MMG-AL Mini-MAG positioning stage for higher throughput

Four standard travel options from 25mm to 150mm are available for the small-footprint stage, which has a nominal width of 80mm and includes Dover's MAG moving-magnet motor technology that eliminates the need for moving motor cables. The durable side-mounted tape-style optical encoder is available in a choice of resolution from 0.1 to 0.005 microns. With specified bidirectional repeatability to within +/-0.5 microns, and with stage flatness and straightness across the MMG-AL range between 4 and 8 microns, the positional accuracy is for the 25mm travel version is 3 microns with a 0.1 micron encoder.

The MMG-AL has less than two-thirds of the total mass of its stainless steel counterpart and a nominal load capacity of 8kg with higher load capacities available on request. The maximum velocity of 0.5m/s and acceleration to 2.2m/s2 ensures the stage can meet the dynamic performance required for demanding high-precision production systems. The stage is aimed at high-throughput imaging applications but is said to be suitable for any precision positioning application where step-and-settle times and in-position stability are principal requirements. With a typical sustained throughput rate of up to 2000 moves per minute and position stability below 100nm, the low-mass design also suits vertical applications for Z-plane focussing without the need for a counterbalance system, where a 5 micron move can be completed in under 20ms.

Heason says the non-contact linear motor and encoder system requires little maintenance and the MMG-AL's anti-creep bearing system provides an exceptionally long working life with minimal maintenance.

The Dover range includes linear and rotary stages in medium to ultra-high-precision grades based on both air and mechanical bearing technologies and with linear or rotary servomotors. Heason Technology works closely with its global distribution partners to provide a comprehensive range of first-class motion control components in combination with its own in-house design and assembly service for superior motion systems.