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HelicopterRadio - Servo - Gyro - Gov - Batt › 9Z Experts..Help!!
11-21-2006 05:04 PM  11 years agoPost 1
ShaCho

rrApprentice

LA (Lower Alabama)

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I am attempting to program my 9Z to operate my predator (nitro). All functions work as advertised except for the throttle kill switch (H). When switch is activated, the throttle servo increase whatever % is set instead of decreasing to kill the engine. I setup the throttle cut function (+/-) according the manual, however the cut function is operating backward. I scroll through the manual and all the radio setup features that would relate to my problem but found nothing. When operating my ship with my 9C, throttle function work correctly. Also, what setting are you using to operate your ship. Thanks.

Aim High!

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11-21-2006 06:05 PM  11 years agoPost 2
z11355

rrMaster

New England

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when you select RATE, there is a button in bottom left '+/-' which
reverses the sense. you should use that.

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11-21-2006 06:10 PM  11 years agoPost 3
ShaCho

rrApprentice

LA (Lower Alabama)

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9Z
Correct, and I tried that also but when selecting +/-, the servo increases it throw toward fully open when pos is selected and when neg is selected, the throw is reduced toward fully open position.

Aim High!

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11-21-2006 06:14 PM  11 years agoPost 4
ShaCho

rrApprentice

LA (Lower Alabama)

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9Z Experts..Help!!
If I reverse the servo, then throttle cut work as advertised but pitch and (throttle setting open/closed) is backward.

Aim High!

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11-21-2006 07:06 PM  11 years agoPost 5
fritzthecat

rrKey Veteran

Virginia Beach, VA

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Try:
Throttle trim at mid or higher.
Make sure the servo can move (ATV/ATR) to fully close the carb:
Throttle Trim all the way down, THCurve at 0%, adjust the ATV/ATR to fully close the carb. Move trim up to 1/2 or higher. ThCut will only move the servo to the lowest trim position as adjusted by ATV/ATR.
Engage TH CUT and run through the entire #s to see if the servo moves towards closed.

Fritz


'Send Money, Women and Guns!'

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11-21-2006 07:44 PM  11 years agoPost 6
gftazz

rrVeteran

upstate N.Y. in the Adirondacks

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You may have to raise up the trim like Fritzthecat says or,
Or I think I may have raised my throttle stick a click or 2 off the bottom of the radio and then set my throttle cut function so if the throttle is at the bottom of the radio it should lower the cut position down to kill engine below where the trim and throttle is at. Change the % ammount it moves too, to get it to move the throttle a bit more to kill it.

Tom

Oh No Someone Please Stop Me Before I Go Broke With This Heli Thing!!

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11-22-2006 02:28 AM  11 years agoPost 7
ShaCho

rrApprentice

LA (Lower Alabama)

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9Z Throttle Cut Problem
Tried what you guys recommended and the problem still exist. If you can think of any thing else that would correct the problem I have encountered, please don't hesitate to mention it. Thanks

Aim High!

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11-22-2006 11:13 AM  11 years agoPost 8
ex-celler

rrNovice

MA

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Could you list your ATV/AFR settings for the throttle?

Mine are:
Rev NOR
ATV 80, 98
AFR 100, 100
TRIM POS -13
THRCRV Point 1 - 0
CUT POS 100%
RATE -80%

Using the SVR screen, I can see CUT works properly. I reversed the throttle direction and it still worked correctly.

Try setting up a new model, leave everything at the default except activate CUT. If it works (it will!) you just have to find what's different

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11-22-2006 02:12 PM  11 years agoPost 9
fritzthecat

rrKey Veteran

Virginia Beach, VA

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Try setting the AFR to 140 and adjust throttle endpoints with ATV to less than 140.
Or vice versa.

Fritz


'Send Money, Women and Guns!'

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11-22-2006 11:24 PM  11 years agoPost 10
ShaCho

rrApprentice

LA (Lower Alabama)

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9Z Throttle Cut
Ex-celler,
I dialed in your setting and the throttle cut work as required regardless of the throttle sitck position. So, now it just a matter of dialing in the right AFR rate and adjusting trim. I really appreciate everyone inputs. Thanks.

Aim High!

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HelicopterRadio - Servo - Gyro - Gov - Batt › 9Z Experts..Help!!
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