METHOD OF RETURNING TO ORIGIN.

摘要

The linear scale (1) is provided with a second scale portion (2) for specifying a deceleration starting position and an original position in addition to first scale portions (3,4) that generate two-phase signals for detecting the position. Signals (S1,S2) that represent a deceleration starting position (D) and an original position (O) are generated from the second scale portion (2). The quick-feed speed (Va) for return to origin is decelerated to a speed (Vb) for return to origin using the deceleration start signal (S1). Movement is stopped in response to the original position signal (S2) to return to the original.