<p>I’ve a Flashforge Adventurer 3 which I’ve found to be a fantastic out of the box ready to go printer. I’ve clocked up 500 hours on it.</p>
<p>I’ve had issues where the nozzle was too close to the print bed, making it impossible for the extruder wheel to force filament down the bowden tube. With harder filaments that results in clicking as it’s cog is skipping. With softer, usually matte PLA it’s just wearing a groove and no longer pushing. I have to take the then baked filament and manually push it out of the nozzle, then bed recalibration.</p>
<p>I have a filament dryer, and use it every time I’m printing as it’s a perfect dispenser with it’s roller bearings.</p>
<p>I recently keep getting prints where they start out perfect, but then after about layer 10, the extrusion simply stops. The printer obviously carries on like all is ok, but there’s not even spaghetti.</p>
<p>What could this be? Do I just need a new nozzle? I don’t understand how a metal nozzle printing plastic can deteriorate it. It’s not the same as pitting you get in a soldering iron tip surely…</p>
<p><a href="https://i.stack.imgur.com/IdDcQ.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/IdDcQ.jpg" alt="Edited with photo of hobbed gear as @fred_dot_u suggested" /></a></p>
<p><a href="https://i.stack.imgur.com/EFz2Q.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/EFz2Q.jpg" alt="Failed print. I’ve had several fail the same way. It’ll start out ok then the extrusion seems to fizzle out" /></a></p>

[{'answer_id': 19682, 'author': 'Kilisi', 'author_id': 31811, 'author_profile': 'https://3dprinting.stackexchange.com/users/31811', 'pm_score': 1, 'selected': False, 'text': "<p>Nozzles do degrade with use. That is why they're made to be easily replaceable.</p>\n<p>Your problem may be a worn nozzle or incomplete cleaning or something with the bowden tube etc,. but an easy troubleshooting step is just to replace the nozzle.</p>\n"}, {'answer_id': 19700, 'author': 'RDragonrydr', 'author_id': 14313, 'author_profile': 'https://3dprinting.stackexchange.com/users/14313', 'pm_score': 0, 'selected': False, 'text': "<p>I have had this happen at times. I finally got it to go away once I fixed my bed adhesion.</p>\n<p>By chance is your print curling up near the edges? If it's popping up and exerting backpressure on the extruder, that can be enough to cause an internal jam and the extruder &quot;clicking&quot; (which is itself just a sign that the plastic isn't feeding).</p>\n<p>There might be additional problems or other causes, but this was what fixed my issue.</p>\n"}]
['https://3dprinting.stackexchange.com/questions/19680', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/32882/']