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Old 10-30-2009, 04:05 AM #33
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Default Re: building first scanner, need help

that would be right..


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Old 10-30-2009, 04:07 AM #34
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Default Re: building first scanner, need help

ok. so u think that i could get it calibrated right by doing it that way? and u think it really hard to do so?
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Old 10-30-2009, 04:16 AM #35
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Default Re: building first scanner, need help



is this how its suppose to hook up to the galvos? and which ones are positive and negative?

Last edited by canonfx1; 10-30-2009 at 04:22 AM.
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Old 10-30-2009, 04:17 AM #36
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Default Re: building first scanner, need help

TBH I haven't seen that many people try, so I can't say it's all that hard, no, but the few I have seen try weren't successful as I recall. I always use my scope, so I've never tried to use a meter..
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Old 10-30-2009, 04:23 AM #37
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Default Re: building first scanner, need help

Quote:
Originally Posted by canonfx1 View Post


is this how its suppose to hook up to the galvos?
Close, but not quite. Each one of those wires is the positive side of the input signal. The galvos negative side will be connected to ground on the correction amp board. So the X galvo + signal is the blue wire, the X galvo - signal is ground. The Y galvo + signal is the white wire, and the Y galvo - signal is ground. On the correction amp inputs (the pins on the other side of the correction amp where the signals from the sound card come in) you only use one wire to connect each incoming sound card channel, so only the blue and white wires in that picture are for X and Y. You only need to use two wires on the correction amp outputs. Once you get the parts, if you assemble it precisely as I describe in the tutorial, you shouldn't have any problem. The channels are already routed.
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Last edited by ElektroFreak; 10-30-2009 at 04:26 AM.
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Old 10-30-2009, 04:28 AM #38
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Default Re: building first scanner, need help

which board is the correction amp side? and what is the ground wire the orange?
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Old 10-30-2009, 04:31 AM #39
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Default Re: building first scanner, need help

You really need to read the tutorial thoroughly. I have already typed all that once, and it's all in there. I don't really feel like typing it all again.
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Old 10-30-2009, 04:40 AM #40
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Default Re: building first scanner, need help



ok i think i got it now? is this right?
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Old 10-30-2009, 04:42 AM #41
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Default Re: building first scanner, need help

there ya go!! absolutely right.. You won't have to worry about that with the correction amp since it will supply the grounds, you just need to connect those grounds on the sound card to the correction amp as described in the tutorial, the correction amp then supplies the grounds to each channel. I will warn you that if you attempt to drive your galvos with the sound card by itself (no correction amp) you won't have much success. The galvos might move a little, but the picture they draw would be the size of a postcard at 20 feet..
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Last edited by ElektroFreak; 10-30-2009 at 04:47 AM.
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Old 10-30-2009, 04:54 AM #42
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Default Re: building first scanner, need help



so would be ok if i connected it like this on the same side?

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Old 10-30-2009, 02:06 PM #43
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Default Re: building first scanner, need help

I don't see why not..
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Old 10-30-2009, 02:33 PM #44
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Default Re: building first scanner, need help




i labeled the calibrating board with numbers 1-12. Which are the pots that I need to adjust to calibrate it? i was a little confused when i read this in the tutorial.
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Old 10-30-2009, 02:40 PM #45
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Default Re: building first scanner, need help

You'll notice that there are 6 sets of two pots. Each channel has an offset pot and a gain pot. you'll need to adjust both of these for Ch.1 and 2. In your picture, you'll adjust 1 and 4 for Ch.1, and 2 and 5 for Ch. 2. I wrote the tutorial under the assumption that the reader would already have the necessary parts on hand so they can see the labels.
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Old 10-30-2009, 02:47 PM #46
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Default Re: building first scanner, need help

ok ic. so the when i have the multimeter hooked up i would connect it to the positve and ground for the x and y to adjust it to 5 volts?
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Old 10-30-2009, 02:55 PM #47
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Default Re: building first scanner, need help

First you'll observe the voltage on each channel without max.wav playing and set the offset so that the meter reads 0V. Then you'll play max.wav and set the gain so that each channel reads 5V.
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Old 10-30-2009, 04:05 PM #48
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Default Re: building first scanner, need help

ok i c. just rapping things up here. so the galvos connect to there own seperate amp (2 amps)? the the wires that come off the amp (+) (-) ground. i ignore the ground and connect the (-) (+) to the sound card like i have in the picture?
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