Profile: Micromat International provides printed circuit board drilling and routing machines. The MM300/500 & MM470/600 are manual tool change drilling and routing machines. Tool changes are performed quickly and easily, taking only a few seconds. Up to three boards of 1.6mm material may be stacked together for drilling and work is held in position by a standard 1/8 inch pin & slot tooling strip set into the bed of the machine. Kavo 4025 ball bearing spindles are fitted as standard and they can be freely interchanged with the Kavo 4026. The 450VA type 4032 is a heavy duty spindle for both drilling and routing applications. All axes are driven by brushless DC stepper motors which have a very high holding torque at standstill. This makes the machine suitable for small hole drilling since there is absolutely no table movement when the drill is passing through the work piece. The X and Y axes are capable of speeds in excess of 3 metres per minute giving a drilling rate of around 140 hits per minute in production. The air driven optical drilling machines have been designed to provide all the advantages of accurate optical drilling. The machine is electro-pneumatically controlled, with a large screen optics, high intensity illumination and clear definition to minimise operator fatigue. The projector unit consists of a long working distance lens, two special quartz and aluminium coated mirrors and a circular pattern target screen giving a balanced magnification of 7:1.