Geeetech

Hello @ll,
I'm new here and hope to find answers. I searched the Forum but did not find a solution… so here is my question / problem…

On Christmas I got an Acrylic Prusa I3 Pro B and had a lot of fun with trying to get some acceptable output... not so easy but I learned a lot the last weeks. The Printer is connected to an octopi (Raspberry Pi 4) with octoprint in Version 1.3.12. I had the feeling that it worked well but now I have a problem with this constellation…

After starting the print everything works well but after an amount of time (not always the same timespan) the print stops abrupt…
I found out that there is a message in the log that says, “cold extrusion prevention” (the current print runs with PLA/195°C). In addition, the octopi loosed/closed the connection to the printer. Looking into the octoprint logfile I found more “cold extrusion prevented” messages there.

Is it possible that I have a problem with the extruder heating or the temperature sensor? I have no Idea now what to do… would be happy to get some ideas / input from you.
Thanks in advance!
Martin

Hi,you can check whether the wiring on your hot end is loose and check the resistance of the thermistor on the hot end.

Hi William,
sorry for the late reply, I had no time to work on this the last days.

I checked the wiring of the HotEnd and it looked good from my side of view.

The faillure appears in a timeframe of 30 - 60 min after start of the print. It doesn't look like a general wiring problem, that should appear earlier - or I'm wrong?

Thanks for supporting me.

BR Martin

Hi,maybe your print file contains a print pause command, you can try re-slicing for printing.

Hi William,
I use the Slic3r version 1.3.1-dev for slicing on my PC (Windows) and than upload the file to the octopi. And I had already the same idea and did a re-sicing 3 times now… If it is a problem with the slicer it must be a general problem with this "Thing" because I printed other, bigger "Things" without a problem...
What I am wondering about is, that the Connection from the printer to the octopi get lost... hmm… as I wrote - no idea

BR
Martin

Hi William,

I have a new Update! I printed the same "Thing" via SD Card Slot - no failure, worked fine.

So I think it could be the octopi or in the communication… to be sure that the USB cable isn't the problem I ordered a new one with a double shield.
I'll test it and post the Outcome here than.

Have a good time,
Martin