Can somebpdy help me as I’m struggling with an issue with my Ender 3 V2 extruder. The extruder is clicking after laying down the 1st layer. The machine had been running with no issues for over 4 months now, I have made various upgrades including BLTouch, tried different hot ends, etc.
I'm mainly printing TPU and have printed it with no issues using a stock Ender 3 V2. However, last week I was changing the hotend back to stock and accidentally snapped the thermistor wiring. I ordered some replacements as below and replaced the thermistor and hot end back to stock.
- Comgrow Creality 3D Printer NTC Thermistor Temp Sensor 100K for Ender 3 / Ender 3 Pro/Ender 5 / CR-10 / CR-10S
At the same time, I removed the BLTouch, and to be honest, I was finding I was getting just as good prints without it on both a 2nd and 3rd printer I have (both Ender 3 V2’s). This meant re-flashing the firmware back to stock. So effectively, I now have a stock Ender 3, but it has developed this clicking noise from the extruder after the first layer is laid (1st layer is perfect).
I can see the TPU material getting snagged in the extruder when the clicking is occurring, so its clearly not making its way through the hotend and blocking up. Can somebody give any advice as to why though? Everything is fine for the 1st layer but then the problem starts halfway through the 2nd or 3rd layer? I have calibrated my extruder steps (after re-flashing) and they changed from 93 to 114 (which seemed a big change). I'm printing the TPU at 205 °C, and even taking the same file to my other 2 printers has no issue, so I’m not sure what has changed?
If somebody can give any advice, it would be most welcome!