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HelicopterRadio - Servo - Gyro - Gov - Batt › 9303 Gimbal Concern
01-25-2007 07:55 AM  10 years agoPost 1
sed6

rrApprentice

OKC, OK

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All, the left stick on my 9303 seems to be developing 'slop'. That is to say at the full down position the input shows 2 on my screen, not zero. A firm pull down will yield a bit of flex in the radio somewhere and get it down to zero, only to go back to 2 when released. Anyone else notice this? Is this something I should warranty out to JR?


-------------------
-Scott D
T-Rex 600N
T-Rex 450SA

Practice at the field!

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01-25-2007 09:39 AM  10 years agoPost 2
VKGT

rrElite Veteran

Sanford, NC

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If you still have a warranty from JR, I would take this up with them for sure!

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01-25-2007 01:15 PM  10 years agoPost 3
jadams

rrKey Veteran

East coast USA

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Both of my 9303 transmitters do that. I sent one back to be checked out and they said everything was ok. I really have not noticed any problems with flying or programing my radio because of this issue.

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01-25-2007 02:44 PM  10 years agoPost 4
Don1127

rrApprentice

Manhattan, NY

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Scary, My 2 year-old 9303 hasnt had a problem. How old is your TX?

It's easy. Just pretend it's the simulator...

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01-25-2007 03:52 PM  10 years agoPost 5
TMoore

rrMaster

Cookeville, TN

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It's a calibration issue, nothing more.

TM

Delayed Response Operator Not Engaged

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01-25-2007 04:15 PM  10 years agoPost 6
JKos

rrProfessor

Redondo Beach, CA

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I haven't seen a tx of any brand or model yet that doesn't do the same thing. Push the stick hard enough and it will flex something for sure.

- John

RR rules!

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01-26-2007 04:51 AM  10 years agoPost 7
ESWLFSE

rrElite Veteran

Liberty Hill, TX

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I'd worry more about shipping it than it being off two points. Clearance the mechanical stop yourself and get it back.

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01-26-2007 05:53 AM  10 years agoPost 8
sed6

rrApprentice

OKC, OK

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How old is your TX?
18 months, and always babied, never dropped or tipped.
It's a calibration issue, nothing more.
Dunno what you mean by that...
I'd worry more about shipping it than it being off two points. Clearance the mechanical stop yourself and get it back.
I tend to agree with your first point. What do you mean by clearance the mechanical stop?


-------------------
-Scott D
T-Rex 600N
T-Rex 450SA

Practice at the field!

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01-27-2007 01:36 AM  10 years agoPost 9
TMoore

rrMaster

Cookeville, TN

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Dunno what you mean by that...
In the olden days the procedure was to place the stick in the center of travel, monitor the encoder output for that stick and mechanically adjust the pot for 1.5ms output. On modern computer radios this isn't necessary as you can calibrate the entire TX without touching the stick pots.

Your radio needs to have the sticks calibrated again so that it will be correct. On Airtronics radios, I just do it myself.

TM

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01-27-2007 02:34 AM  10 years agoPost 10
ErichF

rrElite Veteran

Sutton, NH

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I wouldn't worry about the top and bottom ends. Chances are you aren't using the full range of the channel anyways. If you are, JR end point adjustments go to 140%.

What I like to see is that the center white index mark is centered when the throttle/pitch channel output is 1500. If you have a Hitec Servo Tester/Programmer, you can see this. If not, go to an empty model memory so that there's no end point settings, mixes, or expos. Select the throttle curve or pitch curve menu, and monitor the graph. If the index line is centered when the painted index lines on the gimbal are also centered, you have a good pot calibration. If it's off a couple pixels, don't worry about it. If it's off quite a bit, you can adjust the pot center yourself, but only if you are comfortable with using mini screwdrivers inside your radio

Basically, it all depends on how picky you want to be about it. Like Terry said, the computer adjustability pretty much makes mechanical pot calibration a thing of the past.

Erich

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01-27-2007 07:05 AM  10 years agoPost 11
ESWLFSE

rrElite Veteran

Liberty Hill, TX

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What do you mean by clearance the mechanical stop?
If center is still center and the other end of the stick travel is also fine, the fact that you can apply pressure to get zero on the end in question seems to suggest you just need a bit more mechanical travel in that direction. There must be a plastic stop that you could shave it you wanted to do it this way.

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01-27-2007 04:20 PM  10 years agoPost 12
DrDan

rrVeteran

Potosi, Missouri

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I had that exact problem and come to find out that I had backed the tension screw ot a little too far and it was hittin the back of the transmitter. It may be something worth looking for. After I tightened the tension screw a littld, all was fine.

Dr. Dan

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01-28-2007 04:16 AM  10 years agoPost 13
sed6

rrApprentice

OKC, OK

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Thanks for the tip Dan!


-------------------
-Scott D
T-Rex 600N
T-Rex 450SA

Practice at the field!

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01-28-2007 05:18 AM  10 years agoPost 14
DrDan

rrVeteran

Potosi, Missouri

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Did that work for you?

Dr. Dan

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HelicopterRadio - Servo - Gyro - Gov - Batt › 9303 Gimbal Concern
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