Joystick 015-0175-00
SECTION
2
OPERATING
INSTRUCTIONS
OPERATING INSTRUCTIONS
General
To effectively use the 015-0175-00 Joystick, the opera-
tion and capabilities
of
the instrument must be known. This
section describes the operation of the instrument controls
and indicators and gives the adjustment procedure neces·
sary
to
modify instrument calibration
to
meet specific
needs.
Instrument Controls
CURSOR BRIGHTNESS and
IG
OFF.
This
is
a dual
purpose control
that
varies the intensity of
the
crosshair
cursor display and,
in
the switch detent position
of
the
control, disables the Interactive Graphic Unit
to
which the
Joystick
is
connected.
Control Handle. This single handle located
in
the square
cutout
area of the enclosing shroud
is
mechanically connec·
ted to the potentiometers
that
supply the X and Y Axis
positioning voltages. With the Joystick situated so the
READY light and CURSOR BRIGHTNESS/IG OFF con-
trol face the user, pushing the control handle away will
position the crosshair cursor display toward the upper part
of the display area. Setting the control handle
to
the user's
left will position
the
crosshair cursor display
to
the
left part
of the display area.
The
perimeter of
the
cutout
area
in
the
enclosing shroud corresponds
to
the limits of the display
area of the T4002 Graphic Computer Terminal Display
Unit.
READY Light. The READY light indicates, when it
is
lit, that the Interactive Graphic Unit
to
which
the
Joystick
is
connected
is
ready
to
accept new X and Y Axis positional
information.
The
READY light can only
be
lit when
the
CURSOR BRIGHTNESS/IG OFF control
is
in
some posi·
tion other than
IG
OFF.
Connectors
P1000
is
a 37
-pin connector used
to
connect the Joy-
stick
to
the Interactive Graphic Unit being used. Construc-
tion of the plug eliminates the possibility of improperly
installing it. A locking device on
PlOOO
securely attaches it
to the mating connector
on
the Interactive Graphic Unit,
and eliminates accidental disconnection or removal.
Calibration
Adjustments are accessible
on
the bottom panel of the
Joystick
to
facilitate calibration. The Joystick,
as
it comes
2
from the factory,
is
calibrated so the opening
in
the en-
closing shroud corresponds to the limits of the display area
of the Terminal Display Unit. However, the instrument can
be recalibrated
to
make the opening
in
the shroud corres·
pond to some lesser portion of the display area with no
detrimental effect
on
operation. Refer
to
the following pro·
cedure for instrument recalibration.
1.
Install
the
4901 Interactive Graphic Unit
in
the Aux·
iliary Compartment of
the
T4002 Graphic Computer Ter·
minal and connect the 015-0175-00 Joystick to the 4901.
2. Obtain a crosshair cursor display
on
the Terminal
Display Unit.
3. Set the control hand
le
of the Joystick
to
position the
intersection
of
the crosshair cursor display
to
the upper-
most part
of
the
display area.
4.
ADJUST-Y
Gain adjustment R12
to
set the inter·
section of the crosshair cursor display
to
the vertical posi·
tion desired.
5. Set
the
control handle of the Joystick
to
position the
intersection of the crosshair cursor display
to
the
lowest
part of the display area.
6.
ADJUST-Y
Offset adjustment R18
to
set the inter·
section of the crosshair cursor display
to
the
vertical posi-
tion desired. There will be interaction between step 4 and
step 6. Readjust until there
is
no further interaction.
7. Set
the
control handle of the Joystick
to
position the
intersection
of
the crosshair cursor display
to
the extreme
right-hand part of the display area.
8. ADJUST
-X
Gain adjustment R4
to
set the inter·
section of
the
crosshair cursor display
to
the horizontal
position desired.
9. Set the control handle of the Joystick
to
position the
intersection of the crosshair cursor display
to
the extreme
left·hand part
of
the display area.
10. ADJUST
-X
Offset adjustment R15
to
set the inter-
section of
the
crosshair cursor display
to
the horizontal
position desired. There will be interaction between step 8
and step 10. Readjust until there
is
no further interaction.
11. Recheck
the
Y Axis adjustments.
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