Method and apparatus for verifying the position of a motor...

Details Method and apparatus for verifying the position of a motor... Method and apparatus for verifying the position of a motor...

G - Physics

05

D

G05D 3/20 (2006.01) B29C 45/76 (2006.01) G05B 19/4062 (2006.01) H02K 11/00 (2006.01)

Patent

CA 2249031

A method and apparatus for verification of the linear position of a machine element driven by a motor is provided. The actual position of the element is detected and compared to an expected position. When the two positions differ from each other by more than a predetermined tolerance value for a predetermined amount of time, an error signal is generated which deactivates the motor and generates an alarm for the machine operator. Preferably, the linear position of the axis is detected by a transducer and the expected position is determined by detecting the rotary position of the motor through the use of a resolver, which is then converted to a linear equivalent through the use of the gearing ratio. The method and apparatus can detect faulty machine conditions and thereby prevent machine malfunction and/or machine damage. Preferably, the method and apparatus are used to verify the position of machine elements in an injection molding machine.

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