Servo interfacing, Servo interfacing explanation – Rapid-Air SERVO FEED: 100C, 100D series User Manual

Page 10

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A. TAUT STOCK INPUT

(J52)TB1-6)

This is a normally open contact from

a switch or device that monitors the

loop of material prior to the servo

feed. When the material reaches a

point that it trips the switch, a taut

stock has been reached. This input,

when received, immediately drops

the automatic which stops the feed

in progress. The material should be

repositioned in the die before

restarting the automatic sequence

as the progression was lost when the

taut stock occurred. This input also

could be used as a “No Stock” switch

that would monitor whether or not

there is material available to feed.

B. ENABLE INPUT

(J4)PIN 5 & 6)

The enable input is shipped from the

factory, jumpered, so that the Pac-Sci

unit is ready to work after the initial-

ization procedure is complete. If it is

desired that the servo controls are not

functional until other equipment or

safety source is activated before the

servo can function then a normally

open contact can be interfaced to this

input. If at any time during the feed

cycle the input changes state then

the feed will stop at this position. If

feeding stock, the referance will be

lost and the stock will have to be

manually repositioned to the correct

location. The automatic cycle will be

dropped and have to be restarted.

C. ENABLE OUPUT

(J52)TB2-15)

This output must be tied to a solid

SERVO INTERFACING

Servo Interfacing Explanation

state relay to interface to the ouside

world. The solid state relay must

have a D.C. coil and should have a

rating of 3-30 VDC. The Rapid-Air

#69100165 is recommended for this

application. This output is high when-

ever the enabled input is activated.

D. END OF FEED OUTPUT

(J52)TB2-13)

This output must be tied to a solid

state relay to interface to the outside

world. The solid state relay must

have a D.C. coil and should have a

rating of 3-30 VDC. The Rapid-Air

#69100165 is recommended for this

application. This output goes high

at the end of every feed and stays

high for programmed amount of time

before going low. To program the

time, with the menu display on, push

the period on the keypad - follow the

instructions and enter the time in

milli-seconds. The time entered will

add to the total feed cycle time and

if programmed to last longer than the

time from the actual end of feed and

the actual tripping of the feed switch

then the program will not see the feed

switch being tripped, you will then get

two hits per feed.

E. AUTOMATIC OUTPUT

(J52)TB2-11)

This output must be tied to a solid

state relay to interface to the outside

world. The solid state relay must

have a D.C. coil and should have a

rating of 3-30 VDC. The Rapid-Air

#69100165 is recommended for this

application. This output goes high

whenever automatic is selected on

the program panel. Any faults will

cause the automatic output to go low.

F. STANDARD PROGRAM -

DATA INSTRUMENTS INTERFACE

(J52)TB1-14)

With the jumper in place, the

standard program is active. Remove

the jumper, recycle power and the

Data Instruments program is active.

Only the manual mode will work

with the keys at this time.

G. KEYPAD AND DISPLAY

INTERFACE (RS232 PORT)

The keypad/display is the interface

between the operator and the resi-

dent program. The Pacific Scientific

drive is purchased with a great many

capabilities, none of which can be

used unless a program is written to

utilize these capabilities. Rapid-Air

put a great deal of time into making a

program that is user friendly and yet

gets the job done efficiently. We took

all the questions and constructive

criticism and came up with a program

that would cover all the applications,

yet be easy to interface and program

by a customer. If an operator reads

the programming procedure in this

manual and then reads the screen

parameters listed as they are dis-

played and acts on them by inputting

data as needed, the servo can be up

and running in a very short time.

1. Select a job number.

2. Input or review parameter for

that job number.

3. Thread up material in manual mode.

4. If properly interfaced, go into

automatic mode.

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