DIY and Entry-Level 3D-Scanner Forum

Hi,Bernhard.

I am glad you have prepard a new forum.
The turntable you've shown in your demo seems very interesting.
I've got one of the servomotor together with a reduction gear by Servocity, 7:1 ratio.

Arduino uno is connected to the servomotor as you demo'ed.
In your Arduino sketch, there are several statements requiring user selection, such as 1 or 2.
Since I am quite new to Arduino and programming, i am having hard time learning your code, version .05.
I'll appreciatte it if you could shed some light in the steps requring user selection of the Arduino code.

Best regards,

Bryan

Hi Bryan!

Attached please find V05 of the firmware with some commends:

#include <Servo.h>

Servo myservo;
int servoPin = 10;Put the yellow cable of your servo in output Nr 10 of the Arduino
int buttonPin = 2;No changes
float scancount = 1.0;No changes
int ch = 0;No changes

int microsdelay = 50;You can inrease this number, if the turntable should move slower

float rot_angle = 22.5;The turntable moves 22.5° each step. modify this if you like
float steps_0_deg = 1000.0;Run a test with your servo. This should be the 0deg position
float steps_360_deg = 1210.0;Run a test with your servo. This should be the 360deg position
float steps_per_angle = (steps_360_deg - steps_0_deg) / 360.0;No changes
int steps_next_cycle = 0;No changes

Then the code follows. No changes are needed from here on

_________________
Bernhard
www.virtumake.com

Hi, Bernhard.

I really appreciate your detailed reply to my newbie questions.

In your 'buttonPin=2' statement, is the Arduino Uno wiring supposed to already have the button physically installed and also have been pressed by the user in order to work properly?

------- From your instruction ----

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.

---
Sorry I do not clearly understand your step-by-step instruction.
I have installed David version 3.7 32bit on my PC running XP.

Thank you for you kind help.

Bryan

Hi Bryan!

No, problem Just to get you right. Are you building the VirtuCube 3-Scanner, or the project "Automated Arduino 3D-Scanner Turntable" (http://www.thingiverse.com/thing:37835).

There is a difference between both projects regarding the servo. VirtuCube uses a 360 deg servo. The "Automated Arduino .." uses a modified standard servo.

Both servos need a different firmware. My post above was for the VirtuCube firmware.

_________________
Bernhard
www.virtumake.com

Hi, Bernhard!

Thanks to your detailed reply, my confusion is cleared.
I am trying to follow your VirtuCube and V05(ino) Arduino sketch.

Thank you again,

Bryan.

Hi, Bernhard!

The V05 starts working slowly. I am in the process of adjusting the microsecond values corresponding to what I want.

At this moment, I opened DAVID3.5.1, a bit old version, instead of 3.7.1.
Would this pose any issues regarding the control or the communication between the Arduino Uno -Servo Motor and the PC?
Right now with DAVID3.5.1 running, the servo seems to turn quite slow compared to Arduino-only implementation without DAVID implementation.
As you indicated in your instruction, I checked the Com selection in DAVID's advanced setting.
The current PC is running WidowsXP 32bit.

Well, so many newbie questions.

Thank you for your help.

Bryan

Hi Bryan!

Your questions help other users a lot. Please keep asking

The turntable moves slower, because heavier objects tend to move on the turntable, if they are accelerated too fast.

Any version of David should be compatible with the firmware.

I forgot to mention that you need to tell David that the command "A" is used for saving a single frame. I'll update the building instructions.

Best,
Bernhard

_________________
Bernhard
www.virtumake.com

Hi,

This model DFR05SR
http://www.dfrobot.com/index.php?route= ... aeQOkrz6ho

Is a 360 servo or a modified standard servo?

I dont know how to difference them.

Thanks

So I have the arduino hooked right, newest firmware. I see the letter commands being printed int he 9600 serial COM in the arduino window, however my David scanning software is not responding to the commands.(ver. 3.4) I have also added command A to the list. Any ideas? does it have something to do with my "Newline" in the David scanning software being set to -1, or the UseDtrDuringScan set to off?

thanks,

Please make sure, COM communication is selected too.



Could you post a picture of your arduino setup ?

_________________
Bernhard
www.virtumake.com