@Mirco_Slepko something is wrong. I get a single beam at each mirror. Also, be sure to perform the check at the limits of travel for the mirrors. For example, when ensuring that the beam is centered in the focal lens I test test the head at each of the 4 corners. There are many videos on mirror alignment and it may be helpful to watch a few. You’ll start with the first mirror in the series and work your way down to the last right before the lens. Sounds like you’re being maybe hitting the edge of a mirror or the lens housing.
confirm that the optimal situation is when the beam hits a single point?
If so I will have to lose a few hours to re-check all.
thanks guys are giving me a really big help!!!
@Mirco_Slepko Yeah, optimal is when you get the beam to hit the exact same point on the 3rd (travelling) mirror at all 4 corners of the machine (top left, top right, bottom left, bottom right). It will take a while to sort this stuff out when you first are learning, but eventually you will be able to do the alignment process in about 10 minutes once you know what you’re doing.
I believe the issue is table height. Like Yuusuf have mentioned. It is the distance between the last lens and the material being cut. I had my K40 since 2013. My power never go above 10ma.