Image upside down

[leif26]

Hi, I'm projecting from a Chinese amp and galvo setup I bought off ebay. It projects but the ILDA test image is upside down. The laser begins at X mirror.
Maintaining existing polarity, I swapped the X and Y wires between DAC and amp but that just turned the image 90 degrees and mirrored the image. I tried swapping X & Y between amp and galvos but that gave the same result as before. The manual of the amp says nothing about reversing an image. The PCB has no jumpers that are jumped but it has several pairs of pins, one labeled feedback and the other labeled G +15.
I assume I can turn the image upside down in LSX? I read something about making Y -1 but where do I input this value?

Thanks!

[epyn]

Have your scanner differential input? In that case you can swap the signal wires from ilda connector.
Y galvo cable plus(+) and minus(-) by hand. Pull the wires from the cable's PCB connector and put them back in reverese

Easier from the software in the settings menu.
Happy New Year!
Ferenc

[Laserchuck]

I can't speak to the software side, but it's helpful to have a gain/offset stage at the projector. Obviously these days most people only have one type of signal source, (computer) so it is often handled at that source (software), but every projector I've used professionally has had a little OpAmp board that allowed me to trim the signal as needed and flip a switch for inverting the image. Very helpful if you have to do rear projection or want to split the same signal to two projectors for mirrored beam effects crossing in a room.

[leif26]

Yes, reversing +\- polarity between ILDA-SCSI and amp did it!
Thanks !