- It is definitely time-based, not Z-height. If I print something tall and thin or short and broad, it still fails at the same time, but vastly different heights
- Leveled the bed.
- Cura slicer - I've tried newly sliced files and old ones that have previously printed successfully.
- I've replaced the nozzle at least three times during my troubleshooting, because they're cheap and why not?
- Have also replaced: Bowden tube, Bowden tube coupler at the top of the heat sink, the throat, the block, the heat element and the thermoresistor
- Fans still working.
- Extruder is the upgraded all metal one, so it's not the classic broken plastic arm
- Have disassembled and cleaned the extruder
- Leveled the bed.
- Have verified the gear and wheel are lined up
- Have both loosened and tightened the tension arm.
- Recalibrated the e-steps (twice now, just to be sure)
- Printed faster and slower
- Printed hotter and cooler
- Fed the reel both clockwise and counterclockwise
- Checked the spinal arm for worn-in grooves
- Made sure the nozzle was tightened after fully heated.
- Likewise seated the (freshly clean-cut) tube while hot (and while cold, for the heck of it.) Tube is Capricorn.
- Leveled the bed.
- Tried open filament, filament stored in a Ziploc with dry pack and a brand new spool. Different brands for each.
- Nozzle is still hot after the failure. I don't have an infrared thermometer to verify the temp, but if I pull the filament, clip the end and feed it back in, it will feed again.
- Leveled the bed.
Can anyone help? I'd really appreciate it.