 |
| Components |
| Computing
Element |
| |
A single or dual CPU server
with clock speed in excess of
3 GHz and a minimum of 1 GB RAM
more than meets the processing
requirements of the application.
The cache, graphic cards, CD drive,
serial port, display and other
standard peripherals compare with
the best in the industry. |
| The
Camera |
| |
The Digital VDO camera is a
C-mounted color camera using IEEE
1394 digital interface. The transfer
speed is 800 Mbps and supports
higher frames. The camera has
an external trigger, which is
synchronized by using a logical
relation between the encoder pulse
train and proxy sensor. This allows
synchronizing the trigger with
the color mark on the paper. The
exposure time is set in a way
to freeze the captured image while
it is moving at the highest printing
speed. The camera image is processed
by compressing the image in order
to reduce the processing time
to a minimum. The selection of
lens has been carefully made to
ensure the right vision. The camera
is housed in an enclosure with
toughened glass opening for the
lens. It is fan cooled and has
halogen lamps for good illumination. |
| PLC
(Programmable Logic Controllers) |
| |
A single web with both sides
color has 8 motors, 4 in lateral
direction and four in circumferential
direction. Each of these motors
can move clockwise or anticlockwise
depending on the direction in
which the motor movement is intended;
left or right for lateral direction
and forward and backward for circumferential
direction. Each of these motor
has a limit switch to ensure the
motor doesn't exceed the allowable
limits. These inputs could either
be analog or digital totaling
upto 16. The other ports are high
speed I/O ports to read and write
fast changing signals. The PLCs
offer you a choice of RS 232 or
Ethernet connectivity to the controlling
computer. It has on-line monitoring,
control to enable live diagnostics. |
| Encoder
/ Proxy |
| |
InskStat uses a high PPR (Pulse
Per Revolution) encoder which
give accuracy greater than 0.5
mm over the length of the news
paper. The proxy sensor registers
a pulse with every revolution
of the folder. The two signals
together decide accurate camera
triggering. |
| Software |
| |
The entire application is written
using RAD tools like VB, C and
C++. The operating system is Windows
and the RDBMS is Oracle. The algorithm
is validated against several use
cases devised in coordination
with clients and industry leaders. |
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