Vertex K8400, nozzle pushed out of isolator guide

Vertex 3D Printer Vertex - Issues while printing
1

Hello, first day as a member here. Nice meeting you all.

I attempted my first print using the Vertex K8400 today. Calibrating and loading filament went just fine, but about halfway through the second layer of the first test print, something catastrophic (?) happened: the nozzle was pushed out of the isolator guide and was dragged along the print surface.

From what I can read in the printing software and on the display, temperature never went above 210°C, but there was still smoke and black plastic.

This is how it ended up:

https://www.dropbox.com/s/rudz00849o9nsmo/DSC_0440.JPG?dl=0

First, is this salvageable; second, if it is, how do I salvage the nozzle and guide; and third, what did I do wrong and should never do again?

2

viewtopic.php?f=62&t=14748

3

Yes.

4

Could you recheck the position of the thermistor?

The beige plastic part is made out of PEEK. PEEK has a much (!) higher melting point than 210 so a way that it could have melted is that the thermistor was either faulty or misplaced (outside of the heating block) and thus measuring a much cooler temperature than there actually was.

5

The temperature of your nozzle went towards 400°C, so you have a problem with the thermistor.

Either

  • It is not inserted properly into the slot on the heater block
  • There is a problem with the cabling

The parts are broken, you can request replacement parts here:
support.velleman.eu/

6

Thanks for the help. It was indeed the thermistor that was misaligned.

I got the parts I needed and have rebuilt the printhead. The printer works like a charm now!