Resolver interface for servo position control

Details Resolver interface for servo position control Resolver interface for servo position control

G - Physics

05

B

341/100, 318/15

G05B 19/19 (2006.01) G05B 19/35 (2006.01) G05D 3/12 (2006.01)

Patent

CA 1151268

ABSTRACT OF THE DISCLOSURE In a control apparatus for a machine tool, a resolver interface circuit is utilized to determine whether or not the axis motors have driven the machine tool to the selected position. The resolver interface circuit synthesizes sine and cosine wave forms which are applied to a resolver which is mechanically coupled to the corresponding axis motor. The resolver interface circuit also synthesizes a signal which is phase related to the resolver excitation wave forms by the selected rotational displacement of the resolver and axis motor shafts required to achieve the selected position for the machine tool. The phase related signal and a positional feedback signal from the resolver are compared to generate an error signal to the driver for the axis motor. The selected position can be each incremental step where the axis motor is a stepping motor.

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