G28 Timer too close

[Maerians]

Hey guys, can anyone help me figure out how to fix this problem, G28/G28 X/G28 Y/G28 Z MCU shows timer too close error no matter what, how to solve this problem?

klippy.log (1.2 MB)

[Sineos]

See Timer too close

[nefelim4ag]

Mmmm,
The only suspicious thing that I was able to find:

[mcu]
serial = /dev/serial/by-id/usb-1a86_USB_Serial-if00-port0
...
MCU 'mcu' config: ADC_MAX=4095 BUS_PINS_i2c1=PB6,PB7 BUS_PINS_i2c1a=PB8,PB9 BUS_PINS_i2c2=PB10,PB11 BUS_PINS_spi1=PA6,PA7,PA5 BUS_PINS_spi1a=PB4,PB5,PB3 BUS_PINS_spi2=PB14,PB15,PB13 BUS_PINS_spi3=PB4,PB5,PB3 CLOCK_FREQ=72000000 MCU=stm32f103xe PWM_MAX=255 RECEIVE_WINDOW=192 RESERVE_PINS_serial=PA10,PA9 SERIAL_BAUD=250000 STATS_SUMSQ_BASE=256 STEPPER_BOTH_EDGE=1
...
Stats 3045.3: gcodein=0  mcu: mcu_awake=0.002 mcu_task_avg=0.000016 mcu_task_stddev=0.000010 bytes_write=17355 bytes_read=398592 bytes_retransmit=18 bytes_invalid=7 send_seq=2607 receive_seq=2607 retransmit_seq=2 srtt=0.003 rttvar=0.000 rto=0.025 ready_bytes=0 upcoming_bytes=0 freq=72004963  heater_bed: target=0 temp=28.0 pwm=0.000 MCU: temp=37.7 Host: temp=25.0 sysload=0.50 cputime=45.434 memavail=2422140 print_time=2331.726 buffer_time=0.000 print_stall=0 extruder: target=0 temp=28.3 pwm=0.000
...
clocksync state: mcu_freq=72000000 last_clock=167871494748 clock_est=(3016.181 165812614913 72004963.232) min_half_rtt=0.001219 min_rtt_time=3020.125 time_avg=3016.180(845.629) clock_avg=165812614913.830(60889468461.576) pred_variance=744583.872
Dumping serial stats: bytes_write=17499 bytes_read=398624 bytes_retransmit=123 bytes_invalid=7 send_seq=2618 receive_seq=2608 retransmit_seq=2616 srtt=0.003 rttvar=0.000 rto=0.025 ready_bytes=0 upcoming_bytes=0

It looks like there is an issue with data transmission during homing (bytes_retransmit).

Anyway, it is expected that you fill out the template before creating an issue.

### Basic Information:
[x] Printer Model: 
[x] MCU / Printerboard:
[x] Host / SBC
[x] klippy.log

Because that can lead to some additional information, guesses.

[Maerians]

Basic Information:

Printer Model: MKS Robin E3D V1.1
MCU / Printerboard:Ender3 v2 (The mainboard has been replaced“MKS Robin E3D V1.1”)
Host / SBC:Redmi Note 4X（This is the Redmi Note 4X flashed with Ubuntu,The current version of the operating system is: Ubuntu 24.04.2 LTS）

klippy.log
klippy (1).log (19.3 KB)

[Maerians]

Hey, buddy, help me check this out

[Sineos]

@Maerians

SBC:Redmi Note 4X

• TTC is mainly a host error
• You are using a non-standard host with a non-standard OS

While I’m not saying that this combination is at fault or cannot work, it would still be my first suspect.