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Other › Futaba 7CHP programming
11-13-2005 01:28 AM  12 years agoPost 1
Joe2

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In trying to program my radio for my heli, I have come across a bit of a problem that prevents me from completing the setup. I trust that, with assistance from you, I will be able to achieve this. I have:

Futaba 7CHP Mode 2 radio with Futaba receiver and Servo
Joker 2 electric helicopter
611 Gyro
Actronic 80-32 ESC

I have programmed the helicopter to HR3 swashplate type setting and am running in PCM mode.

All functions (ie Collective Pitch / Rudder Stick and Elevator / Aileron Stick) appear to work 100%. The problem is that when I move the Elevator stick, it also moves my Throttle. The Servo is currently plugged into slot 3 of the Receiver. When I move the Throttle stick, only the swash plate moves up and down.

Until I fix this, I am unable to proceed. I would greatly appreciate any assistance.
Joe

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11-13-2005 05:58 AM  12 years agoPost 2
Squirrlybird

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Suffolk, Va US

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I am running the same radio on my maxi Joker. I found that the heli is exactly the same as the futaba instructions for programming the kyosho caliber. Read through that part of the instructions and it should help you. Also ensure that you dont have any wierd mixes enabled.

Good Luck,
Shane

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12-30-2006 02:12 PM  11 years agoPost 3
DANPOLOX

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Austin, TX - usa

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I have the same problem on my Raptor 50 and the 7CHP
I have spent about 6 hrs trying to find out where that throttle mixing is comming from. I tried EVERYTHING. I even spent 30 mins on the phone with Futaba. They were just as stumpped as I am.

I even changed my mode to airplane mode (no mixing). The throttle was still moving with my elevator.

Also... The throttle travel when giving elevator inputs is inconsitent. Sometimes the throttle moves a lot, and sometimes the throttle only moves a little.

This Heli just started doing this when I rebuilt it. I tore it down to do some upgrades and preventative maintenance (New clutch bell, new 401, etc.) When I put it back together, it had this programing problem.

PLEASE HELP

-Daniel

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12-30-2006 03:38 PM  11 years agoPost 4
nicoparis

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France

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When using a classic motor (not electric), and when you don't have any component to have constant RPMs like a governor, you can use a welcome function known as "mixing to swash". You put it for both aileron and elevator channel, and it gives more throtle (regards to the pourcentage that you programm for it) when using one or both. (to compensate the effort on the rotor).
Perhaps is this mixing option still activate on your transmiter? Set it to "inactive" or 0% if it's not the case.

Hope it is an idea for you..

Nicolas

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01-02-2007 05:47 PM  11 years agoPost 5
DANPOLOX

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Austin, TX - usa

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Very Interesting Electrical Prob
I found the problem!!!

I have always had the mixes set correctly from the start, but there was this unknown mix with the elevator, throttle, collective. The really weird thing was that it inconsistent from test to test. I would notice a small unwanted mix, then 5 mins later it would be drastic. The next test would be back to just barely noticeable. Also sometimes it would only be the throttle that would be mixed in with the elevator, but most of the time it was both the throttle and collective.

I decided that everything was programmed correctly and all the mechanics were fine, so the problem had to be in the RX or TX. I took it to the field to see if maybe someone had a Futaba radio that I could use to test my receiver. I found someone with a Futaba 9ch synthesized transmitter. He dialed into my frequency and we tested the elevator input. There was no unwanted mixing. Immediately we shut everything down and tried it yet again with my Tx. Like magic, everything was perfect!!!

I have flown a gallon through it doing moderate 3D maneuvers since with no problems.

I have very little knowlege of digital servo's, but my understanding is that they have set electronically set midpoints. They guy at the field thinks that while setting the heli up there was some binding on one of my servo's that messed with the electronic midpoint. He said that because his Tx has better resolution, it was able to reset the midpoint and get rid of the problem.

It still doesn't make much sense to me, but the problem is fixed. Let me know if anyone has any more info on why this could have happened.

-Daniel

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