Festo Checkbox Compact CHB-C-X, Manual

Page: 28 / 148

1. System summary
1−10
Festo P.BE−CB−COMP−en en 0503c
Dimensioning the buffer zone
A Section between the transporting device and the sensor.
Section A must accept all conveyed parts which lie be
tween the Checkbox and the sensor when a conveyed part
has been registered by the sensor. The length depends
on:
the geometry of the conveyed parts
the maximum feeder rate of the small parts conveyor
the length of the transporting device.
B Section between the sensor and the next machine
When the small parts conveyor is switched on again,
uninterrrupted operation of the assembly system must
beguaranteed until the first new conveyed parts arrive.
Section B must be dimensioned so that a sufficient
number of conveyed parts can be made available.
The length depends on:
the geometry of the conveyed parts
the maximum time delay between switching on the
small parts conveyor again and making the new
conveyed parts available
the length and speed of the transporting device
the average feed amount of good parts in the nominal
orientation.
AB
*)
Section between sensors 1 and 2 (Fig.1/3).
Section AB determines the switching delay (hysteresis) of
the small parts conveyor for regulating the supply of
parts. The longer the section is, the less the switching
frequency.
*)
Only type CHB−C−P/..X:
Set the number of buffer zone sensors = 2" with CheckKon
Tab.1/4: Buffer zone sections
When connecting the buffer zone sensors note also
chapter3.3 and for type CHB−C−P/..X chapter 4.3.6.