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Hi molmsted98. Thanks for your feedback about my extruder design. If your filament gets stuck, even if you're pushing by hand, something else might be an issue.
Is this the first extruder in this setup. If not, did you experience any problems with other extruders? Which material and hotend do you have? Sometimes PLA gets stuck if the hotend is not cooled properly. Did you check the hotend temperature? Maybe it's too low due to a misconfigured firmware or faulty thermistor. Or maybe your hotend nozzle is clogged. Did any material exit the nozzle? If not, maybe your hotend is not assembled properly and the filament path is blocked by a misalignment.
Please feel free to get back to me for further consultation. Hopefully the problem can be solved.