I-top dac and software Help?

[andy_con]

Thats it 1,2 and 25 for the galvos and 5/6/7 and 25 for your RGB lasers.

Jim

i dont need 25 for the RGB, 18 19 20 are -

[JimBo]

Correct.
Have you got all the lasers yet?

Jim

[andy_con]

only green sadly, waiting for red to be returned to me

[DZ]

i dont need 25 for the RGB, 18 19 20 are -

Actually, that may not be correct. You wouldn't use pin 18, 19 and 20 unless you have a laser that is capable of handeling differential inputs. And I am not sure that I've seen one yet that does. You would need 5, 6 and 7 for your RGB and 25 has DC Common for the three. Not sure what system you are using, but with pangolin you tie pin 18, 19 and 20 to pin 25 when differential signals are not used. That way you get the full 5V swing on pins 5, 6 and 7.

So with a typical RGB projector without differential inputs on the scanners as well, you only need 6 conductors
1-X
2-Y
3-R
4-G
5-B
6-DC Common

[andy_con]

its cool ive got it working, i used the + RGB and the - RGB

[JimBo]

I use +RGB and -RGB too.

Jim

[andy_con]

the software that came with it is really gud but well hard to use

[DZ]

Guys, there is a right way (standard) and a wrong way of doing things. Sure, you may be able to get everything to work on your system, however if someone else wanted to attach thier dac to your (non-ilda standard) projector or cabling, then there will be issues. We ran into some of this at FLEM. So, here you are with differential signals driving your solid state lasers, when true differential signals require 3 lines. Lets take red for example, it would require pin 5, 18 and 25 to truely run differential signals, all you seem to have is a mess that in no way references ground. Here is some further reading:

http://www.pangolin.com/LD2000/qm2000pinouts.htm
http://www.laserist.org/StandardsDoc...finaldraft.pdf

David

[andy_con]

my module says + and - not + and ground

[DZ]

By module, I asume you are talking about your dpss driver. Thats great, but if there is only 2 inputs for the blanking circuit then the - = ground. Only if you driver has 3 input lines could it then support a differential signal +, Common (ground) and -.

David