So..... Intense Pulsed Light cosmetic laser cosmetic systems use diode bar stack arrays of (almost always) 808 nm "off the shelf" wavelengths (presumably a side-channel that the industry uses to offload their specialized Mil Spec, high energy physics lab gear, and industrial thin disk laser pump...
Mixedgas: that one still has all the parts. I like the idea about the AO. That might have to be a future project to try.
Found 1 more mirror mount, but I have exhausted all my hiding places.
On the laser media amp, the LM343 op amp was a high voltage (up to + and - 35v) powered IC. It doesn't look like they are available anymore. I've looked to see if there are any newer equivalents but haven't found any yet. The other op amps TL074 or TL084 run off the 7815 and 7915 regulators. ...
Oh, so that's what they look like when intact. I was used to getting them parted out.
I've seen and salvaged Argon sleds, but never had my hands on the full HENE printer version.
BtW it's easy to mod a Xerox AO driver for analog in most cases. The AOs are fun teaching tools.
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Steve
Oh, so that's what they look like when intact. I was used to getting them parted out.
I've seen and salvaged Argon sleds, but never had my hands on the full HENE printer version.
BtW it's easy to mod a Xerox AO driver for analog in most cases.
Hold onto the gradient wheel, modern " no...
Awesome everyone.
Mixedgas: thanks for looking for the laser fantasy manual and the other info.
Lasermaster1977: thanks for the feedback and the laser media scan amp circuit. That will probably be my next build. And thanks for checking on the mirror mounts.
As I was looking to see if I...
So all of these are position feedback scanners (PD's) with one cable with coil wires and a second for the position feedback signals. Thanks for the ramp sweep video.
Using them with position feedback amps such as the GS A-601 or LM22SD amps would likely improve the phase shifting to some degree. ...
I have the manual for that LFI someplace. I have a three channel just like it in a 19" rack. I'm away from home office for a few days, but I will seek it out when I have time.
EC3 looks remarkably like the 601.
Google:
"Skywise optics reference area"
He kindly hosted some galvo stuff for me...
Just for kicks, here are the commercial scan amps I got.
EC3 - Got this from Gary at Electronic Counter back in the day. I still have the manual. Last time I used it 30+ year ago it worked, but oxidation has destroyed some of the traces. Scared to try it.
Laser Fantasy Driver Card: this...
Here is a freq ramp from low to 500+Hz. This is using the best and next best scan sets. Red = Best, Green = next best. I still have some noise in the system that I need to figure out where it is coming from.
Also, included picture of scan sets with mirrors and mounts
aah ha, so these are actually G-120PDs? or the newer 120Ps? So forget about my earlier schematic intended for non-PD GS scanners.
I agree with @mixedgas that the original GS A-601 position feedback scanner amps weren't all that. We used and preferred reproductions of the Laser Media LM22SDA...
True dat, but I included an extra pair of the same model of galvo that came from a company called Light Construction, that was Canada's first something-or-other laser graphics something-or-other. The galvos were mixed up when I sent them and I couldn't tell which was which, but that might have...
If you heat the back of the mount with a soldering iron the epoxy will melt and the mirror flicks off with a pair of pliars... Take the set screw out first. Keep the mounts, no one has made G style aluminum mounts in a decade or more.
There is a wire drill size that corresponds to the galvo...
Mirror standardization is important. Normally, those mirrors and mounts acquired from General Scanning, the X mirror would be a 7mm x 7mm x 1mm and the Y mirror would be 7mm x 11mm x 1mm.
Here is a photo showing these mirrors and their mounts. I've posted these and other photos on this forum in...
Lasermaster1977: good point. Since I am prototyping I haven't been giving much attention to standardizing mirrors and mount for consistancy, just using what I got laying around. I did purchase some scan mirrors on ebay last night 7.0mmx11.0mmx0.75mm, but I am limited on mirror mounts and would...
Okay, that's like my G-115 coils are paired. The two coils are wired in parallel.
That is difficult to say whether improved scan amp circuitry will help, much depends on the root cause.
What are your mirror sizes and thickness? Are all mirror mounts the same size and type?
I can offer...
Lasermaster1977: that makes a lot of sense.
Wiring: red/green paired and black/yellow paired.
With an improved scan amp circuit with some feedback, can some of that be compensated for or tweaked out?
Based on your "swappings" experiements, it points to differences in scanner pair responses to your amplified XY signals. G115/120 open-loop scanners all had ever so slight phase response differences, most were negligible but apparent. It could be anything from differences of mirror masses to...
I am perplexed with this balance issue and if I had enough hair I would be pulling it out. :D BUT this is one of the main reasons for doing this stuff - the true joy of learning how things work and problem solving.
Summary: both scan sets are getting the same singal from a single 4423. I...
They have been listing FAC corrected laser diodes for awhile now, have purchased some 525 nm FAC diodes from them in the past. Just was wondering what might be a good 638 nm diode to move down in wavelength :)
Mixedgas: thanks for the reply. I'll check the phases on the oscillators. I'm using teflon caps and polystyrene caps. I did not check for matched capacitance values though. Funny thing is that i still the the original paper datasheet for the 4423 with notes I wrote on it that I do not remember...