9CHPS problem

[stikflyer]

When I switched on my radio today I noticed that the heli wasn't responding like it should have. My left stick was controlling the elevator and the right stick was controlling the collective. It was as if the radio had been switched to mode 1 but I had not switched it.
I went to the mode change menu and it was still indicating mode 2. I switched it to mode 1 just to see what the result would be and everything was operating correctly again :dontknow
Mode 2 is throttle/rudder on the left stick is it not? Has anyone experienced anything like this before?

[BarracudaHockey]

Mode 2 is as you described, pitch/throttle and rudder on the left, cyclics on the right stick.

Did you tinker with your servos, I could see an incorrectly setup CCPM causing it to look like that.

[stikflyer]

I didn't touch any of the servos. I tried every swash type in the radio and switched between Mode 1 & 2 a couple times but I still had the same problem. Then as suddenly as the problem appeared it was gone, I think I may have a software problem :?

[tnreefguy]

Save your program to the campac modual and do a factory reset. That should get rid of the glitch.

[stikflyer]

Well I have been able to recreate the problem. I was playing with the radio last night and had everything setup and working in the proper directions ie: SR-3, throttle reversed and aileron reversed. I wanted to see what the effect would be if I set the aileron back to normal direction.
I would have thought that it would simply reversed the direction of that servo, but not so.
When I changed the direction of the aileron servo I now had the left and right cyclic/aileron being controlled by the collective/throttle stick and the elevator stick was now controlling the collective function.
I also get the same effect if I reverse the pitch servo.

My setup is:
Trex XL CDE
9CHPS
R148DFH(for setup)
Hitec HS-65
GY-401
9650

Can someone tell me if this is normal with the 9CHPS

[Motions]

I would defiantly be sending that radio in for repair. Please DO NOT try flying anything with that radio until you have it looked at. If it happens to switch sticks in the air, it's gonna be ugly.

[jlr]

In SR-3, all 3 servos work together for collective and pitch axis (elevator) cyclic and aileron/pitch servos handle roll cyclic. When you reverse one of the aileron or pitch servos, they now move the same direction (at the swash) as you move the right-hand stick side to side and opposite as you move the left-hand stick up and down. The difference between this and what stikflyer describes is that the elevator servo would still be moving with the left-hand stick.

So, stik, is the control of you elevator servo switching over to right-hand stick as well? Or does it behave as above?

--Jeff

[Motions]

That sounds almost right. If you reverse one of the 2 side servos, it would behave like that. If all three servos are moving when you use left/right cyclic that wouldn't be correct.

You have to pay attention to receiver channels and work with one servo at a time. CCPM can be tricky and leave you scratching your head at times.

[stikflyer]

So, stik, is the control of you elevator servo switching over to right-hand stick as well? Or does it behave as above?

--Jeff

When i reversed either the aileron or pitch servo the right /elevator stick was now operating the collective and the left sick up/down was giving me left and right aileron. It just seems weird to me.

[Pla]

There's nothing wrong with the radio.

When you reverse the elevator servo:
- when you move collective up, all servos should move up, however one servo moves down, and swash gets tilted instead of moving up - you get elevator effect.
- When you move elevator forward, swash should tilt forward (2 servos go down, one goes up), however the elevator servo is reversed, all servos go down -> swash goes down - you get collective down effect.

That is the reason when configuring CCPM you follow exact steps - to avoid changing 1 thing messing up everything.

[BarracudaHockey]

The hardest thing about learning to set up CCPM is getting servo (ch 1, 2 and 6) and function (Swash AFR) straight in your head.

If a particular servo is moving the wrong way you reverse the channel, if an entire function is moving the wrong way you change the swash AFR from a positive value to a negative one (or vice versa).

I personally hook up the elevator servo to the single servo spot, the other 2 dont matter. Then I use servo reverse to get them all moving the same direction with the collective stick.
Then Swash AFR to get all the functions moving the right way.
Then resist the temptation to fool with it!