank. only the fans are running. unable to find the issue

2

Please check if the error reproduces without the LED effects modification.

3

i have removed all led effects and started the print but same problem happened. klipper shutdown.

next time i also added dtoverlay=dwc2 in config.txt and restarted the print but even this coudnt resolve the issue.

attaching the recent log again.

klippy (1).zip (1.2 MB)

4

The step then locks up like this, so if that’s the case, check the speeds and accelerations in the slicer and settings,

increase x and y → run_current = 0.85
decrease →

max_velocity = 500
max_accel = 8000
max_z_velocity = 35
max_z_accel = 180

try lower speed printer

5

Hmmm, I think there are different issues.
Missed scheduling of next digital out event - please update: heaters: Set next_pwm_time to 0.66 * MAX_HEAT_TIME by KevinOConnor · Pull Request #7008 · Klipper3d/klipper · GitHub

But the real reason is probably just a CAN communication issue:

Dumping serial stats: bytes_write=7324129 bytes_read=1338897 bytes_retransmit=2231 bytes_invalid=1226 send_seq=137888 receive_seq=137884 retransmit_seq=137888 srtt=0.026 rttvar=0.009 rto=0.989 ready_bytes=1147 upcoming_bytes=2725

And this one is probably a power or RPI reset for some reason.

Stats 6100.4: gcodein=0 mcu: mcu_awake=0.000 mcu_task_avg=0.000001 mcu_task_stddev=0.000001 bytes_write=255Starting Klippy...
Args: ['/home/pi/klipper/klippy/klippy.py', '/home/pi/printer_data/config/printer.cfg', '-l', '/home/pi/printer_data/logs/klippy.log', '-I', '/home/pi/printer_data/comms/klippy.serial', '-a', '/home/pi/printer_data/comms/klippy.sock']
Git version: 'v0.13.0-211-gedbfc6f85-dirty'

JFYI, generally if someone asks you to run without a “thing” that mean at least commenting it out in the config, or better remove it completely from the installation.

6

thankyou for ur precious assistance…..i’ll look into it and update asap.

7

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