Four factors:

1.The size of the light spot. If the spot is very small,the cutting accuracy is very high. If the gap after cutting is very small shows that the precision of laser cutting machine is very high,the quality is very high. But the laser beam emitted by the cone, so the gap cut out is also cone. Under such conditions, the greater the thickness of the work piece, the lower the accuracy will be, also the larger the gap.

2.Accuracy of worktable. If the precision of the table is very high,the accuracy of the cutting is high. The precision of the table is also a very important factor in measuring the accuracy of the laser machine.

3.Laser beam condensed into a cone.When cutting a item,the laser beam is tapered down. If the thickness of the work piece is very small, the accuracy will be reduced. Then the gap will be very large.

4.Material will also affect the accuracy of laser cutting under same situation. The precision will be very different when cut stainless steel and cut aluminum. Stainless steel cutting accuracy will be higher,and the surface will be more smooth.