Yeah, it's just for my own amusement so it doesn't really matter that much, if it gets to be a problem I may be able to just take it apart and replace the pushbutton with a toggle switch, i'll keep my eye out for one that already has it though.
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ArcticMyst Security by Avery
Laser Harp laser
- Thread starter albuser
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Alright, keep us updated :san:
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I think a LAB laser is more than I really need, thanks for offering though
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It seems like it would be perfect. Its not big at all (quite small actually). And has a 100% duty cycle. Anyways I was just offering.
ARG
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The laser most definitely needs to turn on and off at high speeds (depends on the galvo speed) to produce the fan of multiple beams, otherwise it'll just be one beam producing a giant fan.
Look up "blanking" it will explain why the laser needs to be off.
http://nqlasers.com/scannerreference/index.php?title=Blanking
Think of it this way, you are projecting a dot pattern, without blanking the laser will fill the space between the dots, producing a straight line.
A lab style laser would be perfect for this project.
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If you'd be willing to let it go for cheap enough i'd probably be willing to buy it but i've got a pretty limited budget so I don't think I can offer you a fair price for it
But isn't that why i'm using a stepper motor? The speed of the motor in between each step should ensure that you don't perceive the laser in between each step, and due to persistence of vision you only see the beam at those specific steps. I haven't looked the code over thoroughly enough to see if that's indeed what it's doing that's just what I gathered from the instructions, I could be wrong though.
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Are you saying that a stepper motor is faster than a light beam and can move the beam through space so fast that it can produce blank spots, keep wishing.
I think light might be just a little faster than something mechanical :thinking:
Your going to need a laser with TTL capability if you want to do this project I believe, other wise you going to get one fan shaped beam out of your stepper motor.
I think light might be just a little faster than something mechanical :thinking:
Your going to need a laser with TTL capability if you want to do this project I believe, other wise you going to get one fan shaped beam out of your stepper motor.
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Haha not exactly, I just figured that since the stepper motor stays on the steps for longer it would reflect alot more light at those specific intervals and not so much in between them, there'd still be light reflected in between them but because it's not reflecting as much light as the steps you wouldn't see it nearly as clearly. It looks like he's using something with TTL in the first picture but later on I think he has a picture with just a regular handheld one.
ARG
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Stepper motors are pretty slow when compared to galvo's. The answer is yes, you will still see the beam in between the steps, though it will be dimmer.
uniman2
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so i was looking at the code given for this project. it has variables in it to control and store the state of the laser. This means the TTL laser is needed for this as said before. The laser turns of whenever motor moves and turns on when finished. hope this helps
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ARG
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with additional circuitry a handheld might be useable, but some handheld laser moduels can't be modulated fast enough since they are made for CW operation. Some drivers have soft start which would prevent modulation. You would then also have to deal with the short duty cycles.
The right laser for this job is a TTL or analouge lab style laser.
Your choice.
The right laser for this job is a TTL or analouge lab style laser.
Your choice.
ARG
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If you can wait for China you can find them cheaply.
532nm 70mW Green Module W H TTL Modulation Green Laser G50 Sepcial Offer | eBay
532nm 70mW Green Module W H TTL Modulation Green Laser G50 Sepcial Offer | eBay
