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We all know that CT 6800 and CT 6210 are capable of these speeds.
Most output hardware supports these speeds.
But.. I've seen a lot of laser displays, but none of them seemed to have these scan rates.
Who does actually use these speeds?
Who did really tune his amps to these speeds?
Who makes animations with frames containing more than 2000 points.
Is there someone out there who has a '60kpps graphics' file folder ?
Probably King Pango and... well... http://www.technfun.com/smilies/icon_noideas.gif that's probably it... http://www.technfun.com/smilies/icon_hmm2.gif
Bill Benner makes some good points *against* tuning your galvos to these higher speeds in this thread. (Scroll down to around May 20th or so.)
Those higher scan speeds are helpful if you're trying to display raster images, but since most of the ILDA art is already set up with 30kpps in mind, you're better off displaying it at that speed.
Adam
the faster speeds got pushed when laser graphics where the rage. The fact is you really dont need it. Best example I can give for using it would be if you where using a 3d max type program with the pangolin plug in converter- for those files- You might experiment with pushing the limits - Most everything has been done in 30k however and to facilitate file swaps most people tend to stay there.
BTW I can get 40k out of g120's using the old turbotrack amp designed by king pango-
Damn... I thought the old 120's were originally only certified to 24Kpps. I know folks pushed them to 30Kpps with some sucess, but I never heard of anyone driving them all the way to 40Kpps!
Guess that turbotrack amp that Bill designed is pretty awesome... (Well, no one ever said he was a dummy.)
Adam
Hi,
G120 40k using turbo track -> at which optical angle ?
G120 has max 40deg. optical AFAIK
pishtak
Welcome to PhotonLexicon, Pishtak!
I don't know exactly how wide you can scan a set of G120's at 40Kpps, even if you do have the very nice Turbo-Track amps. But my guess would be around 6 degrees optical. For sure you'll never get the full 40 degrees at that speed. (For that matter, you'll never get anything close to 40 degrees at that speed no matter which galvos you have...)
Standard angle at 30Kpps is 8 degrees optical for most galvos, though recently I've found that you can push that up to around 15-20 degrees with certain newer models.
Adam
Quote:
Originally Posted by Buffo
Yes,I agree
raster images need higher speed
Does anybody know, what is maximum "safe" scanspeed xx PPS for G120
at it's maximum possible scan angle ? (40deg.optical).
(I mean how fast can be ilda test pattern scanned at max. angle of G120)
Stefan
Hi Stefan,Quote:
Originally Posted by pishtak
Unlike the moving magnet scanners (Cambridge 6800 and its derivatives), the G120 has no thermal limitation to worry about. Even at maximum current, the scanner will only be required to dissipate around 2 watts. And if your scanner amps put out a nice clean signal, you will never wear out the bearings.
On the TurboTrack, we used to get 30K or greater out of G120 scanners. The question is, how good are your scanner amps? If you have really good ones (like the TurboTrack), then you can get some decent speeds, rivaling 6800 and derivatives. If you don't then frankly you will be lucky to get 12K out of them (which was the industry standard speed for more than a decade)...
Best regards,
William Benner
guys that know, could you list some scanner models and links like
starter scanners
medium scanners
pro scanners
out of this world scanners.
it would be good to see whats out there and what the daddy of scanners is?
Hi William,Quote:
Hi Stefan,
Unlike the moving magnet scanners (Cambridge 6800 and its derivatives), the G120 has no thermal limitation to worry about. Even at maximum current, the scanner will only be required to dissipate around 2 watts. And if your scanner amps put out a nice clean signal, you will never wear out the bearings.
On the TurboTrack, we used to get 30K or greater out of G120 scanners. The question is, how good are your scanner amps? If you have really good ones (like the TurboTrack), then you can get some decent speeds, rivaling 6800 and derivatives. If you don't then frankly you will be lucky to get 12K out of them (which was the industry standard speed for more than a decade)...
Best regards,
William Benner
Thank you for reply. My own built amps for G120 (see my homepage
or this article) allow me to scan ilda test pattern:
15K @ 40 deg. optical (max. for G120),
20K @ 20 deg. optical (half of max.),
24K @ 8 deg.
I tried to achieve 18K @ 40 deg. without success yet, but it doesn't
matter, maybe some day :-)
I heard about TurboTracks a lot (these days hard to get, I think LSDI
stopped production). How fast can G120 with TT scan the ilda test
pattern @ max. angle (40 deg. opt.) ?
Did you have experience with LOBO Amp-3 ?
Best Regards,
Stefan
Phishtac, you kinda hijacked my thread about using 50++kpps speeds :-(
No harm done.
Anyway, where did you get those pcb's from, and what is the estimated cost of the components? These amps seem affordable, small and fast. I Still have six G120 galvos (x&y with shift-blanking ) around that I would like to bring back to life.
Hello bart,Quote:
Phishtac, you kinda hijacked my thread about using 50++kpps speeds :-(
No harm done.
Anyway, where did you get those pcb's from, and what is the estimated cost of the components? These amps seem affordable, small and fast. I Still have six G120 galvos (x&y with shift-blanking ) around that I would like to bring back to life.
Sorry for that, wasn't my intention to do it :(:o . I just used the chance
to get some answers.
I designed the PCB's myself and PCB manufacturer here in Slovakia
manufactured them for me. There are no critical parts in. LM675T and
relay were the most expensive parts (together around 30$). Parts for one
amp costs slightly above 50$ I think. I didn't make exact calculations.
My intention was not to make money with it (complete schematics and
PCB in Eagle v3.55 is available per e-mail) ! I worked on it to see if I'm
able to do it, to have some amps for G120 I have, and to help others
which have G120 just laying around :) . I saw many not so successful
attempts to built something similar.
Best Regards
Stefan
PS: If you are too angry on me, let's move the discussin from "your"
thread to this one
here is a little something for your viewing pleasure- turbo trac scan amp-
50k modded will run g120's or cambridge 6800"s-