Servo controlled pan tilt laser pointer issue

[jasper79]

Hi,

I built a laser pointer for clay shooting dry practicing.
I want it to draw straight line on the wall with a laser pointer (like the cat toys you see on YouTube) to follow with the laser pointer in the gun.

This works though there's one physics problem, the laser is pointing at an tilted angle so when starting the sweep it doesn't draw a horizontal line but instead it makes a Amazon logo.

I understand that this is because of the laser being rotated by the pan servo though I'd like to know if I can compensate this by using the tilt servo.

So when panning it should slightly tilt to bend the curve if that makes sense to you experts?

Setup is 2 servos mounted to each other for pan and tilt controlled by a Uno.

Best regards,

Added details, the servo is moving slowly so I'm able to follow the dot on the wall. About 2 seconds for 5 meters distance.

[Paul_B]

@jasper79

I understand that this is because of the laser being rotated by the pan servo

It means the pan servo is not mounted level with the shaft absolutely vertical.

[jasper79]

Ty, well actually I solved it by setting the base parallel to the wall.

[Paul_B]

I think you mean perpendicular to the wall.

[dave-in-nj]

Are you guys getting off on a tangent?

[Paul_B]

Could be.

[jasper79]

Parallel
(of lines, planes, or surfaces) side by side and having the same distance continuously between them.

"parallel lines never meet"

Perpendicular
at an angle of 90° to a given line, plane, or surface or to the ground.
"dormers and gables that extend perpendicular to the main roofline"

What I mean is that the front of the base wasn't parallel with the wall I'm projecting on.