GK3 Ultra- Solution for Layer Lines Issue Caused by the Heater
Dear Users,
We've identified and addressed an issue related to heating-induced layer patterns appearing on prints when using the GK3 Ultra in low-temperature environments. Please follow the steps below to implement the recommended solution.
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1. Steps to Apply the Solution
Step 1: Remove the Cooling Fan
Please follow the fan removal tutorial video to safely remove the bottom cooling fan from
your printer.
Step 2: Upgrade the gcode File
• Download the latest gcode update file.
• Copy the file to the root directory of a USB drive.
• Insert the USB drive into the printer and select the gcode file from the screen.
• Tap “Print” to begin the upgrade process.
A progress bar will appear on the screen. The machine will reboot automatically once
the upgrade is complete.
2. Background and Explanation
Cause of the Issue
In low-temperature environments, fluctuations in the printer's heating temperature affect the
efficiency of the resin's curing reaction, leading to uneven curing and resulting in visible
surface artifacts on the printed object.
Solution Details
1. Firmware Update
o Heating Logic Optimization: The temperature variance has been reduced
from around ±2°C to within ±0.5°C, ensuring a more consistent resin
temperature.
o Displayed Temperature Adjustment: The displayed temperature now
reflects the sensor reading plus 5°C, offering a more accurate representation
of the resin's actual temperature. This compensates for the sensor's position
near the edge of the tank, which tends to read lower than the central printing
area.
2. Fan Removal
Removing the bottom cooling fan minimizes the inflow of cold external air, further
stabilizing the internal temperature and reducing the likelihood of surface artifacts
caused by rapid temperature shifts.
3. Why Must the Fan Be Physically Removed?
Due to the current hardware design, the fan cannot be controlled or disabled through
firmware. Therefore, manual removal is necessary to fully implement the heating optimization
strategy.4. Will Removing the Fan Affect Cooling or the Printer’s Lifespan?
No. UniFormation internal lab tests have confirmed that removing the fan does not
compromise the machine's performance or longevity.
Under a controlled environment of 29°C with 10 continuous hours of intensive printing, the
monitored maximum component temperatures were:
• LCD screen: 39°C
• Mainboard: 40°C
• Light source: 43°C
All are well within safe operational ranges. Therefore, removing the cooling fan will not affect
the printer’s reliability or lifespan.
Thank you for your continued support. If you have any questions or need further assistance,
feel free to contact our support team.
— The UniFormation Team
