| 摘要 |
An apparatus for patterning a cylindrical surface comprises a punch held by a holder connected to an arm which is pivotally mounted to permit the punch to strike the cylindrical surface. The cylindrical surface is mounted on a spool which can be rotated relative to the punch. A platform supporting the pivot point for the arm engages a worm gear which can be rotated to translate the platform along the length of the worm gear. The apparatus further comprises at least one source of pressurized fluid, a plurality of pairs of pressure chambers, a piston slidable between each pair of pressure chambers, a dual action on/off valve connecting the pressure source with one of the pressure chambers of each pair, a plurality of restriction valves for regulating the flow of pressurized fluid to each of the pressure chambers, and a programmable controller having a plurality of input and output leads, a plurality of timers, a plurality of counters, at least one high speed counter, and at least one reverse counter.
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