Hi thanks for the reply. I've tried changing the step length and it didn't work. Ive just realized when the laser head stops halfway on the x axis the software states that its current position is 699.998mm. The length of my table is 700 so its stating that it has reached the end of the table but really its only halfway. the seller isn't helping at all, claiming it was in perfect working order, when he sold it, which is rubbish, 3 weeks in and its still not working :-(