ICTS-Conveyor C Hardwire Design

Today I designed the control system by hardwire for controlling the conveyor C so that it would turn on and off automatically based on the sensors installed on conveyor B, and conveyor C themselves. I use two MY4N relays and 1 LY2. MY4N are meant for photosensors E3Z-D62 and LY2 is for AC on off of the inverter. Here is the sketched design.


Look at the crcuit diagram, I misstype the S3 and S4 sensors. They should be the other way around as the Ladder diagram.

As for the speed controlling concept, here is the data as obtained by Mr Norjo on 16/4/07.
Packaging Conveyor, CvA
Its usage is at 45 unit/minute
Therefore the average tact time for 20 data is 1.345s.
Thus for 25cm distance, the average speed is 0.186m/s
Hence the standard speed is 11.16m/minute

Feeder Conveyor, CvB
Average tact time, 1.74s
Thus for 30cm distance, the Average speed, 0.172m/s
Hence the standard speed is 10.32m/minute

Input Conveyor, CvC
Average tact time, 1.39s
Thus for 30cm distance, the Average speed, 0.216m/s
Hence the standard speed is 12.96m/minute

** From above data, thus it can be conclude that whatever the speed of the conveyor, the average speed of CvB > CvA at all times so that the process can be syncronised.

Since CvA tacttime is 60/45=1.333s or by hand 1.345s,
Thus for every 1.345s the distance travelled is 250.17mm

This position can be achieved by existed CvB by positioning S1 and S2 at a distance of 150mm. By doing so, then the travelled time from S2 to S1 is (150x60/10320)=0.872s. This is infact 0.473s faster than CvA. This about half second difference indeed is good enough for Cutter to transmit signal so that a mooncake can be released syncronously to the packaging conveyor CvA.