Hi all,
here's some followup on my inherited old lab printer. The thing has been running more or less continuously for the past years (mostly ABS and PETG) and definitely needed some love (and cleaning)
today I managed to fix the rear fan. The wire was broken on two places. As expected at the the bending point near the extruder before the connector and actually inside the print head after the connector. It was broken inside the protective sleeve that bundles all the wires. Apparently it was repaired before and that soldering point came loose. I re-soldered both and used a small heatshrink tube to protect it. The fan turns on when the extruder is over 40C. Thanks @gr5
I've re-seated all the connectors, some of them were a bit loose, probably because of all the transportation.
My other issue was the heated bed. Sometimes the I got the bed temp sensor ER02. I disassembled the heated bed and it turned out that the connectors for the PT100 were a bit oxidized. I cleaned and re-seated them, slightly bending the clip inwards first. I did not get the error anymore.
Furthermore I found some magnalube for the z-axis, which was dry and dusty, so cleaned that as well. I found some unilube for the x-y axes as well, not in the ultimaker box, but my neighbor had some for his model train sets. (i cleaned them first with a tiny bit of isopropyl alcohol). Maybe the bowden tube needs to be replaced too
The printer came with several spools of PLA, ABS and PETG and something called durabio (logical, given that the printer was used for lab stuff). I managed to rescue some of the PLA at 50C since it has been in a rather humid enviroment for a long time. Didn't try the ABS and other materials yet.
Below is my first print in PLA after all the repairs. It took about an hour.
My only concern now is the feeder. It is the old UM2 version, but apparently the UM2+ version is a lot better. Can I just exchange it? I do get some grinding with one of the PLA spools.