Command Descriptions
179
JOYA
Joystick Acceleration
Type
Joystick
Syntax
<a_><!>JOYA<r>
Units
r = units/sec/sec
Range
0.3 – 9999.9999
Default
10.0000
Response
JOYA: *JOYA10.0000
See Also
JOY,
JOYAA,
JOYAD,
JOYADA,
JOYAXH,
JOYCDB,
JOYCTR,
JOYEDB,
JOYVH,
JOYVL,
JOYZ,
SCALE,
SCLA
Product Rev
GT6K 6.0
GV6K 6.0
The
JOYA
command specifies the acceleration to be used during joystick mode.
UNITS OF MEASURE
and
SCALING
: refer to page
16
.
The joystick acceleration remains set until you change it with a subsequent joystick acceleration command.
Accelerations outside the valid range are flagged as an error, with a message
*INVALID
DATA-FIELD
x
,
where x is the field number. When an invalid acceleration is entered the previous acceleration value is
retained.
If the joystick deceleration (
JOYAD
) command has not been entered, the joystick acceleration (
JOYA
)
command will also set the joystick deceleration rate. Once the joystick deceleration (
JOYAD
) command has
been entered, the joystick acceleration (
JOYA
) command no longer affects joystick deceleration.
Example:
Refer to the joystick mode enable (
JOY
) command example.
JOYAA
Joystick Average Acceleration
Type
Motion
(S-Curve)
Syntax
<a_><!>JOYAA<r>
Units
r = units/sec/sec
Range
0, or 0.3 – 9999.9999
Default
10.00 (Default is a constant accel ramp, where JOYAA tracks
JOYA. S-curve accel is achieved when JOYAA is changed
independent of JOYA. To restore a constant accel ramp and
tracking, set JOYAA = 0.)
Response
JOYAA:
*JOYAA10.0000
See Also
AA,
AD,
JOY,
JOYA,
JOYAD,
JOYADA,
SCALE,
SCLA
Product Rev
GT6K 6.0
GV6K 6.0
The
JOYAA
command allows you to specify the average acceleration for an S-curve joystick profile. S-
curve profiling provides smoother motion control by reducing the rate of change in acceleration and
deceleration; this accel/decel rate of change is known as
jerk
. Refer to page
15
for details on S-curve
profiling.
Accelerating Scaling (
SCLA
) affects
JOYAA
the same as it does for
JOYA
. Refer to page
16
for details on
scaling.
Example:
JOYA10
; Set the maximum joystick acceleration
JOYAA5
; Set the average joystick acceleration
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