It's crucial to power off the printer before performing any maintenance work on the printer and its electronics, including tool head wires, because leaving the printer on while conducting such tasks can cause a short circuit, which can lead to additional electrical damage and safety hazards.
When you perform maintenance or troubleshooting on the printer, you may be required to disassemble some parts, including the hotend. This process can expose wires and electrical components that could potentially short circuit if they come into contact with each other or with other metal or electrical components while the printer is still on. This can damage the electronics of the printer and cause further damage.
Therefore, it's essential to switch off the printer and disconnect it from the power source before doing any maintenance work. This will prevent any short circuits or damage to the printer's electronics. By doing so, you can avoid potential damage to the printer's electronic components and ensure that the maintenance work is performed safely and effectively.
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The common cause of printer tripping is usually due to the presence of leakage in other electrical appliances in the household (within standard range), combined with the printer's own leakage (also within the standard range). When the total leakage exceeds the threshold of the leakage protector, it will result in tripping.
The leakage of the Bambu Lab printer complies with the IEC62368 safety standard, with leakage current limited to half of the maximum limit specified by regulations.
If your printer has leakage or tripping issues, please ensure that the printer and the electronic household meet the following three requirements:
Please perform a continuity test using a multimeter. Connect the red probe of the multimeter to the metal casing or frame of the printer (press firmly to ensure a good connection, avoiding interference from surface paint). Connect the black probe to the middle pin of the triangular power plug at the back of the printer. If the grounding is good, the multimeter will indicate continuity.
Next, plug the provided power cord back into the machine. Keep the red probe in the same position and connect the black probe to the middle socket of the plug on the power cord. If there is no continuity, it indicates a problem with the power cord. If continuity is established, it indicates that the printer's grounding is good.
Before proceeding with any troubleshooting, please first check the wiring of the AC control board in the printer. The printer has two wiring ways (both compliant with the IEC 62368 safety standard). Using the wiring on the right side may reduce leakage current, but both wiring ways have leakage current within regulatory limits.
After meeting the above three requirements, please proceed with troubleshooting based on the situation you encounter.
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The heatbed is a high-voltage device, and it's possible for the aluminum substrate of the heatbed to have leakage issues. It's common for household appliances, such as computers, to have a certain level of leakage. The leakage current of the Bambu Lab printer complies with the GB4341 and IEC62368 safety standards, with the leakage current limited to half of the maximum regulatory limit.
If you need to use multiple printers simultaneously, it may cause the total leakage current to exceed the threshold of the leakage protection device and result in tripping. After consulting with a professional electrician, it is recommended to upgrade the leakage circuit breaker or install dedicated leakage circuit breakers for the printers.
For users with printers powered by 220/230V, if you need to use multiple printers simultaneously, it is advisable to install a transformer that converts 220/230V to 110V with the assistance of a professional electrician. It's important to note that using a transformer doesn't guarantee that tripping won't occur, but increasing the capacity can reduce the risk of tripping.
In this situation, it is highly likely that the fuse has blown, and you will need to replace the fuse.
We hope that the detailed guide we shared with you was helpful and informative.
We want to ensure that you can perform it safely and effectively. If you have any concerns or questions regarding the process described in this article, we encourage you to reach out to our friendly customer service team before starting the operation. Our team is always ready to help you and answer any questions you may have.
We will do our best to respond promptly and provide you with the assistance you need.