alberto

Before probing my machine i would like to get feedback from support. I am astonished that they still didn't reply

The rods are well olied. Yes I have a tester to measure voltage. the shutdown too is quote consistent

I refer to the main electronic board. Still, i always print via SD card

I tried disconnecting all end stop switches (I disconnect also the home switches after the print starts) After a printing a few layers now the printer controller resets (like turning the power off/on). I checked and cleaned from dust the controller fan but no effect

Yes, done. No effect

What do you mean with stopping /restarting it?

The fact that the issue reproduces consistently make me doubt that the issue is a mechanical one. However i will verify

Hello, after using my printer (Ultimaker Original with Hot end UpgradeV2) for around two years, I am no longer unable to correctly print. In several prints, after printing a few layers correctly, the printer head starts to move erratically outside the correct path ruining every print. The behaviour always seem to occur after a few layers. I attempted to print two newly designed STL with the same results. I updated the slicer software (Cura and Netfabb) and the problem occurs with the Gcode of either application. With the Cura update (14.01) I also updated the printer software (Arduino drivers). With the Cura diagnostic (communication, temperature, endstops) no problem was detected. By checking the printer display messages during a print, I noticed that when the printer starts to behave erratically It gives an endstop hit warning on X or Y. On a particular print, this always seem to happen at the same position after 3/4 layer. Of course, the endstop switches are not actually activated as the print is not placed near the envelope borders. I tried placing the object on two different positions on the print bed and the issue still occurs. I checked the endstop connections to the controller and everything is ok.

I am trying to print a big object: with a base around 200mm x 150mm I sliced it with Netfabb, with a raft (as it's contact surface it's very small) and without support. I am having the following problem: the raft is currectly printed and occupies almost all of one raft dimension, but when the ultimaker start printing the first layer, it prints the objects outside the raft and the printing envelope (it may be a coincidence, but in the secondo run I noticied that it started printing the object exactly in the center of the platform). I verified that the endstops are correctly triggered if the printing head reaches the limit and tried to two different alignments of the object on the platform, but each attempt was a failure. Any hints on the possible cause of this anomaly?

In all my prints sliced with Netfabb I get a spill on the piece at the end of the print. Please see the attachment. This is caused by the nozzle continuing to extrude while is (slowly) retracted on the Z axis. With the prints sliced with Cura I didn't have this kind of issue. Any suggestion on how configurate Netfabb to prevent this?

A picture of the last printed object (80% default speed). Its roundness is still not satsfing me.

After making some prints, I went back to fix the belt tensions as the printer seemed unable to print good-looking round forms. By adding some additional tensioners on the x-axis belt the prints improved, however the X stepper belt seems to have loosened after the assembly. When the stepper changes rotation direction, I can clearly see the belt move a little sideways. Unfortunately I cannot tension it anymore, as the stepper is already at the lowest position allowed by the mounting holes. Before extending these holes, any other point to check or suggestions?

I checked according to your suggestions: a) The filament diameter is between 2.8 and 2.9 mm. b) The small screw holding the heating sensor is firmly in place, it cannot move. I warmed the hotend (which is a V.2) at 180°, opened the material feed and pulled back the filament by hand. At the end of it, i noticed a small burned part that i cut away. I pushed the filament back in the bowden tube and I saw the filament flow through the hotend. So I think that the temperature and the thermocouple is working correctly. I made another print test at 225° and the PLA extrudes from the hotend now. Unfortunately, it didn't stick to the build area as the hotend appears to be to high. The extruded PLA was quite thin so it didn't fall down but it curled around the hotend nozzle. I think that this issue can be closed. This evening I will calibrate again the Z axis following the wiki and the suggestions I saw in other posts in this forums. I case of other issues I will ask again some suggestions. Thank you for your answers. PS: I measured again the extrusion length. Following a command to extrude 100mm, I measured an effective feed of around 105mm in the Bowden tube. Is it worth to calibrate this? Where I have I to do it? (I am using Netfabb and Ulticontroller).

I can confirm that rebooting the PC solved the issue. Thanks for the answer.

When I connect the Ulticontroller to my Ultimaker, is still possible to control the machine via USB? After connecting it, I managed for a while to control the machine with Printrun but after some time it crashed and after any tentative to reconnect failed with "Port already occupied" message.