Understanding Tevo Tarantula Flashing Lights
The Tevo Tarantula is a popular 3D printer known for its affordability and ease of use. However, like any piece of technology, it can encounter issues. One of the most common problems users face is the dreaded flashing lights. These blinking lights are more than just an aesthetic issue; they’re a signal that something is amiss, potentially disrupting your printing process. Understanding what causes these flashing lights is the first step toward resolving them and getting your printer back to producing high-quality prints. This guide will delve into the most common causes and provide actionable fixes to get your Tevo Tarantula back in optimal condition.
Common Causes of Flashing Lights
Identifying the root cause of the flashing lights is critical for an effective solution. The issues can range from simple power supply problems to more complex firmware or hardware failures. Recognizing the signs of each issue will help you efficiently troubleshoot the problem. Let’s explore the common culprits that trigger these blinking lights on your Tevo Tarantula and how to approach each one with targeted solutions. Proper diagnosis saves time and prevents unnecessary component replacements, ensuring your printer operates smoothly and reliably for every project.
Power Supply Issues

The power supply is the heart of your 3D printer, providing the necessary energy for all components to function correctly. When the power supply fails or experiences issues, it can lead to erratic behavior, including flashing lights. It’s important to understand that a faulty power supply can damage other components, so swift diagnosis and repair are essential.
Checking the Voltage
Begin by checking the voltage output of your power supply using a multimeter. The Tevo Tarantula typically requires a 12V or 24V power supply, depending on the model. Ensure the voltage output matches the printer’s specifications. If the voltage is consistently below the required level, the power supply is likely failing and causing the flashing light issue. Also, inspect the power supply for any physical damage, such as bulging capacitors or burnt components. Replace the power supply if any damage is found or the voltage is unstable.
Replacing the Power Supply
If the power supply is indeed faulty, replacement is necessary. Disconnect the printer from the power source and carefully remove the old power supply, taking note of the wiring connections. Install the new power supply, ensuring all wires are correctly connected according to the manufacturer’s instructions. Double-check all connections to prevent shorts or improper power delivery. Once connected, power on the printer to see if the flashing light issue is resolved. Make sure to use a power supply unit (PSU) with the correct voltage and amperage specifications to ensure proper functionality and safety.
Firmware Problems

Firmware, the software that controls your 3D printer’s hardware, can sometimes cause problems like flashing lights. Corrupted or outdated firmware can lead to erratic behavior and malfunctions. Regular updates and occasional re-flashing can resolve many of these firmware-related issues, ensuring your printer operates correctly. Consider this a crucial maintenance step in keeping your Tevo Tarantula running optimally.
Updating Firmware
Check the manufacturer’s website for the latest firmware version for your Tevo Tarantula model. Download the firmware and follow the instructions provided to update the printer’s firmware. Typically, this involves connecting the printer to your computer and using a firmware update tool. Ensure your printer remains connected to the power source during the update process to avoid interruption. A successful update can fix bugs and improve the printer’s performance, often resolving flashing light issues.
Re-flashing the Firmware
If updating the firmware doesn’t resolve the issue, consider re-flashing it. Re-flashing involves completely rewriting the firmware on the printer’s control board. Download the latest firmware and use an appropriate flashing tool, often included in the printer’s software package. Follow the instructions carefully, making sure the process isn’t interrupted. Re-flashing can resolve corrupted firmware issues and restore your printer to its original operational state. After re-flashing, recalibrate your printer to ensure accurate printing.
Wiring and Connection Problems

Loose or damaged wiring can disrupt the flow of electricity and cause the Tevo Tarantula to malfunction, resulting in flashing lights. This can stem from vibrations during printing or general wear and tear. Thoroughly checking all connections and wires can often pinpoint and fix these types of problems, ensuring the printer receives a stable electrical supply.
Checking the Wiring Connections
Inspect all wiring connections, including those to the power supply, hot end, heated bed, and stepper motors. Ensure all wires are securely connected and that no wires are frayed or damaged. Tighten any loose connections and replace any damaged wires. Pay close attention to the connections on the control board, as these are prone to loosening over time due to vibrations. Regularly inspect and maintain these connections to prevent future issues.
Examining Stepper Motor Wires
Stepper motor wires are critical for precise movements in 3D printing. Inspect the wiring to the stepper motors for any signs of damage, such as cuts or kinks. These wires can be damaged by repeated flexing or being caught in moving parts. Replace any damaged wires to restore proper motor function. Also, ensure the connectors are secure and properly seated in the control board. Replacing or re-seating these wires can often resolve issues where the printer is not moving as expected or where the flashing lights appear.
Motherboard Issues

The motherboard is the brain of your 3D printer. Issues with this critical component can cause various problems, including flashing lights. Identifying the cause of these issues can be complex, but checking the motherboard and its components is a crucial step in the troubleshooting process.
Identifying Motherboard Problems
Examine the motherboard for any visible signs of damage, such as burnt components, cracked traces, or bulging capacitors. Check the connectors for corrosion or loose connections. If you have experience, test the voltage regulators and other components with a multimeter. Carefully look for any unusual odors, as this can also indicate a problem. If you are not comfortable with these tests, seek assistance from a qualified technician.
Replacing the Motherboard
If the motherboard is faulty, replacement is usually the best course of action. When replacing the motherboard, ensure you get a compatible model for your Tevo Tarantula. Carefully disconnect all the wires and connectors from the old board, taking photos or making notes to help you with the reassembly. Install the new motherboard, connecting all the wires to their correct positions, and double-check all connections. Once the new motherboard is installed, flash the firmware, calibrate the printer, and test to ensure everything functions correctly.
Software and Configuration Errors

Incorrect software settings and configuration errors can also lead to problems, including flashing lights. These issues may arise from faulty slicer settings or corrupted G-code. Reviewing and adjusting these settings can often resolve these issues and get your prints back on track. Make sure you have a clear understanding of your printer’s capabilities and limitations to ensure optimal performance.
Slicer Settings
Slicer settings significantly affect your printer’s behavior. Incorrect settings, such as excessively high temperatures, incorrect bed leveling settings, or improper movement speeds, can cause issues. Review your slicer settings and ensure they are appropriate for the filament type you are using and the specific design you are printing. Adjust these settings as needed and test a small print before attempting a large project. Calibrating your slicer settings can optimize print quality and minimize issues.
G-code Issues
G-code is the language your printer uses to understand print instructions. Corrupted or improperly formatted G-code can lead to printing errors and flashing lights. Ensure your G-code files are generated correctly by the slicer software and are compatible with your printer. If you suspect a G-code problem, try re-slicing the model or using a different slicing profile. You might also consider testing the model on a different printer to isolate the issue.
Preventive Maintenance Tips

Regular maintenance can prevent many flashing light issues and extend the life of your Tevo Tarantula. Keeping your printer clean and well-maintained will minimize problems and keep it running smoothly. Incorporating these simple steps into your routine will save you time and frustration.
- Keep the printer clean and free of debris
- Regularly lubricate moving parts
- Check and tighten screws and belts
- Store filaments properly to prevent moisture absorption
- Perform routine calibration checks
