Aerotech BLMF Series, Руководство пользователя

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Assembly and Installation BLMF Hardware Manual
2.1. Bearing System
The flat linear motor arrangement and load must be supported by a linear bearing system. The bearing
system must be capable of supporting the forcer, the load, and, in the case of using BLMFS and BLMFS5
forcers, a considerable magnetic attractive force between the forcer and the magnet track.
2.2. Straightness and Flatness Requirements
Straightness and flatness tolerances are deviations from a straight line in two dimensions. There are two
separate alignment tolerances: straightness (side-to-side), and flatness (air gap) of the motor that need to be
maintained over the length of travel. Mounting surface flatness has to be held to specific tolerances to
maintain desirable motor performance.
Straightness
The forcer may deviate left or right ±0.030 in (±0.76 mm) from the magnet track center line during motion
(refer to
Figure 2-1 ). Generally, the BLMF motor operates regardless of straightness provided the forcer does
not contact the magnet track during motion.
Flatness
The nominal air gap between the forcer and magnet track surfaces is 0.030 in (0.76 mm). The air gap has a
tolerance specification of +0.010 in / -0.000 in (+0.25 mm / -0.00 mm). Larger gaps result in a decrease of
output force from the motor. Smaller gaps result in a significantly increased magnetic attractive force of the
forcer to the track.
Figure 2-1: BLMF Straightness and Flatness Tolerances
2.3. Mechanical Arrangement of the Magnet Track
The track can be mounted in a horizontal or vertical orientation. In addition, the track can be the stationary or
moving part of the machine. With the forcer stationary and the magnet track moving, the load generally
increases but the cable management system is simplified. A stationary forcer usually allows for increased
heat transfer from the forcer.
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