Aerotech BLM Series Linear Motors

Design Features

• High output force in an 86.4 mm x 34.3 mm cross section

• Continuous force to 397.6 N (89.4 lb); peak force to 1590.4 N

(357.5 lb)

• High-energy rare-earth magnets used in magnet tracks for

high acceleration capability

• Non-magnetic forcer coil provides high force with zero cogging

for super-smooth velocity and position control

• Follows the 2011/65/EU RoHS 2 Directive

Aerotech’s “U-channel” BLM series linear motors are 86.4

mm x 34.3 mm in cross section and have proven ideal for

both high-accuracy and high-throughput applications.

BLM series motors are direct drive and consist of a

noncontacting forcer coil and “U-channel” rare-earth

magnet track. This design eliminates backlash, windup,

wear and maintenance issues associated with ball screws,

belts, and rack and pinions.

The noncontact design of the forcer and magnet track results

in a maintenance-free system.

The compact moving forcer coil assembly contains Hall

effect devices, and a thermal sensor, and is constructed of

reinforced ceramic epoxy. This ironless design eliminates

eddy-current losses that otherwise would limit speed and

produce additional heat. For highest rms force, optional

air cooling is available. Offering high peak forces in its

standard configuration, BLM motors are available with

special high-power magnets that can increase output force.

The BLM series nonmagnetic forcer eliminates cogging and

magnetic attraction to allow for extremely smooth motion

and very tight velocity and position control. These linear

motors are ideal for any application that requires high levels

of positioning resolution and accuracy. BLM series linear

motors are forgiving to align, easy to assemble, and keep the

magnetic field well-contained. Magnet tracks are stackable

for any travel length. They are also suited for cleanroom use

as they produce no particulates.

The BLM can be driven using standard Aerotech

brushless amplifiers and controllers to provide a

complete integrated system.