Filament not being extruded mid-print

General Discussion
1

Basic Information:

Printer Model: Prusa i3MK3S+
MCU / Printerboard: Einsy
Host / SBC: RPi 5

Describe your issue:

It has happened many times today that in the middle of the print jobs, filament was not being extruded. For the last few prints, it printed one or a few layers and then no filament was extruded. What is the cause? I unloaded the filament and loaded again. Same problem. Tried different filament. Same problem.

Not sure if related but in the past, this seemed to happen more likely when I left the filament loaded in the printer unused for a few hours before printing again. Why doing so increased the chance of no filament being extruded mid-print?

2

Sorry I forgot to mention that I am using E3D Revo 6 High Flow Nozzle 0.4 with high flow heatercore.

One strange thing that I noticed the past few days is that sometimes as the tip of the filament entered the extruder, it got automatically is guided in. However, sometimes I have to manually push it by, say about 5cm, before it was guided to extrusion. What is wrong?

3

Please attach the klippy.log you have been asked for to your next post.

4

no_extrusion_klippy.log (2.2 MB)

Did a hardware maintenance but the problem remains. Hope it is a software issue.

5

Have you tried with a higher motor current?

BTW: How did you estimate that huge amount of driver parameters? Do you know what they do?

Another notice: What do you use the diag1_pin for in the extruder?

#diag1_pin:
#   The micro-controller pin attached to one of the DIAG lines of the
#   TMC2130 chip. Only a single diag pin should be specified. The pin
#   is "active low" and is thus normally prefaced with "^!". Setting
#   this creates a "tmc2130_stepper_x:virtual_endstop" virtual pin
#   which may be used as the stepper's endstop_pin. Doing this enables
#   "sensorless homing". (Be sure to also set driver_SGT to an
#   appropriate sensitivity value.) The default is to not enable
#   sensorless homing.
6

Hello, I have not tried with a higher motor current.

I did not estimate any driver parameters and I did not assign diag1_pin myself. Everything was set up automatically during installation of Klipper via the following method:

GitHub - dz0ny/klipper-prusa-mk3s: Structured Klipper config for Prusa MK3s 3D printer

7

When you got trouble with that specific stuff, you may ask the author.

8

He does not provide support. Tried in the past already.

9

Great! Throwing some stuff into the world and then not want to be responsible for it. :face_vomiting:

I suggest to go a different way to adapt the MK3S to Klipper.

10

:thinking: I never had issues with that config. You could probably take the TMC2130 parameters from the below official config and put them in your current config.

11

Thanks. So I just put it in ~/printer_data/config?

Currently, the “einsy-rambo.cfg” file is located at ~/printer_data/config/klipper-prusa-mk3s/mk3/einsy-rambo.cfg Will it be automatically removed or I have to delete it.

12

You could do that, but I would just remove the TMC sections from your existing config and copy and paste the TMC sections from the linked config into your config.

13

I don’t see any TMC sections in ~/printer_data/config/klipper-prusa-mk3s/mk3/einsy-rambo.cfg but there are a few in :~/printer_data/config/klipper-prusa-mk3s/mk3s/tmc2130.cfg. So I just replace the original ones by the ones listed in config/generic-einsy-rambo.cfg

14

Just remove the line in your printer.cfg that includes it and then paste in the TMC2130 sections from the config I linked previously.

15

I see that in printer.cfg, it includes a tmc file from that github site I mentioned. I pasted value from the config linked but it became worse. Now it failed to extrude in the middle of the first layer.