U Disk Not Recognized by the DSP

U Disk Not Recognized by the DSP

Preface: This article covers some reasons why a U-disk (USB Memory stick) may not be read by the controller

Problem description:

The machine cannot recognize the U-disk, and LCD panel show no U-File when you choose Read U-disk file. 



Possible Reasons:

1. The U disk type

The U disk can be recognized by machine:

Disk Max capacity：16Gb（including 16Gb and below）

The U-disk interface protocol is 2.0 


Note: How to judge the protocol of U disk

Insert the USB in the PC/laptop , check in the device manager of the system and check USB port, it will show USB2.0/USB3.0 

USB2.0 have four pins, two for power, one pair for data.

USB slot which contains black-USB2.0



Solution:

Change to a  USB 2.0 U-disk for testing. 


2. The file format is incorrect

-The file on the USB stick must be exported by RDWorks/Lightburn/Lasermaker of type .rd. It is not the same as the project file. Please check if you saved the file correctly.




Solution:


Please save the file with correct way. A video is for reference.


Using U-Disk With Thunder And LightBurn - YouTube


3. The U-disk is faulty

Solution:

Please replace a new U-disk for testing.


4. The U-disk port on the outside is faulty

If the U-disk and file format are all good, maybe the U-disk on the outside is faulty.




Solution:

Please plug the U-disk to the U-disk port of the controller board ( Open the left door you can see it), see below picture.


If it’s working after you plug the U-disk in the controller board, it maybe the U-disk port of the left side is faulty. 


Here is more on that:

5. Too Many RD files on the U-disk, Odd Symbols or File Names too long

Limit the number of RD files on the disk to under 90 and avoid odd symbols or having the file name longer than 8 characters.

File name example:
12345678.rd



6. Files not Saved to Root\Main Directory

Files must be in the root, main directory of the usb stick. Not in a folder.

File is saved into D:\--Will work   (Note that your USB drive may have a different Drive Letter Like E,F or G etc)




File is saved into D:\Lightburn RD Files --Will not work  (Note that your USB drive may have a different Drive Letter Like E,F or G etc)





Only reads the File that was in the Root Directory:

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