USB Scannersafety

[Gento]

google RTFM :

in Deutsch

Die Abkürzung RTFM steht in geschriebenen Dialogen für "Read the fu*piep*ing manual", zu deutsch etwa "Lies das got*piep*erdammte Handbuch!".
Damit wird ausgedrückt, dass der Angesprochene gerade eine nach Ansicht des Beantworters reichlich dumme Frage gestellt hat, die annehmen lässt, dass er lieber andere mit Fragen nervt, als sich selbst in ein Thema einzuarbeiten.

*g*
Gento

[greenalien]

Andy_con - the main point of this device is to shut off the beam if your scanner power supply fails, as this can't be monitored by laser control software. If you never do audience scanning, you don't need one, otherwise they're a good idea. They have the secondary bonus of detecting any badly-programmed display figures where the dwell point, for example on corners, is too long, which are another way the audience can get over-exposed. In my view, such devices should be compulsory on any projector over 100mW.

[-bart-]

Is there a way to find out how many times the usb safety has 'acted'?
Per session or in total ?
If so, can this counter be showed on the display?
That might motivate more people to purchase the display option.

[mccarrot]

Andy_con - the main point of this device is to shut off the beam if your scanner power supply fails, as this can't be monitored by laser control software. If you never do audience scanning, you don't need one, otherwise they're a good idea. They have the secondary bonus of detecting any badly-programmed display figures where the dwell point, for example on corners, is too long, which are another way the audience can get over-exposed. In my view, such devices should be compulsory on any projector over 100mW.

Or if the galvo coil of your chinese galvo burns down! wich has happened before. (most of us dont have the money to use proper Cambridge scanners)

Or if the scanner amp breaks down (some of them got fuses to protect the scanners.

Or if you have a bad connection in you wiring or ILDA cable!!! (Dont you just love those crappy D-sub 25)

I have said before a scanfail device is mandantory for every high powered laser used for audicance scanning.

If you dont use audiance scanning you must use a cover in front of the aperture to prevent beam entering the audicance area in any case.
Only in this case you do not need a scanfail.

[andy_con]

RTFM

Basic operation
The safety supervises the motion of the laserbeam to detect conditions which might be harmfull to the human eye due to a too slow speed of the beam movement. This includes
● static beams
● beam movements below a certain speed.
If such a condition occurs, the safety blankes the laser out to avoid damage to the eyes of the beholders.
In order to allow the safety to detect such a harmfull situation, an area called 'Safety Zone' has to be defined within which slow or standing beams are considered to be dangerous and thus the laser need to be temporarily shut off
(blanked). If such a condition is detected, the circuit closes all 6 color channels,

Since μC based devices need to be expected to fail too, the μC of the safety is supervised by a watchdog which blanks the laser out within a time of 0.01 seconds, in case the watchdog detects a failure of the safety.
-

sorry am i not allowed to ask questions?

Andy_con - the main point of this device is to shut off the beam if your scanner power supply fails, as this can't be monitored by laser control software. If you never do audience scanning, you don't need one, otherwise they're a good idea. They have the secondary bonus of detecting any badly-programmed display figures where the dwell point, for example on corners, is too long, which are another way the audience can get over-exposed. In my view, such devices should be compulsory on any projector over 100mW.

Or if the galvo coil of your chinese galvo burns down! wich has happened before. (most of us dont have the money to use proper Cambridge scanners)

Or if the scanner amp breaks down (some of them got fuses to protect the scanners.

Or if you have a bad connection in you wiring or ILDA cable!!! (Dont you just love those crappy D-sub 25)

I have said before a scanfail device is mandantory for every high powered laser used for audicance scanning.

If you dont use audiance scanning you must use a cover in front of the aperture to prevent beam entering the audicance area in any case.
Only in this case you do not need a scanfail.

ok thanks thats all i wanted to know.

as pangilin has a similar feature within its software to block of certain areas i was a little unclear of the advantages of this software. but now i know.

if its not to much trouble mccarrot could you put me down for one, no LCD.

[mccarrot]

No problem andy_con, I will put you down for one

Did you read the manual?

//Repeat mode
http://www.laser-safety.de/User_manual_Safety_v2.pdf
//repeat mode off

[sbk]

That's not the good manual!!! That's what I originally asked if it was the Image or the Magic version.

The website isn't up to date. The good manual (USB Safety V4) is attached on the first message of this subject.

[mccarrot]

Correct, this manual is from the older RS232 version not the USB version, but the operation is somewhat similar.

As you could read a few post back I'm working on the english USB manual

[mccarrot]

I will copy the list here for easyer reading

Please check this list and the DISPLAY type, if you do not have the money ready or you have changed your mind send me a PM and I will remove you from the list.

Nickname pcs Display

MCCarrot 1 Graphic LCD
Greenalien 3 NO
-Bart- 1 LCD
hobbybob 1 NO
jmilan 1 NO
Edison 1 NO
KL79 1 NO
KL79 1 YES
Insanity 1 LCD
P1t8ull 1 NO
drlava 1 NO
aclasers 3 NO
DOC 1 LCD + 3x -2.7 lens
Andy_con 1 NO
SrS 1 NO
SbK 2 NO

Groupbuy will end Friday!, payment must be done ASAP after Friday, payment is possible until the next friday

Friday I will send everyone a PM with my bank details, or Paypal. But paying with paypall you have pay 4% extra.

[buffo]

thanks for organizing this. Now I'm on the lookout for a proper lens for divergence.

A negative 2.75 power lens works really well for projectors with typical divergence and power levels of 500 mw or less, assuming a standard viewing distance of 20 ft or greater.

I bought a *bunch* of these lenses for $2 each from AllElectronics.com and handed them all out at FLEM ver 5 back in March. They were cheap plastic, but they worked really well. I just noticed they've lowered the price to only a buck. Pick up a couple and give it a shot.

Every once in a while they have nice glass lenses for around $10 a piece, but I didn't see any negative lenses with enough power to be useful for diverging the beam of a projector. (You really want at least -2.5 power, and with more powerful projectors you might need up to -4 power.)

Adam