| 摘要 |
The endless belt driver eliminates the feeding distance difference generated between two rollers in any mode of running, starting, and stopping, to make various coloured printing patterns in precision. The endless belt driver comprises AC motors (4,5), positioned at the two rollers (1,2) supporting the endless belt (3), used for reducing the belt feeding speed; pulse generators (18,19) for detecting the feeding distance of the endless belt; a switch (8) for setting a repeat length of the belt; pulse converters (6,7) for converting the repeat length into pulses; sync. controllers (11,15) computing the difference between the belt feeding distance and a reference value; D/A converters (12,16).
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