Galvo value?

[polishedball]

No idea where these even came from, can someone tell me if they have any value to list on ebay or here for sale? Of if there just trash. No identify marks on them.

Thanks

[laserist]

They look like G124 galvos

[absolom7691]

G-124 open loop galvos. Pretty accurate for open loop. I would say they are about 4kpps as is and can do up to 12k with the accelerator 124 card (if you can find them). These are great for old school analog. When I first started out in lasers, these were as close to closed loop galvos as I could afford.

[mixedgas]

G124s. Same for me, best I could afford back then. Did a lot of shows with them. NML mirror mount on the one.

PM me, I collect them.

Steve

[absolom7691]

I ran these with my Laser Illusions PC Lite card. Mike Kenny at MWK got a box G124s and sold me a pair for $100 apiece which was a good price. I still have my Laser Illusions card. I have no idea where my 124s went. I think I have moved about 8 times since then so they probably got lost in the moves. I need to pull out some of my old stuff, including my XPY1000 Beamscan. I just need to build an open loop head for it.

[logsquared]

My first galvos as well. circa '96. Pair these with accelerator cards.... totally awesome. There is something really cool about the way torsion bar scanners perform.

[DZ]

Kinda neat to see how many other folks had similar starts in this. I had G-124's and a PCLite around 1994. This is about the best pic I could dig up, I remember my first projector was made of wood, so this one was probably from about 1995 or 1996. The G-124's were great scanners and I love the G-120's, but my favorite were the G-138's, just wish I could find more of them...

[absolom7691]

Kinda neat to see how many other folks had similar starts in this. I had G-124's and a PCLite around 1994. This is about the best pic I could dig up, I remember my first projector was made of wood, so this one was probably from about 1995 or 1996. The G-124's were great scanners and I love the G-120's, but my favorite were the G-138's, just wish I could find more of them...

Make your own! Take the cores out of the g-124s, unsolder the torsion pin from the rotor and solder it to a g120 rotor! I can't see why this wouldn't work. I have always wanted to try that.

[mixedgas]

I'm willing to bet that the G124 rotor IS the G120 Rotor. With care and some tooling you can press out the rotor from the top, and put it back in, one, maybe two times. I used to solder the torsion bars and replaced transistors inside the galvo when I was poor. Realiging the sensor zero to the mechanical zero using the set screw is tedious and requires an oscilloscope, if its too far off, the galvo oscillates.

Steve

[absolom7691]

The 124 rotors are definitely shorter than the 120 rotors. The 120 housings are taller than the 124s so I think the torsion rod assembly would work and not be too long for the grub screw to lock it to 0.