Trim And Sub Trim Operation - Ko Propo EX-2 Instruction Manual

● Trim and Sub Trim Operation
The sub trim is a convenient feature but it could also complicate the setting process if used incorrectly. Use the sub
trim in the correct manner while also referring to the sub trim operation instructions on p.39 and p.44.
《Purpose of the Sub Trim》
When a servo is to be mounted onto a model, it is usually
connected to the receiver temporarily to enable the transmitter
to check its neutral position before it is installed. However, upon
running the model it is often the case that it does not run in a
straight line and the steering servo's neutral position has to be
readjusted. This adjustment function is known as the "trim," but
trim adjustment is not only done at the beginning, but it also must
be done during model operation to account for factors such as tire
wear and chassis warp. However, using the normal trim to make
these intermediary adjustments could cause other problems. In
the case of the steering trim, it could lead to different turning radii
for the left and right wheels. For throttle trims on glow engine
cars, the point of maximum braking, the full open position of the
carburetor, etc. would be shifted. For this reason, the normal trims
are designated as "center trims" that only adjust the neutral
position, while a new function called sub trim is used in conjunction
to enable the most optimal settings.
《Purpose of the Trim》
The effect of the sub trim is illustrated in the image on the right.
Adjusting the sub trim also moves the left/right angle range.
In contrast, the center trim moves the neutral position without
changing the angle range position. However, trying to compensate
the neutral position while making large sub trim adjustments may
throw off the model's left/right balance.
《Actual Setting Sequence》
① When installing R/C equipment, the servo's neutral position is
set first, then final adjustments would be made with the sub
trim after installation. However, if the sub trim setting value is
high, adjust the neutral position again.
② Test run to confirm neutral position. Adjustments during this
time should also be made with the sub trim. After neutral
position is fixed, adjust steering balance (p.38) so that the left
and right wheels have the same turning radius and use steering
travel （p.38) to adjust overall steering angle.
③ During the course of practice or racing, use the center trim to
correct slight changes to the neutral position. If the setting
value becomes high, correct in conjunction with the sub trim so
that the center trim value is zero.
P
Use the sub trim to adjust settings prior to driving instead of the center trim.
P
Install R/C equipment when the sub trim setting value becomes low.
P
If the neutral position becomes slightly off during driving, use center trim to correct.
● Trim (Center Trim)
Left/Right movement
range is fixed.
Initially, steering trim and throttle
P
trim are assigned to ET1 and ET2
respectively.
● Sub Trim
15
Adjusting neutral position only.
Left/Right angle range and neutral
position can be both be adjusted.