T8J rudder control oddity
02-19-2019, 09:33 AM
#1
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Location: Reading, UNITED KINGDOM
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T8J rudder control oddity
A friend brought over a T8J today because it he couldn't work out why one of the controls on his model didn't work.
After checking everything out, I found that the rudder (J4 in mode 2) would only work from -20 to +100.
The digital trim was centred, and even if I maxed it out one way, it wouldn't even up the control.
I reset the data in the transmitter, and couldn't see any mixes or such like which would affect this control.
Sub-trims and end points were all at default values. Stick travel feels fine, with no stiffness anywhere.
If I set the Servo page to scan through the ranges, J1 to J4 all went from +100 to -100 and back again correctly,
but as soon as this J4 output was under control of the stick, it went back to being way off centre.
Faulty transmitter ?
After checking everything out, I found that the rudder (J4 in mode 2) would only work from -20 to +100.
The digital trim was centred, and even if I maxed it out one way, it wouldn't even up the control.
I reset the data in the transmitter, and couldn't see any mixes or such like which would affect this control.
Sub-trims and end points were all at default values. Stick travel feels fine, with no stiffness anywhere.
If I set the Servo page to scan through the ranges, J1 to J4 all went from +100 to -100 and back again correctly,
but as soon as this J4 output was under control of the stick, it went back to being way off centre.
Faulty transmitter ?
02-19-2019, 10:58 AM
#3
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No. I did do a data reset of all model settings, which I assumed would do the same thing.
And I've just realised it was an 8FG not an 8J, in case that makes a difference.
And I've just realised it was an 8FG not an 8J, in case that makes a difference.
02-19-2019, 01:15 PM
#4
As Modtron noted, try a fresh model to make sure nothing odd is in the one model.
Also, try a different servo to make sure it was not programmed with odd endpoints (if it is a programmable type).
Also, try a different servo to make sure it was not programmed with odd endpoints (if it is a programmable type).
02-20-2019, 01:14 AM
#5
I would also check in the Servo Monitor menu to see what the particular channel is doing ???
Some more info would also help - model type, aircraft or heli, how are you setting this up, mode 1 or 2 ?
modtron
Oxford UK
Some more info would also help - model type, aircraft or heli, how are you setting this up, mode 1 or 2 ?
modtron
Oxford UK
Last edited by modtron; 02-20-2019 at 01:16 AM.
02-20-2019, 08:34 AM
#6
He noted in the 1st post that it is Mode 2 and that when he does the servo test he gets full movement shown on the screen.
I too would like to know what servos and if it is possible they are programmable perhaps?
