| 摘要 |
Spindle carrier is indexed from work station to work station and carries a plurality of spindle assemblies with work carrying collets from station to station. Each spindle assembly is adjustably mounted with respect to the spindle carrier and each collet is spring-loaded against a face to maintain the collet at a reference position and each collet is spring-loaded toward the closed position so that it is normally closed without application of an operating force. During indexing which causes engagement of a spindle with the spindle drive belt, the peripheral speed of the spindle drive pulley is substantially matched with the peripheral speed of the belt to provide smooth acceleration.
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