I have this weird, annoying problem with my 2.5s printer, it does not hinder me from printing, but I would still like to resolve it and came here for your help, if you are willing.

I went though a turbulent phase in my life and my printer ended up stored and unused for years, so a couple of days ago, I took it out of the moth balls and started printing again. I dusted the printer, lubricated the rods, a firmware update/calibration and here comes the gcode!

My first print failed and it turned out that the gear that fastens on the extruder motor was loose, so I tighten it and problem solved, ah the dopamine from solving the first printing problem after years was sweet. The printer finished its first print after its long rest in limbo!

Now to the issue at hand, since then, each time I print or try to load/unload filament, I get the mintemp bed error (around 30-31C), but if I power cycle/restart the printer and try again (while the bed is still warm from the first try) it does successfully finish the print. If I let the bed cool down  (around 18-20C bed temp) and retry I get the mintemp error again. Attached are images before (idle printer) and after (the moment the mintemp error appeared).

Thank you for your time, Christopher.

Some facts:

The printer was unused for years

The room temp is 17-18C

One of my prints recently failed when it ran out of filament but the printer did not stop to give me the opportunity to reload.

It’s the first time I tried this feauture since, never verified its function before/not sure I’m using this feature correctly, would you be so kind as to help me out?

Thank you for your time, Christopher.

Some facts:

It’s the first time I tried this feauture since I owned this printer, never verified its function before.

The filament got stuck right after the extrurer motor gear, the printer was still trying to print.

In the support menu it appears that the sensor successfully detected the filament presence/absense. (I tried with the same filament material White PLA)

In the settings/filament sensor the action was turned to continue, all other options where ON.

I updated my MK2.5S (MK52 bed) to firmware 3.14.1-8237

Printer homes but XYZ calibration fails with: “Calibration failed. Check axes and run again.” When I manually line up the PINDA so it is over the hashed circles it is ~15 mm offset in X from the x end stop switch. Y-axis and PINDA height (~1 mm above nozzle) are correct.

Has anyone seen this with the latest firmware?

Should I adjust the X-endstop/extruder mount temporarily, or is there a firmware/EEPROM fix?

thanks

Hi everyone, it's my first time posting here.

I picked up a 2nd hand Prusa i3 Mk2 (I'm told it was upgraded to Mk2.5s) and the heatbed PEI cover is gouged in a few places. The replacement PEI adhesive sheet is pretty expensive directly from Prusa. Are there any other recommendations for alternatives? I've been printing fine so far as long as I avoid the damaged sections. 

Thanks! 

I decided to try get the old Mk 2.5 working with Prusa Connect. I used OctoPrint all the way until I upgraded the Mk 4/s to the Core One. I have generally been happy with Prusa Connect. There are a few things I wish it had, but mostly everything I need is there.

I installed Prusa Link on a Raspberry Pi 3 (b+ I think it is), and it works, however when I try to set up Prusa Link it says it can't obtain the serial number from the printer and wants me to provide it. I have looked through the remnants of all my old upgrades of the printers and was only able to find one serial number and it wasn't remotely in the format it wants (starting with CZX or something like that). So, I contacted support and they gave me some things to try from using Pronterface to using some windows commands and nothing returned a S/N, in any format. My board is a RAMBo1.3a (I think there's an a there). Anyway, its not the older 1.0 version.  They're "working on a solution and will contact me back". It has been a week, and I don't have a high degree of confidence that they'll come up with one.

Has anyone been successful (or even tried) in getting Prusa Link to work with a Mk 2.5 or earlier?  Should I just give up on Prusa Connect and go back to OctoPrint which served me very well for many, many years?  I would like to use the same control software with both printers. I bought one of the stand alone Buddy3D cameras to use with the Mk 2.5 if I can get it working, can I use those with OctoPrint using the RTSP address?  

Should I just give away the old Mk 2.5 to a friend and let it be their headache? hah. 

If anyone has some more troubleshooting steps, maybe even a different firmware, i’ll be happy to do them.

Thanks.

PS: I tested the thermistors resistance and it’s around 100kΩs, which as i’ve researched should be 25°

Unfortunately I cannot pass the calibration so the printer does not let me print, asking to finalize calibration. I' successfully passed all other calibrations, including first layer adjustment, but I cannot pass self test because of the filament sensor. If I disable it, Self Test automatically enable it when started.

Any hint on how to go further?

Thank you.  

Weird?
IMG_5286

Also replaced the PTFE tube and cleaned the "heatsink?" that the nozzle is screwed into.

I did the XYZ calibration, and the height calibration. The calibration print looks nice.

But every time I print something a blob appears after a while. Maybe about 20 min. Roughly 5x5mm and 2 mm high. After this the further printing is scewed, and I have to stop it.

I don't know what to do to fix this. Can someone help?

Attaced a couple of photos