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Old 11-03-2008, 04:57 AM #49
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Default Re: Using jayrob's build but im having a problem

ok wow i was soooooo dumb. i was twisting the top metal turner, but i realized that the plastic inner screw was actually the lens for focusing. ok so i can twist it and focus it to a very tiny dot at like 6 inches to like 3 or 4 feet even. when its dark i put it in the floor and u can see the line that the laser actually is and follow it to the dot. i tried to melt something black but it did nothing. so is my diode still working correctly and if so then how must i adjust it so that i can melt black plastics and such? btw thx for the help.


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Old 11-03-2008, 05:02 AM #50
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Default Re: Using jayrob's build but im having a problem

Quote:
Originally Posted by chaosfourever
ok wow i was soooooo dumb. i was twisting the top metal turner, but i realized that the plastic inner screw was actually the lens for focusing. ok so i can twist it and focus it to a very tiny dot at like 6 inches to like 3 or 4 feet even. when its dark i put it in the floor and u can see the line that the laser actually is and follow it to the dot. i tried to melt something black but it did nothing. so is my diode still working correctly and if so then how must i adjust it so that i can melt black plastics and such? btw thx for the help.
If you can see the beam, it sounds like it is working fine. *Do you remember what you set the current at? *Did you try burning some black electrical tape? *Are you able to hold the laser very steady? *Try lighting a match with the head colored black by a sharpie type pen.

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Old 11-03-2008, 04:14 PM #51
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Default Re: Using jayrob's build but im having a problem

so far i cant cut electrical tape even when i get the focusing perfect. i used the lm317t with to-220 body and 2 10ohm resistors connected to that with the positive wire to the LD comin off of the ADJ of the lm317t. for the resistors i have the gold band closest to the vout leg and the red bands closest to the ADJ leg. Also my resistors are 1/4 watt. is this not enough wattage? for the 1n4001 i got the top silver tiny band closest to the positive LD terminal and the black part closeset to the negative LD terminal where it is connected. for my cap i have the short pin connected to the neg LD terminal and the long leg to the positive LD termional. is all of this right or do i have one of them backwards?
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Old 11-03-2008, 04:18 PM #52
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Default Re: Using jayrob's build but im having a problem

Based on the two 10 ohm resistors = 20ohms=>62mA. If you want to, you could probably only use one 10 ohm resistor for 125mA which would yield significantly more mW.
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Old 11-03-2008, 04:27 PM #53
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Default Re: Using jayrob's build but im having a problem

ok i put the 2 10 ohms in parallel so that they would equal a 5ohm one. also for my lm317t if you look at the front where the metal top tab is in the back then i used the far right leg as ADJ the center as vout and the left as vin. this is what the back said using the one from radioshack but i feel that it is backwards. so is my lm317t correct? is my resistor direction good? and do i need to use 1/2 watt resistors instead of 1/4 watt? as just a side note im using 22 gauge solid wire rated to 300 volts 1/64 pvc, its a little stiff but i should be able to work around it better in the end hopefully.
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Old 11-04-2008, 04:42 PM #54
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Default Re: Using jayrob's build but im having a problem

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Old 11-05-2008, 12:12 AM #55
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Default Re: Using jayrob's build but im having a problem

omg omg omg. i switched my stuff around and it works!!!!! i burnt tape and lit a match. awwwwww so happy. finally so much work its so damn cool awwwww. thx a ton to jayrob and daguin!!!!!!!!!!!!!!!!!!!!!
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Old 11-05-2008, 01:03 AM #56
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Default Re: Using jayrob's build but im having a problem

Quote:
Originally Posted by chaosfourever
omg omg omg. i switched my stuff around and it works!!!!! i burnt tape and lit a match. awwwwww so happy. finally so much work its so damn cool awwwww. thx a ton to jayrob and daguin!!!!!!!!!!!!!!!!!!!!!

It's a cool feeling, isn't it? 8-)

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Old 11-05-2008, 04:14 PM #57
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Default Re: Using jayrob's build but im having a problem

i was thinking. now that i have some experience i wanted to make a blu-ray laser. i saw that i can get good PFR-803t from daedal but what host and such should i use? any good suggestions?
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