My Ultimaker is having extrusion problems. No or not enough plastic is released from the nozzle.
The nozzle or another hot end part could be (partially) blocked by dirt or burned material. Preheat your Ultimaker to 250C and try to push the filament through manually. If the blockage is removed you can continue printing, preferably at a temperature of 250C for the first 10 minutes to clean out any residue.
If there is still no plastic being released from the nozzle, take the following steps. Preheat your Ultimaker to 210C (for ABS use 250C) and retract the filament a little bit, so that it’s not in the nozzle anymore. Take some pliers to unscrew the nozzle and next push the filament through manually. Is it coming out smoothly? In that case the blockage is in the nozzle and it might have to be replaced. If there is still no plastic coming out of the hot end, the blockage is caused by a different part. In either case, please contact our Support team for further assistance.
The hot end of my Ultimaker is leaking. There is plastic forming on top of the aluminum heater block.
The cause of this issue lies in the assembly process of the Ultimaker. It means that the hot end parts are just not tightened enough, through which there is a small opening for the plastic to come out. You can solve this easily by taking the following steps, but please do it carefully!
First, preheat your Ultimaker to 210C (for ABS use 250C). Loosen the long thumb screw that goes through the front right corner of the print head a little bit, so that you can better reach the hot end parts. Now, take 2 pliers - with one you hold the aluminum heater block and with the other one the PEEK isolator. Keep the aluminum heater block on its place and slightly tighten the parts by turning the PEEK isolator with the pliers towards you. Make sure you do this very carefully! If you tighten it too much, the hot end isolator tube will break. When you are finished you can tighten the long thumb screw again and continue printing.
In case you need further help you can get in touch with our Support team, who will get you back on track again with your Ultimaker.
Prints get skewed and it looks as if the print head is moving a little bit more towards one side after each layer.
The most common causes for this issue are loose pulleys or belts. Therefore we recommend you to first check all the pulleys (10 on the axes, 1 on the X-motor and 1 on the Y-motor). Make sure they are extra tight and are not able to move at all. Next, check if the belts are not too loose, especially the short belts on the X- and Y-motor need to have a good tension. You can improve the tension of the short belts by loosening the 4 screws of the motors a little bit, sliding down the motor and tighten the screws again. If this doesn’t solve the problem and you are still experiencing problems, please contact our Support team.
I’m having problems with connecting my Ultimaker to Cura via USB.
This problem could either be caused by the computer, Arduino or electronics board.
First, try to connect with Cura on a different computer. If it still doesn’t connect, we need to figure out if it’s the Arduino or electronics board that is causing problems.
Go to the bottom of your Ultimaker and loosen the electronics from it (the cables can stay connected). Now, carefully take off the Arduino from the electronics board. Put the USB cable in the Arduino and connect it with your computer. Is the connection being established now?
- No: the Arduino is causing the problem. To be sure try it again on another computer and if it still doesn’t connect a new Arduino is needed.
- Yes: the electronics board is causing problems. Put the Arduino back on the electronics board and remove all the other cables and stepper drivers (please note their orientation!). Try again to make connection with Cura. If there is still no connection, the electronics board is broken. If it connects, it means that one of the external components interferes. To figure out which one it is, they need to be connected one by one.
Once you have established what is causing the problem, or you need further assistance, please contact our Support team.