Futaba 7CHP - Help needed!!!

[chikut]

Hi all,

Need someone to help me,

I'm having a problem whenever I powerup my Dragonus, the swashplate moved to the right (from tail view). This problem I recently had after I re-charge the radio battery whole night till morning.

I've centered both the cyclic servo, then power up the swashplate still moved to the right.
I'm not so sure whether the settings were screwed up by mistakes or not... :arggg:

Below the settings (Normal mode) - Begineer level

swash:
type - HR3
aileron -55%
elevator - +55%
pitch - + 72%

throttle curve(n)
p5 - 100%
p4 - 75%
p3 - 50%
p2 - 25%
p1 - 0%

pitch curve(n)
p5 - 100%
p4 - 75%
p3 - 50%
p2 - 45%
p1 - 40%

reverse
1R,2,3R,4,5,6,7

sub-trim - all 0

e.point - all 100%

Hopefully someone could assist me to encounter the problem...

I'll try to attach some pictures for viewing.

[chikut]

seems like no one able to assist...

good news, manage to discover the problem, found a little piece of metal in the "variable resistor" this could be the cause of failure, once we remove it, everything goes back normal, no more moved to the right... :arggg:

[BarracudaHockey]

I'd make every effort to figure out where the metal came from before you fly that radio.

[chikut]

Hi Barracuda,

the setting's are confirmed correct by my senior (umran) who set it up for me. :hug:

me and umran decided to make some "surgery" to the radio after he confirmed that there was no faulty servos etc... we opened the radio and get a multi tester to check the "VR" linkage on the aileron stick. It was soldered nicely. We get a reading of the "VR" and seems like it's not giving the same values of the minimum & maximum input for left and right input. so we try to unsolder it from the circuit, then get the reading. First check the reading gives a bad values, both input didn't give same values. While trying to figure out what could be the possibilities of this errors, is it due to rust in the "VR" causing the failure and many more possibilities we think of... Seeing the "VR", i try to figure out where I could find the replacement. It's not easy to get it in our electronic device shop for the small thing like this... Finally we made a last reading and incredibly the reader gives a perfect value. What happen? nothing was done to it, we only turn it up and down trying to figure out the problem... Umran suggested that we dig out what's in that "VR", :dontknow he asked my decision, because it will be a final decision due to the risks where it might be faulty after being opened... i give green light to him and we opened the "VR". Seem like the board in it are in good conditions! Then only we found this small piece of metal dropped from the "VR" board. What is that? Where was it located before? Finally we realize that it could be a remainings which should not be in there... We joined everything back, solder it back to the board and get the readig, PERFECT! Now it's OK! We turn on the radio and power up the heli, there it is... no more errors. The swash now in a very nice position. CENTERED!

Just image what could happen if this occurs during the flight.... :roll: Unnecessary damage, injuries could happen... I was lucky it happens on land and not on air... :wink:

[chikut]

seems like no one able to assist...

good news, manage to discover the problem, found a little piece of metal in the "variable resistor" this could be the cause of failure, once we remove it, everything goes back normal, no more moved to the right... :arggg:

does anyone knows whether this little piece of metal is parts of the components of the "VR" or not? Please share with us...