Automatic 360° Scanning Rig

Automatic 360° Scanning Rig

Postby aazd » Wed Jan 20, 2010 8:37 pm

Rig for automatic scan (with textures) of an entire object, all you have to do is place the object and press scan.
The software and hardware communicate using the com port, See the list of commands/messages in the advanced settings in the David Laserscanner software.

Here's a video we made.. we made it more action than information, because we got bored with wathcing most of the "look what i built" videos out there :roll: Clicky hery: http://www.youtube.com/watch?v=mIcd4f8dz-Y

If you're interested there' a disgustingly messy flowchart (with the wrong commands :oops: ) of the flow of communication at:
http://moore.dk/billeder/David_3D_Serial_Com_Flowchart.png

The "control" part of the hardware will eventually be made on a single PCB, and we're thinking of selling it... (cheap of course :)
The PIC µC was programmed in embedded C, using Microchips MPLAB.

The frame of this Setup was inspired by the "aufbau" video from http://youtube.com/user/sehertest , We made some adjustments so that it can run in a lighted room.


The Hardware is based on a PIC24 µC, (PIC24HJ128GP502)
an FTDI chip serial for communication with PC, (MM232RQ)
an RC servo for turning the laser,
a step motor for turning the scanned object using an A3967 step motor controller.

The whole rig is powered by a standard PC PSU,

It took about 8 weeks to complete.

We aren't using a webcam because we didn't have proper x64 drivers for it :)

Comments and questions are welcomed!
aazd
 
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Postby hal » Sat Jan 23, 2010 12:32 pm

Hello and Compliments aazd,

your "scan box" seems very well done 8) and the light-system for texture shooting is perfect.
The only criticism is: you need to fit more better the calibration sheets with markers with the object.
In the video we see an object placed in the lower side of the camera view, and it is too small in relation with the whole camera view.
You can achieve better results and get more details if you move the object in the center of calibration sheets and use (for the object used in the video) markers with a lower scale vaue. More fitted with the object's size.

aazd_correction_dimension.jpg

Furthermore I suggest to brush the laser line, on the object, only one time in one direction, but veeery slowly, instead move it quickly and many times.

Regards,
Mattia
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hal
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Location: Cavaria con Premezzo (VA), Italy.


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