Skewed output?

[dirtworm]

Hello all. I'm putting together a projector and my output is skewed. Take a look at the pictures and let me know what you think. Is it my galvos? Graphics and abstracts look good, they're just skewed. Squares are not squares (although they are crisp).

What do you think?

30k scanners
Laserwave 250mw/532
Quickshow

Thanks!
-Glen

[DjHeadie]

looks to me like those scanners are in need of a tune but i dont want to say that as any instance of that ive encountered is usually much more of a mess and less crisp. truly something funny going on here, i for one hope you resolve this.

[Solonar]

Check to see if your galvo input cables are set-up for differential, not single ended.

[KGB]

Settings>Projection Zones>Geometric Correction ?

[dirtworm]

Ok. I discovered the problem. I did not have pin25 of the ilda cable connected to the common on the scanners power supply. Connecting this fixed the problem!

Differential versus single input?
My galvos have a 3 pin input: +,-,0v
From the fb3 which 2 should I hook to. When I connect to the +,- I get a much larger output than when I connect to the +,0v. Which is correct??

Thanks for the suggestions!

-Glen

[Solonar]

+ and - are giving you the full scan range.

+,0 or -,0 are only giving you half your scan range.

[dirtworm]

+ and - are giving you the full scan range.

+,0 or -,0 are only giving you half your scan range.

Thanks. I'm using the +,- and it's working well!
-Glen