Dover Mini-MAG High Precision Linear Positioning Stages

Heason Technology has released a new high throughput version of the ultra-compact Mini-MAG linear motor driven positioning stage from its exclusive distribution partner Dover Inc. The new MMG-AL includes the primary design and dimensional characteristics of the well established range but replaces the stainless steel base and top plate with a simplified high grade aluminium construction and an optional single phase linear motor that combine for a minimised moving mass with higher bandwidth performance, and with the added benefit of reduced stage and drive amplifier costs.

Four standard travel options from 25 mm to 150 mm are available for the small footprint stage which has a nominal width of 80 mm and includes Dover's unique MAGT 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 positional 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 25 mm 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 8 kg with higher load capacity on request. The maximum velocity of 0.5 msec and acceleration to 2.2 m/sec2 ensures the stage can meet the dynamic performance required for the most demanding high precision production systems. The stage is aimed at the high throughput imaging industries but is 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 100 nanometres, 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 20 millseconds.

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

The Dover range includes linear and rotary stages in medium to ultra-high precision grades based upon both air and mechanical bearing technologies and with linear or rotary servomotor drive systems. 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 system solutions that help its customers to excel in their own technologies, with the advanced positioning performance they require.


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