Polarizing plate pasting machine in the process of supplying LCD Polarizing plate, we would like to detect the last one plate to supply the following polarizing plates without stopping machine.
Robot arm is working for supplying polarizing plates, so the space around plates can’t be used for setting sensors. Since it’s minor change of existing machine, we don’t want major change of design.
Solution Fiber Sensor
We punch a hole in the base. We set sensors to be OFF when there are more than two plates by setting threshold. On the other hand, when there is last one plate, it’s ON and outputs. Therefore, we can know time for supply.