Trim And Sub Trim Operation - Ko Propo EX-NEXT 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.
<Purpose of the 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
readjust. 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 designed as "center trims" that only adjust the
neutral position, while a new function called sub trim is used in connjuction
to enable the most optimal settings.
<Purpose of the Sub 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>
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.
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.46) so that the left and right wheels have the same turning radius and use
steering travel(p.46) to adjust overall steering angle.
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
P
●Sub Trim
48
Adjusting neutral position only
Initially, steering trim and throttle
trim are assigned to ET1 and ET2
respectively.
Left/Right angle range and neutral
position can be both be adjusted.