Machines
The laser arm is held by the support column (Z-axis). You can adjust the laser focus by moving the Z axis with the height adjustment knob.
Laser cutting machines are able to cut metal with great precision. This is the main reason they are so popular. Plasma cutters can be cut with 2X greater accuracy than laser cutting machines. Plasma lasers can be used to cut metals with a precision of 0.1mm, or.004 inches. Laser cutters can cut metals at a precision of.05mm to.002 inches.