Method for splicing a linear stepper motor platen

Details Method for splicing a linear stepper motor platen Method for splicing a linear stepper motor platen

1997-09-08

1999-03-30

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

29607, 29609, 310 12, H02K 1504

Patent

active

058873341

ABSTRACT:
A method of splicing the platen component of a linear stepper motor to extent its range of travel for various applications is disclosed. In a linear stepper motor the so-called forcer or armature component moves linearly along the platen or stator in the manner of a track assuming discrete locations in response to the state of the electrical current in the field windings of the forcer. Conventional machining equipment limits the maximum length of the platen that can be produced for such a motor. Because various industrial applications demand an extended length of the platen component, the splicing method enables two or more platen components to be arranged in an end-to-end relation while maintaining positional accuracy, preventing air loss from the air bearings typically utilized with such a motor, and maintaining the magnetic flux path necessary for proper operation of the forcer component of the motor. The splicing method utilizes conventional machining operations to provide an angular cut on the respective end portions of the two platens to be joined. Thereafter, a plurality of parallel teeth formed in the platen are axially aligned by the use of optical devices to ensure the continuity of the magnetic flux path which extends through the teeth of the platen during the operation of the motor.

REFERENCES:
patent: 4310966 (1982-01-01), Breitenbach
patent: 4897916 (1990-02-01), Blackburn

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