@nottingham82 thanks for your help i am going to purchase T2laser software as soon as i get the unit built, i have almost finished it but it is missing bits I tell you I am NOT HAPPY. its 3:15am here and I cant complete it due to missing bits
@mutton44 Most embarrassingly, I confess to having this problem, after playing with the X-axis tension for three days, turning off bi-directional cutting, I bumped the laser mount with my wrist while aligning a small board and it wiggled; the thumb screws holding the laser module onto the carriage mount had worked loose, and the module would lean slightly on right to left movement. I tightened them, reset the tension on the belt, and now works great.
@vilhjsig If you have T2Laser you can change parameters easily, to reverse the axis you just click the option in the settings menu. T2Laser will run the CNC nicely, it's what I use. It also supports 3D images.
My new blue heat sink 2500mW laser dot looks the same - intense central dot in the middle of a less intense line. But works fine - it only cuts/burns on the fine dot. I can't comment if significant energy is wasted on the line portion - if it was, I would return it.