IFD:PhysicalComp2011/Yunshui Jin - Revision history

JinYunshui: /* Step 4 Building the Gears */

2012-05-27T10:19:22Z

Step 4 Building the Gears

← Older revision		Revision as of 10:19, 27 May 2012
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	====Step 4 Building the Gears====		====Step 4 Building the Gears====
	Use the gears of the Lego parts. The detailed pictures showed below.		Use the gears of the Lego parts. The detailed pictures showed below.


			<videoflash type=vimeo>42917722</videoflash>
			<br><br>

	[[File:laser_step9.png\|800px\|]]		[[File:laser_step9.png\|800px\|]]

2012-05-27T09:40:17Z

Code to Download

← Older revision		Revision as of 09:40, 27 May 2012
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	*[http://www.david-laserscanner.com/wiki/user_manual/scanning_without_background David scanner Manuel to scan without background]		*[http://www.david-laserscanner.com/wiki/user_manual/scanning_without_background David scanner Manuel to scan without background]
	*[http://www.david-laserscanner.com/forum/viewtopic.php?p=8289#p8289 A hobbyist built up his own 3D scan hardware for David system ]		*[http://www.david-laserscanner.com/forum/viewtopic.php?p=8289#p8289 A hobbyist built up his own 3D scan hardware for David system ]


	~~===Code to Download===~~
	~~[[Media:Code of Stepper(test).zip\|Stepper code test]]~~

2012-05-27T09:39:37Z

EHP - 3D Scaning Project

2012-05-27T09:39:08Z

EHP - 3D Scaning Project

2012-05-27T09:38:49Z

EHP - 3D Scaning Project

← Older revision		Revision as of 09:38, 27 May 2012
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	==EHP - 3D Scaning Project==		==EHP - 3D Scaning Project==
			[File:Laser_step0.png]

	<br>		<br>
	It's a project involved with 3D Scan.		It's a project involved with 3D Scan.

2012-05-27T09:37:11Z

How To & My Process

← Older revision		Revision as of 09:37, 27 May 2012
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	Click the “Calibrate” button to finish calibration. Notice that once you finish the calibration, the position of the camera can’t be changed anymore.		Click the “Calibrate” button to finish calibration. Notice that once you finish the calibration, the position of the camera can’t be changed anymore.

			====Step 7 First scan====
			Now everything is ready. We could start our first scan. Do remember to check the “Record new motion “option. One important thing is you need to re-adjust the camera setting, unlike the calibration picture, now you need to achieve a picture as black as possible while only the laser line could be easily recognized ,and you can also adjust the laser focus to make it as thin as possible. Like the picture showed below.

			[[File:laser_step13.png\|700px\|]]

			====Step 8====
			Once you finish the first scan. We can do the repetition scan. Just make sure the relative position of the laser and the camera is fixed and we can remove the calibration board to scan anything we want. We now finish the mobile laser scanner.
			Here is some demo scan result from the official David site (from the commercial version) .

			[[File:laser_step14.png\|700px\|]]

	===Related Links To That Topic===		===Related Links To That Topic===

2012-05-27T09:33:22Z

Step 6 Camera calibration

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 ====Step 6 Camera calibration====
 Make the calibration board, which has two perpendicular wood boards with the right pattern. The calibration pattern to be printed out for the board can be found [[Media:Laser_printout.zip|here]]].
 [[File:laser_step10.png|600px|]]
 ===Related Links To That Topic===

2012-05-27T09:30:12Z

Step 6 Camera calibration

← Older revision		Revision as of 09:30, 27 May 2012
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	====Step 6 Camera calibration====		====Step 6 Camera calibration====
	Make the calibration board, which has two perpendicular wood boards with the right pattern. The calibration pattern to be printed out for the board can be found [Media:Laser_printout.zip\|here]].		Make the calibration board, which has two perpendicular wood boards with the right pattern. The calibration pattern to be printed out for the board can be found [[Media:Laser_printout.zip\|here]]].
	[[File:laser_step10.png\|600px\|]]		[[File:laser_step10.png\|600px\|]]

2012-05-27T09:29:27Z

How To & My Process

← Older revision		Revision as of 09:29, 27 May 2012
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	Notice that the switcher for triggering the stepper is removed from the circuit. David software will send ‘S’ through the serial port when the start button is clicked, and ‘T’ will be sent if the stop button is clicked. In order to synchronize the software with the hardware, a function of triggering the stepper by receiving ‘S’ and ‘T’ is written in the code.		Notice that the switcher for triggering the stepper is removed from the circuit. David software will send ‘S’ through the serial port when the start button is clicked, and ‘T’ will be sent if the stop button is clicked. In order to synchronize the software with the hardware, a function of triggering the stepper by receiving ‘S’ and ‘T’ is written in the code.
	Complete code with very detailed comments can be found here.		Complete code with very detailed comments can be found here.

			====Step 6 Camera calibration====
			Make the calibration board, which has two perpendicular wood boards with the right pattern. The calibration pattern to be printed out for the board can be found [Media:Laser_printout.zip\|here]].
			[[File:laser_step10.png\|600px\|]]

	===Related Links To That Topic===		===Related Links To That Topic===

2012-05-27T09:25:09Z

Step 2 Software Installation

← Older revision		Revision as of 09:25, 27 May 2012
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	Find the Arduino code [[Media:TestCode.zip\| here]].		Find the Arduino code [[Media:TestCode.zip\| here]].

	Note: 9V external power supply is necessary for driving a stepper. The USB power supply is not sufficient since it has a current limit.		Note: 9V external power supply is necessary for driving a stepper. The USB power supply is not sufficient since it has a current limit.
	Do please turn off the power supply, if you want to exchange the connection of the 4 pins of the stepper. Or it may damage your circuit because it may generate an inverse voltage.		Do please turn off the power supply, if you want to exchange the connection of the 4 pins of the stepper. Or it may damage your circuit because it may generate an inverse voltage.