Gento's scanner safety board

[mixedgas]

I think you might find the following interesting as a aid to tracing the cloned cambridge amplifiers.

Thats a 6850 series amp, spread out and redone as two amps on a board. At least the ones in TARM.jpg

http://www.skywise711.com/lasers/scanner/scanner.html

Skywise hosts that for me.

Steve

[iggythebrush]

Thanks Mixedgas, position outputs traced and connected - scanner safety working. In fact, the Fiberray amps have a connection prepared for the position outputs, but they are not connected.

[greenalien]

The chance of getting (and posting!) the circuit diagram of a commercial scanner amp is not too great, I assume...

With Mixedgas on board, it's surprising what's possible - Nice one, Steve!!

[dave]

While we're on the subject, this might be a good opportunity to list scan amps that do have a dedicated feedback signal. Here's the ones listed in the scansafe manual:

All the scanners we sell have a position output, or in the case of the scanlsp's I can tell you where to tap it off fro..

[iggythebrush]

Another stupid question:

I am running a QM2000 board with a NEOS PCAOM driver (bipolar inputs). The scanner safety board only has unipolar modulation inputs and outputs. When everything is connected in a bipolar fashion, with the colour minus connections straight through to the PCAOM driver, and the plus going via the scanner safety, the PCAOM works perfectly and I can also see that the scanner safety board is working (LED changes colour), but the laser is not completely shut off when the LED goes red (although it does substantially decrease in intensity).

When connected in a unipolar fashion (colour minus not used, ground reference for colour minus inputs on PCAOM driver) the PCAOM does not appear to work properly (very noisy, lower intensity), although the laser does shut off properly when LED goes red.

Any way round this issue? Am I being stupid here?

Merry Christmas and happy holidays to everyone!

[cyberb0b]

For easy use,

Here are the test frames in an .LDS

[kl79]

thank's !
I haven't power up my board for now...I must do it !

[Gento]

Verbesserte Software.

Gento

Link: http://www.Laser-safety.de/USB_Safety_English.rar

[mccarrot]

Thanks Gento,

I have been playing with the scanfail but even at 1% move and 20mSec its does blank too much.

I have only adjusted it with the USB adjustment tool, I have not used the 3th test frame for finetuning yet.
What is the best way to make the scanfail less sensitve?

[mccarrot]

Thanks Gento,

I have been playing with the scanfail but even at 1% move and 20mSec its does blank too much.

I have only adjusted it with the USB adjustment tool, I have not used the 3th test frame for finetuning yet.
What is the best way to make the scan fail less sensitive?