• State Resolved
  • Locked Locked
  • Replies 8 replies
  • Answers 2 answers
  • Subscribers 29 subscribers
  • Views 1110 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DLP Lightcrafter EVM

Jon Bhattacharya
Prodigy 120 points
Other Parts Discussed in Thread: DLPC300

Can a DLP Lightcrafter  help extract a point cloud of a target surface with an intent to reverse engineer it and eventually create a 3D print.

If there is a process or procedure, where can I find it for my use. Only then I can decide to buy the product.

  • 0
    TI__Expert 6370 points
    Hi Jon,

    Yes, you can design a 3D scanning system using the DLP LightCrafter. You can check out this TI Design for schematics, a bill of materials, test data that we received from the design and other helpful documents. The software does generate a point cloud (.xyz) which can be used and converted to create a 3D print. That said, I should mention that this is not meant to be an end-product 3D scanner, it is meant for evaluating designs, or helping you to design your own 3D scanning system for generating point clouds.

    Best regards,
    Trevor
  • 0 in reply to Trevor Dowd
    Prodigy 120 points
    Hi Trevor,

    I have reviewed the documents. They are very good. But now my question is what version of DLP would I use and the number of cameras.
    Would I use one or two (2) and what is the make and model? I think the whole set of informations will change if I use two(2) cameras.
    Anxiously, awaiting your response.

    Thanks, --- Jon
  • 0 in reply to Jon Bhattacharya
    Prodigy 120 points
    Hi Trevor,

    I am still waiting for your response. My urgency is stemming from the very fact that we are trying to design a 3D scanner which is depending on the projector and the camera we select. So your response is very important to us.
    Thanks, --- Jon
  • 0 in reply to Jon Bhattacharya
    TI__Expert 6370 points

    Hi Jon,

    There are a number of factors that should be considered in your design:

    1) Choice of DLP Chipset/Evaluation module (EVM)

    The choice of EVM  and ultimately the choice of chipset you use affects the size of the design, the brightness of the scan, the resolution of the patterns and point cloud, the speed of the scan, the cost of the design, as well as other factors. Three EVMs and corresponding chipsets see most commonly used in 3D scanning applications (in order of increasing resolution) are:

    DLP LightCrafter - DLP3000 DMD, DLPC300 controller, 3D scanning TI Design

    DLP LightCrafter 4500 - DLP4500 DMD, DLPC350 controller, 3D scanning TI Design

    DLP LightCrafter 6500 - DLP6500 DMD, DLPC900 controller, 3D scanning TI Design

    The TI Design pages have all of the software, design files, test data, and the bill of materials (including part numbers) for the design.

    2) Choice of camera and configuration

    The choice of the camera and the camera configuration affects the resolution and quality of the point cloud as well as the speed of the scan. To satisfy sampling rules (like Nyquist Theorem), you should double sample the projected patterns in the x and y direction. This means that ideally, your camera would have 4 times the resolution as your projector. This is not absolutely necessary, especially given the price of high speed, high resolution cameras, and is not strictly followed in our 3D scanner TI Designs, but it gives you the best results.

    We generally choose to use global shutter cameras because they are easier to use with 8-bit grayscale patterns, but rolling shutter cameras are also possible.

    Using two (or more)  cameras is possible and you can change the code in the SDK to create this design. Some benefits of a two camera design is that you get a fuller point cloud, and you reduce the number of shadows (or occlusions) in the point cloud. The resulting point clouds are generated and calculated in the same coordinate plane, so given a great system calibration, you can merge the point clouds without complex stitching algorithms. Check out this video demonstrating a design with two cameras and one projector.

    Best regards,

    Trevor

  • 0 in reply to Trevor Dowd
    Prodigy 120 points
    Hi Trevor,

    I have already bought the DLP Lightcrafter EVM but I am yet to receive all the accessories for the Module.
    Would you kindly let me know how I can purchase them?
    Anxiously waiting for your response.
    Thanks,
    Jon Bhattacharya
    CEO/CTO
    BEI Systems Inc
  • 0 in reply to Jon Bhattacharya
    TI__Expert 6370 points

    Hi Jon,

    I'm not sure which accessories you need for your application. The power cord part number can be found in section 5.6 of the DLP LightCrafter EVM User's Guide. Other interfaces like USB cords can be found online. Section 1.5 covers recommended SD card specs. Let me know if there are any accessories in particular about which you have questions.

    Best regards,

    Trevor

  • 0 in reply to Trevor Dowd
    Prodigy 120 points
    Hi Trevor,
    I have bought most of the components from the bill of materials. But can you please let me know where I can get the camera mount as mentioned in the BOM. Will be waiting for your response. Thanks, -- Jon
  • 0 in reply to Jon Bhattacharya
    Prodigy 120 points
    I have a DLP Lightcrafter EVM machine. But I need help or any suggestion to install certain micro-chips like DLP3000 and DLPC300.
    They have been provided loose. I need to install them on my DLP Lightcrafte EVM. Can somebody suggest any help.
    Thanks, --- Jon