Printer Model: Ender3
Attachement List:crowsnest.log (2.4 MB)klippy (1).log (4.2 MB)moonraker.log (6.8 KB)printer.cfg (5.0 KB)
I have Ender3 with AVR Atmega 1284P since almost 1+ years. i have updated klipper on 20th April 2025. after that update faced problem of klipper stopped with error "Klipper Internal error on command:“G1” for almost 4 times. i have restart Raspberry pi and printer MCU but still print stopped with same fault. i have attached log files and printer config file for reference.
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The real error is:
b'stepcompress o=3 i=0 c=89 a=0: Invalid sequence'
The right question is “Why?” =\
Loaded MCU 'mcu' 121 commands (v0.13.0-50-gf2b27d17b / gcc: (GCC) 5.4.0 binutils: (GNU Binutils) 2.26.20160125)
MCU 'mcu' config: ADC_MAX=1023 BUS_PINS_spi=PB6,PB5,PB7 BUS_PINS_twi=PC0,PC1 CLOCK_FREQ=16000000 MCU=atmega1284p PWM_MAX=255 RECEIVE_WINDOW=192 RESERVE_PINS_serial=PD0,PD1 SERIAL_BAUD=250000 STATS_SUMSQ_BASE=256 STEPPER_OPTIMIZED_UNSTEP=40 STEPPER_STEP_BOTH_EDGE=1
Configured MCU 'mcu' (1024 moves)
Loaded MCU 'rpi' 124 commands (v0.12.0-432-gfec3e685c / gcc: (Debian 10.2.1-6) 10.2.1 20210110 binutils: (GNU Binutils for Debian) 2.35.2)
MCU 'rpi' config: ADC_MAX=4095 CLOCK_FREQ=50000000 MCU=linux PCA9685_MAX=4096 PWM_MAX=32768 STATS_SUMSQ_BASE=256
Configured MCU 'rpi' (1024 moves)
Args: ['/home/TechnoKlipper/klipper/klippy/klippy.py', '/home/TechnoKlipper/printer_data/config/printer.cfg', '-l', '/home/TechnoKlipper/printer_data/logs/klippy.log', '-I', '/home/TechnoKlipper/printer_data/comms/klippy.serial', '-a', '/home/TechnoKlipper/printer_data/comms/klippy.sock']
Git version: 'v0.13.0-50-gf2b27d17b'
Branch: master
Remote: origin
Tracked URL: https://github.com/Klipper3d/klipper.git
This is not a TMC driver, so there is mostly no new or adjusted code.
On a second glance:
receive_seq=4618 retransmit_seq=0 srtt=0.000 rttvar=0.000 rto=0.025 ready_bytes=0 upcoming_bytes=0 freq=50000178 adj=49999383 sd_pos=142142 heater_bed: target=60 temp=59.9 pwm=0.177 sysload=0.13 cputime=144.898 memavail=3474012 print_time=4433.763 buffer_time=2.210 print_stall=0 extruder: target=220 temp=220.1 pwm=0.417
b'Got EOF when reading from device'
Stats 4456.9: gcodein=0 mcu: mcu_awake=0.056 mcu_task_avg=0.000265 mcu_task_stddev=0.000260 bytes_write=1227708 bytes_read=733210 bytes_retransmit=27 bytes_invalid=0 send_seq=45569 receive_seq=45569 retransmit_seq=2 srtt=0.003 rttvar=0.000 rto=0.025 ready_bytes=56 upcoming_bytes=0 freq=16000266 rpi: mcu_awake=0.001 mcu_task_avg=0.000012 mcu_task_stddev=0.000023 bytes_write=27902 bytes_read=87977 bytes_retransmit=0 bytes_invalid=0 send_seq=4619 receive_seq=4619 retransmit_seq=0 srtt=0.000 rttvar=0.000 rto=0.025 ready_bytes=0 upcoming_bytes=0 freq=50000182 adj=49999391 sd_pos=142258 heater_bed: target=60 temp=59.9 pwm=0.182 sysload=0.13 cputime=144.937 memavail=3474028 print_time=4434.718 buffer_time=2.163 print_stall=0 extruder: target=220 temp=220.0 pwm=0.464
Stats 4457.9: gcodein=0 mcu: mcu_awake=0.056 mcu_task_avg=0.000265 mcu_task_stddev=0.000260 bytes_write=1227708 bytes_read=733210 bytes_retransmit=27 bytes_invalid=0 send_seq=45569 receive_seq=45569 retransmit_seq=2 srtt=0.003 rttvar=0.000 rto=0.025 ready_bytes=56 upcoming_bytes=792 freq=16000266 rpi: mcu_awake=0.001 mcu_task_avg=0.000012 mcu_task_stddev=0.000023 bytes_write=27908 bytes_read=87993 bytes_retransmit=0 bytes_invalid=0 send_seq=4620 receive_seq=4620 retransmit_seq=0 srtt=0.000 rttvar=0.000 rto=0.025 ready_bytes=0 upcoming_bytes=0 freq=50000179 adj=49999429 sd_pos=142258 heater_bed: target=60 temp=59.9 pwm=0.182 sysload=0.13 cputime=144.958 memavail=3474040 print_time=4435.632 buffer_time=2.076 print_stall=0 extruder: target=220 temp=220.0 pwm=0.464
Stats 4458.9: gcodein=0 mcu: mcu_awake=0.056 mcu_task_avg=0.000265 mcu_task_stddev=0.000260 bytes_write=1227708 bytes_read=733210 bytes_retransmit=27 bytes_invalid=0 send_seq=45569 receive_seq=45569 retransmit_seq=2 srtt=0.003 rttvar=0.000 rto=0.025 ready_bytes=56 upcoming_bytes=1572 freq=16000266 rpi: mcu_awake=0.001 mcu_task_avg=0.000012 mcu_task_stddev=0.000023 bytes_write=27914 bytes_read=88009 bytes_retransmit=0 bytes_invalid=0 send_seq=4621 receive_seq=4621 retransmit_seq=0 srtt=0.000 rttvar=0.000 rto=0.025 ready_bytes=0 upcoming_bytes=0 freq=50000175 adj=49999383 sd_pos=142346 heater_bed: target=60 temp=59.9 pwm=0.182 sysload=0.12 cputime=144.972 memavail=3474040 print_time=4436.636 buffer_time=2.080 print_stall=0 extruder: target=220 temp=220.0 pwm=0.464
Stats 4459.9: gcodein=0 mcu: mcu_awake=0.056 mcu_task_avg=0.000265 mcu_task_stddev=0.000260 bytes_write=1227708 bytes_read=733210 bytes_retransmit=27 bytes_invalid=0 send_seq=45569 receive_seq=45569 retransmit_seq=2 srtt=0.003 rttvar=0.000 rto=0.025 ready_bytes=56 upcoming_bytes=1963 freq=16000266 rpi: mcu_awake=0.001 mcu_task_avg=0.000012 mcu_task_stddev=0.000023 bytes_write=27920 bytes_read=88025 bytes_retransmit=0 bytes_invalid=0 send_seq=4622 receive_seq=4622 retransmit_seq=0 srtt=0.000 rttvar=0.000 rto=0.025 ready_bytes=0 upcoming_bytes=0 freq=50000174 adj=49999335 sd_pos=142428 heater_bed: target=60 temp=59.9 pwm=0.182 sysload=0.12 cputime=144.987 memavail=3474040 print_time=4437.985 buffer_time=2.428 print_stall=0 extruder: target=220 temp=220.0 pwm=0.464
Stats 4460.9: gcodein=0 mcu: mcu_awake=0.056 mcu_task_avg=0.000265 mcu_task_stddev=0.000260 bytes_write=1227708 bytes_read=733210 bytes_retransmit=27 bytes_invalid=0 send_seq=45569 receive_seq=45569 retransmit_seq=2 srtt=0.003 rttvar=0.000 rto=0.025 ready_bytes=56 upcoming_bytes=2705 freq=16000266 rpi: mcu_awake=0.000 mcu_task_avg=0.000007 mcu_task_stddev=0.000012 bytes_write=27926 bytes_read=88054 bytes_retransmit=0 bytes_invalid=0 send_seq=4623 receive_seq=4623 retransmit_seq=0 srtt=0.000 rttvar=0.000 rto=0.025 ready_bytes=0 upcoming_bytes=0 freq=50000171 adj=49999318 sd_pos=142428 heater_bed: target=60 temp=59.9 pwm=0.182 sysload=0.12 cputime=145.000 memavail=3474044 print_time=4438.776 buffer_time=2.218 print_stall=0 extruder: target=220 temp=220.0 pwm=0.464
Timeout with MCU 'mcu' (eventtime=4461.903617)
Transition to shutdown state: Lost communication with MCU 'mcu'
Dumping gcode input 0 blocks
This is strange. Because there is a communication error, and only then a G1.
Sineos
April 21, 2025, 6:47pm
4
It looks like the initial error is
Timeout with MCU 'mcu' (eventtime=4461.903617)
Transition to shutdown state: Lost communication with MCU 'mcu'
and the other errors are just consequences. See Timeout with MCU / Lost communication with MCU . As a first attempt, I would try disconnecting the webcam.
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Okay. Will remove webcam and try to print “with no filament” as already wasted plenty due to almost 4 failed print.