Curtis MultiMode 1228 User Manual

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Curtis 1228 Manual, Rev. F
8 Fine-tuning the vehicle’s response smoothness
Three additional functions—gear soften, soft start, and tremor compensa
-
tion—are available for softening and smoothing vehicle response. In most cases,
these functions can be used to maintain a high degree of responsiveness, while
still providing smooth vehicle operation.
Gear soften and soft start
These two parameters can be set from 0–100%, with 100% providing a
great deal of softening and 0% eliminating the function. They have by far
the most noticeable effect on older, worn transaxles.
8-a. Make sure the GEAR SOFTEN and SOFT START parameters are set to 0%.
8-b. While driving at both high and low speeds, release the throttle to neutral and
then reapply it before coming to a complete stop. Notice how the transaxle
gears bump as you reapply the throttle.
8-c. Change the GEAR SOFTEN parameter from 0% to 100% and repeat the same
exercise. Notice how the slop transition is softened, at the expense of a small
bit of nonlinearity in the acceleration rate.
8-d. Adjust the GEAR SOFTEN parameter until you find a setting you like, noting
that you probably won’t notice much of a difference if you’re using a brand
new, tight transaxle. Some users prefer a softened feel, while others prefer
this parameter set to zero because they want complete linearity in response.
In setting this parameter, you also may want to take into consideration that
softened slack take-up is easier on the transaxle gears and may extend the
transaxle operating life.
8-e. The soft start function is the same as gear soften, except that it applies to
accelerations from zero speed. Note that you’ll feel a transaxle bump only
if the gears are meshed in the opposite direction when torque is applied,
so you may need to nudge the vehicle backwards against the brake when
experimenting with this parameter. We recommend relatively small values
for the
SOFT START parameter (typically < 40%) to avoid excessive delay from
a stop. Having separate parameters for the soft start and gear soften func
-
tions allows you to set the
SOFT START parameter lower than the GEAR SOFTEN
parameter. Setting the two parameters the same in effect collapses them into
a single parameter.
Tremor compensation
The TREMOR COMP parameter controls vehicle response to sharp throttle
movements, such as those resulting inadvertently from hand tremors.
This parameter can be set from 1–5, with larger values providing steadier
response. The tremor compensation function somewhat overlaps the gear
softening functions. However, the tremor compensation function is active
all the time, while the two gear softening functions are active only during
a gear slack transition, i.e., a torque direction reversal.
5 — VEHICLE PERFORMANCE ADJUSTMENT

Curtis MultiMode 1228 Specifications

General

Brand	Curtis
Model	MultiMode 1228
Category	Controller
Language	English