I am using an FT-5. Once I had it set up properly I had beautiful prints that worked well. I have been using it since they came out with the FT-5, but as of this week I started having issues. The pictures below will show you what I am trying to explain. I am using the titan extruder, and have tried various temps. But the last 10 prints I did had what I believe to be underextrusion. I switch to 3 different plastics new out of the box to see if it was my plastic. All 3 did the same thing. I felt the extruder stepper motor and its not any hotter than it usually is. I have watched and checked the gear drive to see if its is slipping but does not appear to be. I have had the gear grind into the filament before, but this doesn't present the same issue. No sound indication that its grinding. I cleaned the tip with a .4 tip cleaner and ran 30 inches of filament thru it at 250 degrees to try to help clean out any partial clog. But none of my attempts have shown me a culprit. Maybe some of you have experienced this before and can point me in the correct direction to cure this issue.Thank you for your time in this matter, if you need more information let me know I can tell you what ever you need.Don
What plastic are you using?
Have you recently printed a temperature calibration tower followed by a speed calibration tower? I do fast prints in vase mode with 2-layer walls. I do a temperature tower for every new spool, and a speed tower after every firmware update or hardware repair/adjustment.
There are a bunch of things that can lead to similar results: It is always best to start from first principles and check what the calibration towers indicate.
Think I figured it out will know for sure tomorrow, Ill post what I found, even though it doesn't make sense.
So I have print for 8 hours straight and have not experienced the same issue again. I removed the thermistor and installed a PT100 I had and now the problem is gone. So I would have to say the thermistor was reading incorrectly. Reading higher than normal so the heating element would cool down enough to not soften the plastic enough causing it to grind instead of extruding.