simplest 3d scanner, Take 2!

thingiverse

Very simple: You will need a stepper motor, a 3d printer, those two printed parts, and an android cell phone or tablet. A line laser is also required, similar to one found at http://www.ebay.com/itm/650nm-5mW-Red-Laser-Line-Module-Focus-Adjustable-Laser-Head-5V-good-/381374426229?hash=item58cbafec75g. You should download and install the scan3droid app, which is available for around $5 at https://play.google.com/store/apps/details?id=com.gsohler.scan3droid&hl=en_US. It's a good idea to disconnect one of the x motors from your 3d printer and replace it with the new scanner motor, or prepare a parallel plug so that both motors can move together when the scanner is installed. Next, determine how many mm represent a complete revolution of the stepper motor by using software like Pronterface and counting the number of mm before a full revolution is completed. For me, this value was 40mm. Now send a G92 X0 command to reset the x coordinate to zero without triggering an end stop. Then send a G1 X40 F20 command. In this command, x represents the previously determined number of mm for one complete revolution, and f represents the desired speed. Adjust as necessary if it moves too fast or slow. Ideally, a complete revolution should take around 50-55 seconds. Attach the camera lens to the cell phone mount at the marked position, which provides a convenient 30-degree angle between the laser and camera. Use a heat gun to shape the phone support to fit your specific cell phone model. Once prepared, open scan3droid and follow its on-screen instructions for capturing video footage of an object using laser triangulation scanning technology. While the app has some limitations, it does provide a workable solution for generating digital 3D models from real-world objects. To achieve better results, perform some post-processing adjustments as necessary.