Curtis MultiMode 1228 User Manual

Curtis 1228 Manual, Rev. F
25
THRTL GAIN
The throttle gain parameter sets the wiper voltage required to produce 100%
controller output. Increasing the throttle gain setting reduces the wiper volt
-
age required, and therefore the full stroke necessary to produce full output is
reduced. This feature allows reduced-range throttle assemblies to be used.
Examples are shown in Figure 10 to illustrate the effect of three different
throttle gain settings (1, 1.5, and 2) on full-stroke wiper voltage. Adjusting the
throttle gain also affects the neutral deadband, which is a percentage of the
throttle’s active range. Note: The deadband values shown in the bottom two
examples are the same due to rounding; the actual deadband in the bottom
example is somewhat narrower than in the example above it.
3 — PROGRAMMABLE PARAMETERS: Throttle Parameters
Fig. 10 Effect of adjusting the throttle gain parameter.
Single-Ended Throttle
Wigwag
Throttle
0 5V
Throttle Gain = 1
Deadband = 25%
1.5V
0 5V
2.0V 3.0V
2.5V
KEY:
Neutral 0
% 100%
Deadband output output
Notes: Voltages shown are at the pot wiper relative to B-.
Voltages are relative to a 5kΩ pot.
0.4V
4.6V
4.6V
V
100%
= Pot Low + (pot range / throttle gain)
V
100%
= 2.5V ± (0.5) (pot range / throttle gain)
0.4V
25%
100%
100%
Throttle Gain = 1.5
Deadband = 25%
Throttle Gain = 1.5
Deadband = 10%
Throttle Gain = 2
Deadband = 10%
1.1V
3.2V
100%
2.2V 2.8V
1.1V
3.9V
25%
100%
2.4V 2.6V
1.1V
3.9V
10%
0.7V
3.2V
0.6V
2.5V
2.4V 2.6V
1.4V
3.6V
10%
25%
25%
10%
10%
When a single-ended throttle is used, the throttle gain parameter sets
the maximum pot wiper voltage required to produce 100% output. When a
wigwag throttle is used, the throttle gain parameter sets the pot wiper resistance
required to produce 100% output in both forward and reverse: the wiper voltage
required for full forward output is decreased, and the wiper voltage required
for full reverse output is increased.
The throttle gain parameter can be set with values from 1.0 to 10.0.
The throttle gain value is the ratio of the pot’s full 5k
Ω to the resistance of the
throttle’s range of travel (G = R
pot
/ R
travel
). A setting of 1.0 thus represents a

Curtis MultiMode 1228 Specifications

General

Brand	Curtis
Model	MultiMode 1228
Category	Controller
Language	English