Who is using ILDA pin 12 return and/or ILDA pin 13 shutter?

[weartronics]

Hi PL,

I'm wondering, who is using the ILDA pin 12 return and/or the ILDA pin 13 shutter signals? Can you tell me more about your application?

Of course, it is important to have a shutter in your projector with series interlocks including the ILDA pin 4-17 loop to prevent light output when a DAC is not connected. But I haven't discovered anybody using the pin 12 return and/or the pin 13 shutter yet. If you use it, I'm interested to learn about your application.

Best regards,

weartronics

[mixedgas]

I put 5V on it to drive a fet that opens the shutters.
its supposed to be limited to a few hundred mA, tops.

Steve

[300EVIL]

Sure, I use pin 13 for my shutter. I just use a TIP120 to drive the shutter solenoid with 12V. I added a resistor and a diode to the circuit to keep from overdriving the coil and killing the rebound feedback.

[weartronics]

How does the software drive pin 13? Is it always driven high when the software is running? Or do you have to toggle it in some dialog box? I note that e.g. EasyLase doesn't seem to have an API function to control pin 13, but maybe Pangolin implements it.

[300EVIL]

On the Pangolin QM-2000 pin 13 only goes high when there is laser output. On some shows, the shutter can actuate many times due to the fact there are points of no laser emission.

[weartronics]

On the Pangolin QM-2000 pin 13 only goes high when there is laser output. On some shows, the shutter can actuate many times due to the fact there are points of no laser emission.

Isn't that a problem if the shutter moves every time there are blanking points?

[300EVIL]

Isn't that a problem if the shutter moves every time there are blanking points?

I was going to mention this in my last post but left it out. Actually, my shutter is quite slow, no where near the speed of a GM20. Yet, I have no lost image that I can perceive. There may be a delay between shutter actuation and laser output but I have not detected it with my eye. Bill Benner may have to comment to confirm this.

[300EVIL]

Oh, sorry, I may have made this confusing. Yes, blanking points are handled by the laser(s). However, When there is no emmission for a period of time, whatever that number is, the shutter closes. Hope that explanation is a little better.

[weartronics]

OK, I understand, thanks!

[riyalasers]

Pin 12: In RIYA PCI\USB\Ethernet controllers we use this pin as "Safety input" :
- if user connected this pin to GROUND ("emergency button") - controller make shut down all color channels, intensity and shutter, and move beam to center of coordinates.


Pin 13: some manufacturers (Neo-Neon for example) use mechanic shutter in their projectors; without high-level signal on this pin beam will closed.

In RIYA PCI\USB\Ethernet controllers we have command for control level on this pin;
in Multibus controllers we make high-level within translation show and low level when translation is finished.