A combination X-Y positioning mechanism includes a first guide means linearly reciprocable relative to a frame and a second guide means linearly reciprocable relative to the first guide means with the directions of relative reciprocation being substantially mutually perpendicular. A first carriage means is slidable along the respective first guide means and a second carriage means is fixed to the second guide means responsively to the actuation of a closed loop driven by a pair of stationarily fixed bidirectional drive motors and engageable with a series of strategically placed pulleys. A carrier is slidably supported on the second guide means.
This is a division of application Ser. No. 885,173, filed July 14, 1985, now U.S. Pat. No. 4,697,348, which is a continuation of Ser. No. 647,746, filed Nov. 6, 1984, now U.S. Pat. No. 4,600,083.
