DeltaFirmware can't be updated solution
When Delta refers to the update tutorial, the screen clicks on Settings - Firmware - Currently the latest firmware.
Two ways to help with updates
1. Change the name of the latest firmware to
AL_DELTA_G1.SDS
Reason: This is due to the fact that older versions can only recognize the same firmware name for iterative updates.
2. Download this link
https://drive.google.com/file/d/1hHOyYL0wUzCkcloNDbrwVrCgOZQN4XvQ/view?usp=sharing
Internal authors directly change the file name to: AL_DELTA_G1.SDS
Users of Delta laser engraving machine can directly refer to the upgrade file to update.