9 Electronic Cam
In forward/reverse running pattern, master position 0 other than the start point should not exist.
9.6 Practical Application of an Electronic Cam
9.6.1 Application of a Winding Machine
In this application example users apply DVP-20PM for controlling the automatic high-speed winding
machine, which can be used on winding air-cored coils of different specifications such as drive coils,
speaker coils, antenna coils and other common coils. The winding system with DVP-20PM has better
reliability and is highly automated with high working speed and efficiency as well. Therefore, it can
achieve high quality results of batch production of coils. Here are some of the coils.
Normal winding machines apply small PLCs with built-in pulse function. Though high speed input points,
the PLC receives pulses from the encoder of winding shaft, and roughly synchronizes the speed
between the winding shaft and the coil shaft. Due to the possible delay of CPU operation, this kind of
winding process has lower accuracy on speed synchronization. Therefore, the coil winding quality could
be significantly lowered because the uneven winding results. For example, generally PLC executes the
reverse winding operation through interruption when the set up position from the winding shaft is
reached. In this case, error will occur due to the delay of CPU operation. In low speed situation, the
basic demanded quality could be fulfilled. However, in high speed and multi-layered winding situation,
the surface of coil will become uneven and the winding quality will drop down.
DVP-20PM is designed specifically for motion control applications. DVP-20PM applies duo CPU
structure with one CPU exclusively processing motion control algorithm. Therefore, motion control
operations such as trajectory drawing, linear/arc interpolation can be well performed with common
logical control. In this high speed winding application users apply the electronic cam function to solve
the switching delay problem of reverse winding situation explained above.
DVP-20PM Application Manual
9-51
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