Output Response To Throttle Demand; Fig . 24: Hydraulic Throttle Maps For Lift, For Controller; Fig . 25: Influence Of Various Parameters On Controller - Curtis 1297 Manual

Hydraulic throttle
Fig. 24
maps for Lift, for controller
with maximum speed set at
80%.
Influence of
Fig. 25
various parameters on
controller output response to
hydraulic throttle Lift
demand.
Curtis PMC 1297 Manual
3 — PROGRAMMABLE HYDRAULIC PARAMETERS: Hydraulic Throttle
B
100
90
80
70
60
50
40
30
20
10
0
0 10 20 30
HYDRAULIC THROTTLE INPUT (percent of active range)
to increase as soon as the throttle is rotated out of its normal neutral range
(deadband). Controller output will continue to increase, following the curve
defined by the throttle map setting, as the throttle input increases and will reach
maximum output when the throttle input enters the upper deadband (crosses
the Throttle Max threshold).
The hydraulic throttle map for Lift operates within the window estab-
lished by the Pump Max Speed, Hydraulic Throttle Deadband, and Hydraulic
Throttle Max parameters, as shown below in Figure 25. Pump Max Speed
defines the controller's output range, while Hydraulic Throttle Deadband and
Hydraulic Throttle Max define the hydraulic throttle's active range. These three
parameters, together with the hydraulic throttle map, determine the controller's
output response to throttle demand for Lift operation.
100
90
80
70
60
50
40
30
20
10
0
0 10 20 30
HYDRAULIC THROTTLE INPUT (percent of active range)
For Lower operations in applications using proportional lowering valves,
the throttle maps are similar to those shown in Figures 23 and 24 for Lift
40 50 60 70 80
80% Pump Max Speed
40% Throttle Map
(32% output at
half throttle)
40 50 60 70 80
THROTTLE MAP
80%
60%
50%
40%
30%
20%
SPEED PARAMETER
80% Pump Max Speed
90 100
HYD. THROTTLE
PARAMETERS
15% Deadband
90% Throttle Max
40% Throttle Map
SPEED PARAMETER
80% Pump Max Speed
90 100
55