CDA PC44 Instruções de Operação descarregar pdf (Página 95)

5.

Gun(s) Firing Between

Patterns

(continued)

Problem

Possible Reason

Guns

firing

between

(Retroreflective sensor only)

patterns,

opposed

sensor reacting to reflections from

and

retroreflective

substrate.

sensors

(continued).

Inductive interference (noise)

from power or solenoid

cables.

6.

Other Gun Firing Problems

Problem

Gun(s)

firing

coincidently

w

it

h

other

machine

operation

.

Gun(s)

firing

for

every

other

product,

or

intermittently

skips

products.

C Nordson

Corpora~on

1993

AI Roghts Rese<ved

Possible Reason

Sensor mode set incorrectly.

Sensors wired incorrectly.

Inductive interference (noise)

from machine control or other

relay.

Noise from mach

in

e operation

occurs

at

the end

of

the substrate

and causes a false trigger.

Limit switch bounce

at

end

of

the

substrate causes a false trigger.

Product spaced too closely

(pattern overlap is not

allowed

by

PC40).

Troubleshooting 5-5

Corrective Action

Observe sensor LED to see

if

sensor reacting to reflections; if

so, adjust gain setting;

if sensor

still reacts to reflections, mount

emitter and reflector

to

an angle

to line travel or use Nordson

polarized retroreflective sensor.

Route sensor cables away from

power and output wiring.

Corrective

Act

ion

Correct settings.

Correct wiring.

Install a noise suppressor across

the coil of the re

la

y and/or

contactor.

Adjust the last transition to occur

beyond the sensor reset point.

Adjust last transition to occur

beyond the switch reset point.

Adjust the spacing

of

the

substates, and/or the gun and

sensor.

Or,

if

product spacing

cannot be changed, consider

using two channels wired in

parallel and triggered alternately.

If

this does not solve the problem,

contact your Nordson

representati

ve

.

Refer to

Sec. 3,

"Aligning

Sensors"

..

Refer to

Sec. 4,

"Programming

Tr

ig

ger

."

Figure

5.1

or

5.2.

Sec. 4,

"Programming

Transition."

Sec. 4,

"Programming

Transition."

PIN 108389A

57

-28 1/93

1 2 ... 90 91 92 93 94 95 96 97 98 99 100 ... 103 104

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