If the Alta print head nozzle is moving but no filament is coming out, there are a few possible reasons.
If the filament gets stuck near the top of the print hose, the gear that moves the filament in and out of the extruder may have worn down part of the filament and caused it to stay in place rather than feed through the machine properly.
To fix this, simply pull out the filament, find the section of filament that is worn down (it won’t be as smooth or as thick as the rest of the filament), and cut off that part. You can then reload the filament into the machine and attempt a print.
The filament on the spool is may be tangled. Filament can become tangled easily if not properly wound up, and may snag in such cases and not come off the reel.
- Remove the filament from the machine
- Unravel the filament from the reel until any tangles are removed
- Carefully place the filament back on the reel taking care not to let it tangle again during loading
- Reload the filament into your Alta printer
The nozzle head may be clogged. To check this, you can use the nozzle cleaner tool (the small tool with the thin metal piece and the plastic handle):
To unclog the nozzle:
- Poke the nozzle cleaner inside and up through the nozzle head a few times to try and move any plastic that may have solidified
- Check outside and around the nozzle head. In some cases, the melted filament may have coated some or all of the shell on the metal extruder portion of the print head nozzle.
- If checking these points does not resolve the issue, remove the hose attachment from the extruder head. You can do this by pressing down on the gray ring as you pull up on the tube and use the rod that came with your machine to push the filament out. If nothing comes out and you are still experiencing issues, you can attempt to manually heat up the print head and perform the action with the nozzle cleaner again.