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Old 01-11-2009, 01:42 PM #1
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Default I'm Building a DIY-HDD XY-Scanner

Hello there!

In this thread i will post my current Project, a cheapest-of-the-cheap XY scanner!

I used:

2 Harddisks
Audio Amplifier
laser pen
rubber bands ^^
PC for generating frequencies

is a experimental setup, and excuse my messy room, i'm a messy person ^^

As mirrors i simply hacksawed the disk in the HDD and glued it to the arm.
as those arms have no center fixing, i fixed them with rubber bands in a "0" Position

i hooked the coils up to an audio amp, and generated simple waveforms with goldwave

im still looking for free software, that can use a "sooundcard dac" for simple patterns

here's a picture of the basic setup

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Old 01-11-2009, 01:43 PM #2
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Default Re: I'm Building a DIY-HDD Scanner

and one night shot cause its cool
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Old 01-11-2009, 01:45 PM #3
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Default Re: I'm Building a DIY-HDD Scanner

thats a square i projected at estimated 8K (PPS) as i dont have working software for now
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Old 01-11-2009, 01:52 PM #4
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Default Re: I'm Building a DIY-HDD Scanner

very very nice work ! I've never thought of this before , I have some freeware that generates sound signals if you want to try that ?

i'd love to see how good this is with laserboy and a soundcard DAC ;D
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Old 01-11-2009, 01:52 PM #5
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Default Re: I'm Building a DIY-HDD Scanner

you can just simply hook this setup to an ordinary audio source,

but i didn't find the right kind of music jet, because it needs some difference in the left/right channel. if there isnt much stereo, you'll mostly get circles.

see this: http://ussr.at/laser/DSCN0448.MOV (43 mb!)

if anyone could reccomend me some free easy software i could use, i would be very happy

i will keep you all up to date in this thread
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Old 01-11-2009, 01:56 PM #6
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Default Re: I'm Building a DIY-HDD Scanner

Quote:
Originally Posted by Diachi
very very nice work ! I've never thought of this before , I have some freeware that generates sound signals if you want to try that ?

i'll try everything ^^ link?
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Old 01-11-2009, 02:30 PM #7
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Default Re: I'm Building a DIY-HDD XY-Scanner

http://www.softplatz.com/Soft/Audio-...r/SineGen.html

it has stereo control, square, triangle and sine wave at &gt;20KHz.

-Adam
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Old 01-11-2009, 02:55 PM #8
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Default Re: I'm Building a DIY-HDD XY-Scanner

looking nice just a small note u should make your mirrors a lot smaller
this wil increase the scanning speed a lot
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Old 01-11-2009, 04:24 PM #9
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Default Re: I'm Building a DIY-HDD XY-Scanner

Quote:
Originally Posted by laserfreak3d
looking nice just a small note u should make your mirrors a lot smaller
this wil increase the scanning speed a lot
that is true, but smaller mirrors require more precise alignment. as for now the harddissk are just lying around, this is not an easy task. i will also shorten the arms for less interia.

could anyone point me to software i could use? i tried ********* but i only get ouput in the settings, with the test patterns. if i try to run some file/show, there is no output. is there a manual?


laserboy i dont get at all

thx for the generator, i got some nice spiropatterns out of this. but i need more ^^
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Old 01-11-2009, 04:29 PM #10
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Default Re: I'm Building a DIY-HDD XY-Scanner

Quote:
Originally Posted by wummi
[quote author=laserfreak3d link=1231684938/0#7 date=1231689351]looking nice just a small note u should make your mirrors a lot smaller
this wil increase the scanning speed a lot
that is true, but smaller mirrors require more precise alignment. as for now the harddissk are just lying around, this is not an easy task. i will also shorten the arms for less interia.

could anyone point me to software i could use? i tried ********* but i only get ouput in the settings, with the test patterns. if i try to run some file/show, there is no output. is there a manual?


laserboy i dont get at all

thx for the generator, i got some nice spiropatterns out of this. but i need more ^^[/quote]

yeah the generator is quite good for spiro type patterns

laserboy, I don't even know if the creator of that quite understands it yet ;D

-Adam
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Old 01-12-2009, 02:59 AM #11
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Default Re: I'm Building a DIY-HDD XY-Scanner

nice work i made one of those one night and smoke'd it. epic fail . you got to be careful of the volume here's the vid http://www.youtube.com/watch?v=qPX111b-G-g
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Old 01-12-2009, 12:32 PM #12
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Default Re: I'm Building a DIY-HDD XY-Scanner

thanks for the advice, for now i'm powering them at 0.5W max.

the problem is, the arms dont return to zero fast/precise enough. i guess rubberbands just dont cut it

how do real galvos work this?

has someone built somethin like i did here?
im thinking of giving each coil a DC offset, maybe 2V, an modulate from 1V to 3V with 2 being the zero point. anyone think that will work ?!
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Old 01-12-2009, 03:41 PM #13
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Default Re: I'm Building a DIY-HDD XY-Scanner

i also made one with some simple 555 timer circuit's here's the test vid it work's ok i still have not finish'd it yet
http://www.youtube.com/watch?v=lyxWUwxxX0w
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Old 01-12-2009, 04:14 PM #14
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Default Re: I'm Building a DIY-HDD XY-Scanner

hey dtmf, how did fix the arms? rubberbands too? or springs?
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Old 01-12-2009, 04:50 PM #15
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Default Re: I'm Building a DIY-HDD XY-Scanner

i use'd some small spring's . i had the same problem too . the 555 timer help'd alot

here's a speed test vid
http://www.youtube.com/watch?v=JQNrW_ruSaE
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Old 01-12-2009, 05:04 PM #16
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Default Re: I'm Building a DIY-HDD XY-Scanner

so what did you do with the 555? some kind of pwm?
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