We have an old CR-10 3D-Printer at the school where I work.
I think it is a CR-10. It haven’t been used in maybe 10 years.
It starts but it seems hard to load the filament. I put in the filament and tries to turn the knob but not much seem to happen,
can you send like a picture of the knob and the filament type
It might also be that the filament is to thick for the printer
I have been “babysitting” a CR-10 v3 from a nearby high school - which has involved no small amount of maintenance. It had managed to turn a spaghetti-making task (unattended) into a pretty good challenge: it had stuck itself to the bed with an impressive mass of squooged-out plastic that got up into the head in an impressive fashion! That was pretty impressive, but so was the mess inside the hot-end! It was difficult to get the short PTFE tube OUT in order to clear the passage. I replaced the stock PTFE with Capricorn and the 0.4 nozzle with a 0.6 and cleared ALL of the remaining clogs (including one of the two cooling duct passages for part cooling). I’m about to fine-tune the two Z-axis motors to be in sync and parallel to the frame, then level the bed to the frame, too. Fun and games with Mr. Bill.
So much for the intro; on to your situation? I strongly suspect clogging in your hotend. And there is the possibility that your PTFE tube could have been scorched, although that’s less likely as well as less problematic (other than the toxic fumes that would have resulted). So have you tried several cold pulls to see what comes out? That’s the easier “first stab” that you should have in your “arsenal.” In this case, though, you need to suffer through a more major cleanup just to be certain you aren’t constantly impaired and annoyed. Creality has a video in their CR-10 playlist that demonstrates the routine. If you discover a burnt turd like I did, you’ll be glad you took the time! If not, at least you will be able to check off this one matter!
Given the original date of your posting, I do hope this is already very tiny in your rear view mirror!