![[3D列印機] Ultimaker2-故障排除!](http://3dmart.com.hk/cdn/shop/articles/201603101843350.jpg?v=1779423864&width=1600)
Extrusion Issues
There can be several reasons for extrusion problems with the nozzle. The most common reason is a clogged nozzle, which prevents the plastic from being extruded smoothly or results in insufficient extrusion, leading to uneven or insufficient layer thickness during printing. We call this phenomenon "under-extrusion."
Nozzle clogs or inconsistent extrusion are often caused by dirt, charred filament stuck inside the nozzle, or other reasons. You can follow the steps below to troubleshoot the problem.
Feeder Motor
When the feeder motor exhibits the following phenomena, it indicates that you may encounter extrusion problems. For example, you may notice a "clicking" sound from the machine's feeder motor, and the feeding gear inside the motor digs into the filament, deforming or creating holes in it. This situation will cause extrusion problems. At this point, you must unload the filament, cut off the deformed section, and loosen the feeder motor's pressure as much as possible (for adjustment methods, please refer to [3D Printer] Ultimaker 2 - Maintenance and Care!). After adjusting, reload the filament.
Notes on changing filament: When changing filament, be sure to cut the feeding end at an angle to facilitate feeding. At the same time, pay attention to feeding the filament as straight up as possible to avoid misplacement of the filament, which can cause partial breakage and clog the feeder motor, leading to malfunction.
Moving Material
The Ultimaker 2 also offers a manual extrusion function, allowing you to easily clear clogs manually when the nozzle is blocked.
1. Turn the knob next to the panel to "Maintenance > Advanced > Move material" and press the knob.
2. Wait for the nozzle to heat up to the target temperature. Insert the 0.35mm cleaning needle into the nozzle for cleaning.
3. Rotate the knob to manually control the feeder motor for extrusion. During this process, you can also manually push the filament to aid feeding.
4. If the nozzle extrudes smoothly, it means the clog has been cleared, and you can now prepare for a new print.
Nozzle Cleaning Method
When there is larger dirt or charred filament inside the nozzle or heating block that cannot be removed by the methods above, it is recommended to use this method. Please refer to the nozzle cleaning method! in the article [3D Printer] Ultimaker 2 - Maintenance and Care! This is a simple but very effective method, and we also highly recommend using this method to clean the nozzle when switching from filament that requires a high operating temperature to filament that requires a low operating temperature (e.g., when switching from ABS to PLA).
PTFE Tube
After prolonged use of the Ultimaker 2, the PTFE tube in the extruder may wear out due to continuous exposure to temperature and pressure from the heating block, leading to slight deformation or damage, as shown in the figure below: The left side is a new PTFE tube, and the right side is a PTFE tube after prolonged use. A damaged PTFE tube will rub against the filament, causing inconsistent extrusion. If the above methods cannot solve the inconsistent extrusion problem, it means you may need to remove the PTFE tube for inspection. For disassembly instructions, please refer to the article [3D Printer] Ultimaker 2 3D Printer Extruder Disassembly Begins!
Error Messages
If an ERROR message appears on the small screen of your Ultimaker, you can follow the steps below to troubleshoot the problem.
Note! Before starting the troubleshooting steps below, always ensure the machine is turned off and the power cord is unplugged.
ERROR - STOPPED TEMP SENSOR
When this message is displayed on the screen, it indicates a problem with the PT100B temperature sensor wire in your machine, which is used to sense the nozzle temperature. When the sensor wire cannot accurately record the temperature, the machine will stop heating the nozzle for safety reasons. The reason for this message is usually either a poor contact between the sensor wire and the motherboard, or a damaged sensor wire. You can follow the steps below to check if the motherboard and sensor wire have poor contact.
1. Lay the Ultimaker 2 on its side so you can access the bottom.
2. You will see a metal cover on the bottom. Loosen the two screws on the cover to remove it.
3. Once the cover is removed, you will see the motherboard. Please check if the sensor wire (consisting of two thin red wires and one thin white or gray wire) is properly connected to TEMP1 and if all three thin wires are secure.
If it still doesn't work, it means your temperature sensor wire is damaged. The best way to check is with a multimeter. Normally, the resistance measured at room temperature should be close to 108 Ohm. If the temperature sensor wire is damaged, the measured resistance may be close to 0 or infinite. In this case, the temperature sensor wire must be replaced. For replacement instructions, please refer to the article [3D Printer] Ultimaker 2 3D Printer Extruder Disassembly Begins!
ERROR - STOPPED TEMP SENSOR BED
When this message appears on the screen, it indicates a problem with the temperature sensor wire of your heated bed. When the temperature sensor wire cannot accurately record the temperature, the heated bed will stop heating for safety reasons. This message usually appears due to either poor contact between the sensor wire and the heated bed or motherboard, or a damaged sensor wire. You can follow the steps below to check, starting with the sensor wire and the heated bed:
1. There are two small screws connecting the wires at the back of the heated bed.
2. Gently pull the wires to check if there are any signs of looseness.
3. If the wires are loose, loosen the screws and reconnect them.
Check if the sensor wire and motherboard have poor contact:
1. Lay the Ultimaker 2 on its side so you can access the bottom.
2. You will see a metal cover on the bottom. Loosen the two screws on the cover to remove it.
3. Once the cover is removed, you will see the motherboard. Please check if the heated bed sensor wire is properly connected to TEMP3.
If the error cannot be resolved after following the above steps, it is possible that your heated bed temperature sensor wire or the heated bed itself is damaged. In this case, please contact us.
ERROR - HEATER ERROR
When the "heater error" message appears on the screen, it indicates that the nozzle temperature sensor is not detecting a stable (heating) temperature signal. This could be due to a loose connection of the nozzle's heater wire or other reasons. To prevent the nozzle from overheating, the machine will shut off the heater wire's heating function. The following steps can help you check and troubleshoot the error:
1. Confirm that your Ultimaker 2's firmware is updated to the latest version.
2. Check if the metal shield at the front of the heater wire and the PT100B temperature sensor wire are fully inserted into the heater block.
3. Check that the nozzle is not touching the fan shroud. It should not be touching, as heat will be conducted away by the fan shroud if it is. This is the correct setup.
4. If this error message appears while you are printing a large, flat surface, it is possible that the airflow from the fan is bouncing back from the flat surface, causing the nozzle to cool down. In this case, you can reduce the fan speed to resolve this issue.
If the error cannot be resolved after following the above steps, please contact us.
X OR Y SWITCH BROKEN
This message indicates that the X-axis or Y-axis limit switch (located in the upper left rear corner inside the machine, with two small lever-like metal pieces) is not functioning properly when the print head is at its home position. In this case, please check the following points:
1. Manually move the print head to the rear left of the machine and see if it can press the small metal piece of the limit switch to make a "click" sound. If any of the limit switches are not functioning properly, you can manually bend the metal piece out slightly so that the print head can press the small metal piece of the limit switch to make a "click" sound.
2. If the print head cannot move to the rear left home position, it is possible that the X/Y axis pulleys that move the print head are loose. You just need to tighten them.
Z-SWITCH BROKEN OR Z-SWITCH STUCK
If either of these two messages appear on the screen, it means your Z-axis limit switch is not functioning properly. In this case, you can follow these points to check and troubleshoot the error:
1. First, at the bottom of the print bed, near the back panel, there is a small metal rod protruding downwards. It will contact the Z-axis limit switch located in the hole when the bed is lowered to the very bottom to home the bed.
2. Check for any foreign objects under the bed that might prevent it from lowering completely, or any foreign objects blocking the small hole where the Z-axis limit switch is located.
3. You can manually bend the metal piece out slightly so that the print head can press the small metal piece of the limit switch to make a "click" sound and operate normally without any issues.
Unable to Update Firmware
If Cura displays that it cannot recognize your Ultimaker 2 when you are trying to update the firmware, it means you may have encountered a software or hardware connection problem. You can easily find and solve the problem by following these steps.
Check Connection
1. Please ensure that the Ultimaker 2's power cord is properly connected and the power is turned on.
2. Please ensure that the USB cable connecting the Ultimaker 2 to your computer is properly connected, or you can try a different USB cable to confirm if it is working correctly.
Software
Software issues could be a bug in Cura itself, or your computer's operating system may be too old. We recommend the following two solutions:
1. Update Cura on your computer to the latest version.
2. Connect to another computer with a more updated operating system.
If neither of the above methods works, there might be a bug in the Ultimaker 2's motherboard. In this situation, please contact us.
Printed Object Not Sticking to the Platform
When your printed object doesn't adhere well to the print platform, there are usually two reasons: one is that the first layer of the print doesn't adhere well to the print platform; the other is that plastic itself tends to shrink when cooling. If the plastic you are using has a large shrinkage rate (such as ABS), it can cause warping at the bottom, especially at the corners of the object. Here are a few methods to help you improve these types of problems.
Heated Bed Temperature
Setting the heated bed to the correct temperature is very important for providing good adhesion for the object, as it prevents the first layer of the print from cooling too quickly and shrinking excessively. Generally, for PLA, the temperature is set to 60°C, and for ABS, it's 90°C. These are the default values for Ultimaker 2, but you can also adjust them within a certain range.
Print Platform Leveling
It is very important for the first layer to extrude well and adhere to the print platform. If the distance between the platform and the nozzle is too far, the extruded filament will not adhere well to the platform; if the distance between the platform and the nozzle is too close, the filament will not be able to extrude from the nozzle. For platform leveling, please refer to the Print Platform Leveling section in the article [3D Printer] Ultimaker 2 - Basic Operation!.
Glass Plate
When printing larger PLA objects, it is recommended to apply a thin layer of glue stick to the glass plate. When printing ABS objects, you can refer to the article [3D Printing Materials] Choose the Right Material to Solve Your ABS Warping Problem! Of course, cleaning the glass plate itself is also very important. For cleaning the glass plate, you can refer to the Cleaning the Glass Plate section in the article [3D Printer] Ultimaker 2 - Maintenance and Care!.
Setting Brim and Raft in Cura
For setting methods, please refer to points one and two in the article [3D Printing Materials] Choose the Right Material to Solve Your ABS Warping Problem!.
Article Source: https://ultimaker.com/en/support/11704-extrusion-problems
Translation:3DMART Ltd.