FI002K0018v1530hUK – THS/21 Instruction manual for installation, use and maintenance
3
INSTALLAZIONE
ORIGINAL
INSTRUCTION 123
3.9.6 Encoder
Variable speed conveyor belts must be fitted with an encoder. In this case the delay in activating the
ejection step is calculated dynamically as a function of the speed measured. It is also possible to
control the speed of the conveyor belt continuously so that it is always between BL and BM.
Programming menu
Remote
parameter
Description
Setting
Configuration(adv)
> K encoder
KE
Pulses per encoder revolution
(PPR)
1 - 1000
pulses/rotation
Configuration(adv)
> Diameter
DI
Diameter
10 - 250 mm
The diameter DI (mm) refers to the diameter of the encoder wheel or to the diameter of the drive
roller to which it is fixed, increased by twice the thickness of the belt.
Given the maximum speed of the line (v
max
in m/min), the encoder must be set for a number of pulses
per rotation (PPR) as defined by this formula:
max
max
180
v
DI
PPR
Start the transport, enter the
I/O Status > Measures
menu and verify, using a tachymeter, that the
speed measured (
Speed
) corresponds to the current one.
Use an Encoder with the maximum available value of PPR, however lower than PPR
max
value.
If an Encoder is not used, leave KE=0.
3.9.7 Synchronization
photocell
The Synchronization photocell must be programmed as described below:
Programming menu
Remote
parameter
Description
Setting
Configuration(adv)
> Position pcell
PH
Position of the photocell relative
to the Probe
IN / OUT
Configuration(adv)
> Dist. Pcell-MD
PD
Distance between the Metal
Detector and the photocell
0 - 2000 mm
In the ejection mode
FS
(see its description on paragraph
Configuration > Ejection mode
), the parameter
PH
is not
available and the synchronization photocell shall be installed only at the exit from the Probe.
F
S
N
PD
F
S
N
PD
Photocell installed at the entrance
Photocell installed at the exit from the Probe
N
: conveyor belt;
S
: electronics unit;
F
: photocell;
PD
: distance photocell- electronics unit
