2 9 J U N E 2 0 1 2
D R A F T
APPENDIX A: GLOSSARY
Curtis 1207B Manual
A-7
Ramp shape (throttle map)
“Ramp shape” is a programmable parameter that determines the static throttle
map of the 1207B controller. Eleven preprogrammed ramp shapes are available,
in 5% steps between 20% and 70% (20, 25, 30, 35, 40, 45, 50, 55, 60, 65,
and 70%). The ramp shape number refers to the PWM output at half throttle,
as a percentage of its full range. For example, if maximum speed is set at 100%
and creep speed is set at 0, a ramp shape of 50% will give 50% output at half
throttle. The 50% ramp shape corresponds to a linear response. The six “even
number” ramp shapes for maximum and creep speeds set at 100% and 0 are
shown in Figure A-1.
Fig. A-1
Ramp shape
(throttle map) for controller
with maximum speed set at
100% and creep speed set
at 0.
THROTTLE (percent)
PW
M (percent)
70%
60%
50%
40%
30%
20%
RAMP SHAPE
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
CREEP
SPEED
(0)
MAXIMUM SPEED
(100%)
Changing either the maximum speed setting or the creep speed setting changes
the output range of the controller. Ramp shape output is always a percentage
of that range. Ramp shapes with the creep speed setting raised to 10% are
shown in Figure A-2.
Fig. A-2
Ramp shape
(throttle map) for controller
with maximum speed set at
100% and creep speed set at
10%.
THROTTLE (percent)
PW
M (percent)
70%
60%
50%
40%
30%
20%
RAMP SHAPE
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
CREEP SPEED
(10%)
MAXIMUM SPEED
(100%)
