DLPLCR65EVM: DLP LightCrafter 6500 Software not properly displaying masks with "Load" feature

Hi Tristan,

Is bit map files order listed properly in text file you load.

Can you try loading sample file provided with the software bundle and confirm the behavior. After loading add_72.txt file, Update LUT, Start, On the DMD you should See numbers incrementing from 0 to 71.

Use Pattern On-The-Fly mode, Set exposure time to 2000000uS

Could you please explain this " I have set the timing setting values to ones that have worked before so this should not be the problem " in detail.

Please share Bitmap, saved Text file, GUI Screen shots to understand problem in detail.

Thanks,
Shivakumar

Hi Shivakumar,

Yes, the order of the files should be correct, and I believe the file and filenames contained are formatted correctly. I have attached a compressed version of the file which contains the .txt file instructions and the bit maps themselves. They should all have a bit depth of 1 as well.

The DMD is not easily visible with how it is set up in our instrument, so I can not see what the mirrors are displaying themselves, but I can see the light reflected from them. I tried uploading the add_72.txt file, updating the LUT, pressing start and I did not see any change in the light reflected. I used “Pattern On-The-Fly Mode” with 2 second (2000000us) exposure and 1 second (1000000us) dark time. This is the same problem I had with my masks (it seems as if the DMD is not changing at all, it is essentially reflecting all light impinging on it.

The sentence referring to the timing settings means that I have used “exposure” and “dark time” values which have worked on the DMD using the “Pattern On-The-Fly Mode” and “Add Pattern” (as opposed to “Load”) to upload the bit maps.

It is very odd that the bit maps are uploaded to the LightCrafter GUI in the correct order, but they do not seem to be properly translated to the DMD. I have attached screenshots showing the files and how they are uploaded to LightCrafter.

The DMD is working properly (transitioning through the bit maps listed in the GUI with proper timing) when I use “Pattern On-The-Fly Mode” and “Add Pattern” but the problem is the bit maps are not uploaded to LightCrafter in the order I want (the order in which they are in the file).

Unfortunately, I am now experiencing a lot of problems with LightCrafter itself. The software keeps becoming unresponsive “(Not Responding)” in Windows. Also, the software is having trouble picking up the DMD even after I have reconnected the power and USB cables multiple times (this could be a problem with many USB devices linked to my one computer, I am not sure).

Thanks for the help,

TristanBit Map 1 (1920x1080_step10).zip

One note. I am not using an external trigger to change the maps currently (although it is checked in the GUI screenshot). I have the set up exactly the same for the "working" testing using "Add Pattern" to upload bit maps and the "not working" testing using "Load" to upload bit maps.

Everything is working perfectly now! Thank you for all of the help!

I believe the problem was that with the "Load" feature used to upload the bit map sequence, you must press "Select All Patterns" and when using the "Add Pattern" feature to upload the bit map sequence, all bit maps are automatically selected. I am sorry for this small oversight. Also, the updated hardware seemed to fix the connectivity issue.

Best,

Tristan

Hi Tristan,

Thanks for the confirmation. This will be helpful to other users as well.

Thanks,
Shivakumar