Running into a new problem, and am hoping you guys can help.
Previously, when I wanted to change filament, I would heat up the hot end, press down on the extruder lever, and pull out the old filament. Reverse the process to add in the new stuff.
Started having a problem today where I couldn't remove the old filament. It was just stuck in the hot end, even at 230c.
This happened to me earlier in the day, and I thought maybe something had happened in the extruder tube or the nozzle, and since I have spares of both on hand, I rebuilt the hot end with a new tube, and a new nozzle, making sure that the tube was correctly inserted with the indented throat flush with the top of the heatbreak. Reset my ZOffset, and started up a new ABS print. Print came out really good, one of the cleanest ABS prints I've done.
The print finished while I has having dinner, but the printer stayed on, and the hot end fan is wired directly to the power supply, so it kept chugging away until all of the temperatures were back down to room temp, and then kept going because the printer was still on.
Successful ABS print done, I wanted to switch over to PLA to print something I need for work tomorrow. Heated up the hot end, waited until it got to 230c, then tried to pull it out. No luck. I eventually pulled hard enough that the filament broke below the heat break. Now I can't feed new filament in, or get the old stuff out, and I'm worried that rebuilding the hot end again will just leave me in the same place after the first print. I also tried using the extruder motor to pull the filament, but it just grinds away on the filament.
Thanks in advance,