im normalen zustand (funktion) ist DISABLE signal negative spannung. diese negative spannung ist auch an katoden D1,D2 und D4. wenn OVERPOSITION SHUTDOWN schlagt, VPOS ist mehr als +5V oder weniger als -5V, dann kriegt mann eine positive spannung an pin 7 U6D oder pin 8 U6C. Dann ist auch ...
Is clear that chinese CT clones are cheap and some of them performs well :-) When I started with this "project" few years ago, situation was not like today.
Anyway it's a challenge for me and makes fun. I'm posting results just to let people know. Maybe there are more "freaks" like me ...
ilda test pattern running 28Kpps @ 8° optical (+/- 4°) doesn't look bad,
but if you look at X and Y pulses, there is little over and undershoot visible.
G120Amp10 is working. ILDA Test Pattern is running well 24Kpps @ 20° optical (+/- 10°). Parts CC,RC,CN,RN mentioned in enclosed schematics must be added to PCB according enclosed picture. H-Bridge is stable. Details about design in enclosed simulation using TinaTI (free).
update zu G120Amp. einige besserungen sind da. zur zeit nicht getestet, aber if hoffe ich werde bald zeit zu testen haben. hauptsache ist funtionalitat von h-bridge.
verbesserungen: - high frequency damping is weg (wirklich nicht notig fur G120D) - eingang ist simpler - pre-emphasis ist zu ...
I also think it's all about temperature control. Using simple PID controller it's not so difficult to have temperature stability of 0.1°C. I'm not the scientist. I treat myself more as application engineer. I used only public available resources and designed PID temperature controller ...
Really nice work the new CNI driver with possibility of cooling/heating.
But:
On original driver (9pol connector) is NTC thermistor and TEC connected with one common wire which is conntected to GND. This is same for LD and also for crystal. See enclosed picture.
Ich habe dieses problem auch mit 7915 von ST gehabt.
79xx von ST muss man zuerst belasten und dann OUT spannung messen !
Das habe ich schon ausprobiert und es hat funtioniert.
Iout cca 20mA dann messen (min. ist 5mA).
Ich probiere auf deutsch. Ich habe nur kleine anderungen gemacht und ILDA test bild lauft schon bei 18K pps bei 20 deg. optical. Wie ich gelesen habe (http://www.meos.com/PDF/ENP28.pdf) kann G120D bei 40 deg. optical (peak to peak) nur 12K.
Can you shortly explain what is the purpose of using H Bridge to drive
Galvos ? In Audio amplifiers it is used to have higher voltage swing at output load.
This is probably an old topic, but I'm using LSD1000 on Amiga 1200
without any problems. Of course blanking is not available But you can
still produce nice show with it. If somebody needs help regarding Amiga, let me know, I'm an old AmigaFreak.
"You should keep the laser well cooling down with a heatsink, and also you'd better operate it within 4 hours continuously, then rest the laser. That will be good for the laser."
They didn't send me manual. All specifiactions are on their website.
I'm from Slovakia, I'm 29 years old electrical engineer, and I started to build my first laser projector one year ago. My budget is not very big so at the moment I use laser head from Viasho VB-150 532nm, open-loop scanners G124 driven by Accelerator 124 Amps. I'm pretty old Amiga Freak so I ...