Printhead randomly stops on corners

General Discussion
1

Basic Information:

Printer Model:
MCU / Printerboard: spider 2.3
Host / SBC Rock Pi 4b
klippy.log (1.6 MB)

klippy.log

Describe your issue:

After two years of using the printer, I started experiencing an issue with the printhead periodically stopping, but only at the corners. Slicing is done in Orca Slicer. I’ve tried other versions (2.3.2.2.2.1) and Prusa Slicer, but the problem persists. It appears on geometric primitives, as seen in the Pressure Advance test.

I reinstalled the system (Armbian 11), set up Klipper again, and updated the MCU. RAM and eMMC memory tests pass normally. The SBC temperature is 40–45°C. The host is connected to the MCU via a USB cable, which I also checked and replaced. the bed mesh in the printing area has deviations of no more than .1 mm and without anomalies.

Am I missing something?

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photo_2025-04-09_19-32-20
photo_2025-04-09_19-32-20960×1280 171 KB

2

Hello @Kolpa !

You set Pressure advance in the [extruder] section (line 16 & 17):

[extruder]
step_pin = PD5
dir_pin = !PD6
enable_pin = !PD4
microsteps = 64
rotation_distance = 5.6
nozzle_diameter = 0.400
filament_diameter = 1.750
heater_pin = PB15
sensor_type = PT1000
sensor_pin = PC0
min_temp = 0
max_temp = 350
max_extrude_cross_section = 100
max_extrude_only_distance = 1000
pressure_advance = 0.036
pressure_advance_smooth_time = 0.030
min_extrude_temp = 100
control = pid
pid_kp = 17.328
pid_ki = 1.179
pid_kd = 63.680

Have you also set it in the slicer?

grafik
grafik828×657 59.6 KB

3

Hello @EddyMI3d ! Thanks for the reply. PA is disabled in the slicer, using control from Klipper

4

vase mode on this video