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Ok. Me and Mr.Guzzlebucket(Bottle of Islay Scotch) have spent some quality time together this evening and my options are "walk around the room pretending to be a modern day cyber-pirate" or vomit all over this thread. Since I can't find my tricorn, this thread better wear some scuba gear.
If you want to skip the fluff, here is a general summation: "But hey, at least they are cheaper, in all definitions of the word, than Camtech!"
I've never met a Chinese scanner I've *really* thought "Wow! How did they kidnap a Camtech engineer!"
But thats never stopped me from trying to desuckify these things.
I have never played around with a set of the laughably named scanpro's but galvos are, at the surface, pretty simple devices with damn near identical designs so this should be pretty easy.
Mark my words: Irony being what it is, there will be a Chinese company in the future named "Ultra Super Perfect 120K High Speed Laserist Servo For Great Justice Inc".
As scanners age they go limp, unfortunately Pfeizer has not made a Viagra variant for them but we can get pretty close with the tuning pots. The difference between GS, PI, Camtech and Chinese galvos is the rate in which and how they age.
To make up for this aging problem you get access to tuning potentiometers that can, in effect, clue-by-four a galvo back in check.
Now, with regards to most chinese galvos they just visually copy the design of a Camtech 6800 without really understanding why the specific parts are there, hence why you see a lot of shit floating around.
They replace the expensive narrow source LED's with commodity canners, they replace ideal bearings with commodity japanese ones, photo detectors are not in ideal locations, the rod's are commodity "Whatever they can get their fucking hands on" n40-ish magnets, end caps are press fit. Magnet wires are hand wrapped, shoved, and epoxied to to the shaft without even a thought of thermal dissipation, much less the totally creepy vector field known as magnetic flux. Im getting fucking tired of seeing "Butterfly" galvo windings. ITS CALL THE RIGHT HAND RULE, MOTHERFUCKERS. Dont even get me started on these pieces of shit they call mirrors.
In short, I believe that somewhere during the construction an engineer says "Meh, It looks like a cambridge, close enough." and calls it a day.
I and the bottle of scotch have read a ton of threads here about scanpros(haha) here and I would be willing to bet the bearings are going to shit in quick order.
Very gently actuate the mirrors from one stop point to the other, you should feel some friction there.
If you do, they either used commodity bearings or didn't load it right causing torsional stress, either way the product is the same, the balls in the raceway are being eaten alive and flaking off steel into the raceway which interestingly enough(from my perspective) accelerates the degradation of the galvo.
Another possible theory is that the epoxy they used is also commodity and got soft under the heat and sprayed everywhere. By the powers of Greyskull^H^H^H^H^H^H^H^H^HScience the epoxy ended up in the bearings and basically coated the raceway in the mechanical equivalent of a sandpaper condom.
Honestly, I use DT40's. 1/3 the price of Camtech and 80-ish percent the same. The other 20% accounts for all the little quirks, which in my not so humble opinion are work-around-able given the cost. We have a history and yes, I am biased. Ohh, and I like my HFD pot when I gut that useless notch filter thank you very much. And one more thing, "x thousand points per second" is this industries version of the "megapixel" it really doesn't mean much but gives people a friendly variable to base purchases on.
Now before you get your knickers in a knot, xKpps *means* something to cambridge, they really do use the term on the straight and level.
Ohh, the bottle wants me to "spare a word" for Cam now. The synthetic ruby bearings need to have a come back tour. I understand you have a vested interest in keeping your bitches in check and coming back for more blow but really... Seriously... What the fuck.
China is really good at doing a couple things: 1) doing exactly what you tell them and 2) having a populace large enough to make SMT machines not "economically viable". Let that sink in for a second and then think of the consequences of not telling them "exactly what you want"
Or not. Either way, I can't find my tricorn. Yar.
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