Problems after switching from Prusa PLA -> Prusa PETG -> Hatchbox PLA
I purchased my Prusa fully assembled and it's been printing successfully for probably 100 hours with Prusa filament. I switched to some brand new Hatchbox filament (vacuum-sealed so moisture shouldn't be an issue?) and printed a small, 3h print, and it seemed fine. After trying to print the other side, which is a mirror image, is when the problems started. First, no filament was coming out. I unloaded and reloaded, and then it started to extract and tried again.
After a bit into the print, I found the print detached and a huge glob of PLA on the tip. I remove the glob, tried to unload/load, and then it started to click. I've tried to unload, reload etc, as my gut says the change from PETG to PLA cause some kind of flow issue.
I got it to click a whole bunch less after these steps, but as you can see in the video below it's still having an issue. Any ideas?
RE: Problems after switching from Prusa PLA -> Prusa PETG -> Hatchbox PLA
One observation from your video, the heatbed temperature is 14° over temp. This will prevent PLA from properly sticking to the print plate cuz it's too hot. Need to resolve the temp issue with your heatbed. I'd search the forum for similar issues as I don't have any experience in resolving this issue. Not knowing anything about it, I'd reset the printer and do a firmware update if needed, unplug/plug bed temp connector from the mainboard, look at the temp sensor wires for any issues...
RE: Problems after switching from Prusa PLA -> Prusa PETG -> Hatchbox PLA
I think you've got 2 issues going on:
- Your 1st layer is not adhering. This is typically due to one or a combination of cleaning the bed and Live-Z adjustment. There are a lot of threads on these topics here on the forums.
- If you switched from a high-temp filament (PETG) to a lowe-temp filament (PLA), it's possible some higher-temp PETG was left behind in the nozzle or hotend. This will not melt out when printing at lower PLA temperatures and is a common cause of partial clogs which are a common cause of extruder clicking. I can see the filament twitching with the clicks. If you mount an extruder visualizer, you'll probably see the extruder physically kicking back as it can't overcome the partial clog and loses grip on the filament. If you raise Z, heat up the nozzle, and extrude some filament into free air, you'll see it pulling to one side or coming out unevenly if you have a partial clog. When the nozzle is clear, it should come out evenly and coil neatly under the nozzle. Investigate doing some cold pulls to clear the hotend and nozzle when swapping from high to low temp filament.
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