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Automated Arduino 3D-Scanner Turntable

by virtumake, published

Automated Arduino 3D-Scanner Turntable by virtumake Dec 15, 2012

Description

This automated turntable helps lazy people like me to get nice scans with a David Structured-Light Scanner.

The turntable in action: youtu.be/r2YUnTnl1cY

VirtuMake is an Open-Source project. Please donate, if you like my work and want to keep the further development of my Open-Source hardware going on. virtumake.com
Thank You :)

Recent Comments

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hey, do you think i would need a stronger motor if i wanted to scan
larger and a bit heavier objects than those you showed? i intend to scan
mainly SLR Cameras, for example the Nikon D600. And i also wanted to
ask if the wiring is possible on a normal circuit board rather than the
breadboard? Thanks
Thank you for your feedback! I hope you enjoy the turntable and get some nice scans :)
thanks for all the info. And thanks for the work on this project. Its pretty sweet, I had the whole thing working in 45 min. Seems like the pots that come with the servos are 100k. I'll increase my quality, on the David SLS scanner, I just used the default. I'll post my settings when I get home. Also for the servo, I removed the pot in the servo, removed the pin to allow it to spin 360 degrees, and I soldered an 10k resister between the wires in place of the pot.

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Instructions

Firmware udate: Version 0.4 -> wiring diagram did not match with the firmware. Thank you @andyman2000 for your feedback :)
*****
New firmware, Version 0.3, released!
*****

This is an instruction to build an automated Aruino Turntable

You need:

1) 1 Arduino Uno board

2) 1 10k Resistor

3) 1 10k Potentiometer

4) 1 Push button

6) 1 Servo Motor

7) The printed parts

8) A David-Laserscanner: thingiverse.com/thing:36989


Installation Instructions:

I) Remove the 180° lock from the servo as shown in: feh.osu.edu/Design-Project/References/servo.html

II) Put all parts together as shown in the wiring diagram.

III) Load the firmware (the -ino file) on the board


Operating Instructions:

Open your David-Laserscanner and activate the option: Seetings > Advanced Settings > Communication > COM > Enabled.

This function allows the Arduino board to send commands via the USB connection to the David-Laserscanner.

The turntable has 3 modes:

Mode 0) Nothing happens :)

Mode 1) If you push the button, the turntable starts to rotate. Now you can adjust the angle of the rotation with the potentionmeter. No scans will be made in this mode.

Mode 2) Once you are satisfied with the rotation angle, push the button again. The table will stop to rotate for 5 seconds. Move away and let the table do its work.

It will rotate, then send a signal to the David scanner. The scanner will make a picutre of the object and save the file. If the scanner is finished, the table makes the next move aso.
hey, do you think i would need a stronger motor if i wanted to scan
larger and a bit heavier objects than those you showed? i intend to scan
mainly SLR Cameras, for example the Nikon D600. And i also wanted to
ask if the wiring is possible on a normal circuit board rather than the
breadboard? Thanks
Just one question before I look at the code, is there a way to make this thing go faster. It seems to spend a lot of time just waiting before rotating. Seems like I could speed this up 50 percent. Can I turn down the scandelay variable?
Yes, you could reduce this value. In my setup, the whole scanning process in high quality takes about this time. If you reduce quality, have a higher frame rate aso, you can reduce the value wihout interrupting the scanning process.
thanks for all the info. And thanks for the work on this project. Its pretty sweet, I had the whole thing working in 45 min. Seems like the pots that come with the servos are 100k. I'll increase my quality, on the David SLS scanner, I just used the default. I'll post my settings when I get home. Also for the servo, I removed the pot in the servo, removed the pin to allow it to spin 360 degrees, and I soldered an 10k resister between the wires in place of the pot.
Thank you for your feedback! I hope you enjoy the turntable and get some nice scans :)
Actually just got it to work. Still unsure of value of the pot used BUT I just noticed that the wiring diagram doesn't match the firmware pin assignment. Diagram shows pin 13 But firmware sets it for pin 11. Also pin 3 is used for button input but firmware uses pin 2. Make sure you make any changes to adrino code before uploading.
Thank you for your feedback. I updated the firmware to version 0.4
what size pot did you use? And besides removing the 180 lock on the servo, did you just out right remove the pot in the servo? I tried this and my servo just moves way too much. Is this designed for the futaba? I'm using hitec. I presume it should be the same pwm.
Hi the pot is 100 kOhm. Regarding the servo pot, I just removed the top part, so it does not move anymore.
Hi! The potentiometer is 100k Ohm. Regarding the servo, I just removed the part on the top of the potentiometer, so it does not move anymore.
Great!
I have DAVID-3D with Beamer, but no 3D-Printer. I would like to build the turntable, so i ask:
- where can i get/download a partlist?
- where can i get/download the Arduino Software?
- is there somebody around here who can/will build me the whole thing, at least the 3D-Printer Parts?
Hi, I uploaded the files to shapeways. Everybody can now let the files be printed!

shapeways.com/model/843768
Removing the 180° lock is genius! That sounds like a very cheap turntable with only few components. 
Frankly, I didn't even know that a servo has such a lock ;)
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