Originally Posted by
Dave Sheldrake
Hi Josh,
The first mirror height may be out (up/down) but unlikely, more likely is the tube is not firing the beam at mirror 1 at an exact plane (45/90 degrees) that would mean no matter what you do you will always be trying to align a beam that starts off at the wrong angle leading to a move in spot position. Until the tube is bang on to the first mirror you will be chasing your tail
The angle of the tube does not matter at all. As long as the beam is aimed at the center of the first mirror the tube can be at any angle. The first mirror steers the beam toward the second mirror. Since the first mirror is fixed all that matters is that the beam is reflected from the center of that first mirror and steered accurately towards the second.
Reci specifically recommends that one end of the tube be slightly higher than the other, something to do with air bubbles in the cooling system.
Shenhui 1440x850, 130 Watt Reci Z6
Gerber Sabre 408