| 摘要 |
A drive system for a machine such as a robot providing motion in two independent directions under the control of respective motors, comprising a saddle (2) supported for motion in a first said direction, an arm (1) supported by said saddle for motion in the second said direction, a first belt drive arranged to transmit drive from a first of said motors (16) to said saddle and a second belt drive arranged to transmit drive from the second of said motors (21) to said arm, said second belt drive comprising a belt (9) having two portions extending around respective pulleys (19, 20) mounted on the arm and arranged to be driven by the second motor such that one portion is lengthened and the other shortened when the first motor (16) is stopped, so that the arm moves relative to the saddle, but when the first motor (16) is driven and the second motor (21) stopped said two portions remain the same length so that the arm does not move relative to the saddle as the saddle moves. |
