Nordson 765105, Manual, Page: 36 / 58

Operation
4-6
E
2001 Nordson Corporation
All rights reserved
Gun Controller
Issued 03/01
P/N 768603B
You need to know:
1. The speed of the conveyor in mtrs per minute
2. The configured clock rate in pulses per second, entered when
configuring the controller
Determine:
C2 = Configured clock rate x 60
Conveyor speed
For example the conveyor runs at 5 mtrs per minute and the internal
clock is set to 10 then
C2 = 10 x 60
5
C2 = 120 pulses per metre
Measure the distance to the output station
L1 = Distance of spray station sensor
Convert this to counts
Output 1 delay to on counts = L1 x C2
If this number were to be put in as Output 1 delay to on counts with the
Output 1 extend counts left to 0 then the unit would turn the output on for
as many counts as were received while the part was in front of the
detector.
This is not normally the case and it is required to turn the output on
shortly before the part arrives (e.g. to allow for electrostatic wrap or for
powder to reach the part).
If this was done just by modifying the Output 1 delay to on counts so the
output comes on before the part reaches the output station, then
because the unit only turns on the output for the number of counts that
the part is in front of the detector the output would be turned off before all
the part had passed the output station. To overcome this a part extend is
used and is calculated as follows:
3. Calculating Numbers
(contd.)
Internal Clock