Under extrusion then nozzle temp issue

[MrBrush 0]

Hi,

 

Printer: Ultimaker 2+ Extended (I purchased a 2 Extended with an upgrade kit)

Firmware:  vers 2.4x

 

I've had this printer since 2016 and have experienced no issues until recently.

 

I only print branded Ultimaker PLA filament. Slice in Cura and just print on defaults. That has worked for almost 7 years ! But...

 

My prints recently began under extruding. No change in printer location or ambient room temperature. I have:

 

1. Replaced the bowden tube.

2. Replaced the teflon collar.

3. Stripped and cleaned feeder - it was fine as tension was set to light setting anyway.

4. Tried old and brand new filament.

 

Now the nozzle is not hot enough to melt the filament. If I set the nozzle temp to 240 then hold filament against it - nothing. Barely even marks it. Obviously I cannot get filament through the print head. 

 

I'm thinking this is likely a temp sensor issue, but don't want to spend any more money without some degree of certainty.

 

Curious if others have similar experience?

 

Thanks!

 

 

 

[UlrichC-DE 108]

Hello

had similar problems. The extrusion only worked cleanly when printing very slowly or from a nozzle diameter of 0.6.
The print nozzles were constantly (supposedly) clogged. PTFE couplers and Bowden cables did not make it any better. The Ex1 motor driver was still good.

I changed the feeders on my old UM2(+) and UM2+ at some point.
I had updated the feeders from UM2+ to Bondtech.

Since then it has been quiet again. This is just an experience report. Of course, I don't know what's wrong with your printer.

Many greetings