Hello everyone, I'm new to the forum.
Yesterday we finished building our Ultimaker and we did some test printing.
Unfortunately after a couple of prints the pal plastic has become brown and stopped going out, while the extruder was smoking.
I go for points to make it easier to understand what happened:
-During the installation we had to cut a little the tube because the reoìcomended 8mm were too many and was impossible to have a contact between the metal connector and the wood.
Once shortened to 1 mm is left a small gap between the metal and wood, but there was also in the picture of the guide and confirmed that the the tube was in pressure against the peek.
-However, we applied the Teflon tape from between the extruder and the peek as recommended.
-During setting of the axes from the replicator g control panel, on all axes the machine answered correctly except for the extrusion mechanism, which carried out the orders just some times and with a big delay.
-During the prints, instead, of extrusion spinning properly.
- Before the last print, the extrusion head remained in contact with the Z plan and kept out of plastic, which may have formed a cap.
-Extruder smoked from the hole, and we seen that the temperature had reached 290 °C, while we had set 250.
-Before the last print, came out a bit 'of plastic from the extruder top, but in small quantities.
We would like to know whether it is a widespread problem, if there is a way to cleanthe extruder, or whether it is possible to order another one.