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HomeRC & PowerAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › TT zero alpha calibrating issues with DX7
02-10-2008 02:02 PM  10 years agoPost 1
Laurens

rrKey Veteran

Oegstgeest, NL

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Hey all,

I've been trying to get my TT zero alpha to run properly on my DX7. Now there's a problem. When I use the calibration setup provided in the manual I can't get it to calibrate.

I set the governor to AUX2. I tried both AUX2 to AUX2 and AUX2 to flightmode.

The start is made from engine idle. Then I toggle the switch once to governor on. I even tried switching to on and back. No matter what I try the led won't go off after that. Then I tried to go to full speed. Also tried going to full speed and back.

I'm at a complete loss here. There must be something I'm doing wrong but I've been trying for almost 2 hours now. At this moment the DX7 is on the charger so that means I got to try RR now...

Edge rotorblades, Scorpion systems

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02-11-2008 08:31 AM  10 years agoPost 2
Sucadi

rrNovice

Malelane South Africa

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I don't know if the programing is the same as the 9x. On the 9x I disabled the gov mode and set it up on my gear switch. I am now ale to switch the gov on or off as I please. Helps to get the engine tuned and perfects the throtle curves.

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02-11-2008 04:20 PM  10 years agoPost 3
tsokasn

rrApprentice

HELLAS

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Laurens
I hope that you will find the set up answer because I intend to buy a DX7 and I am already using the ZeroA(with no complaints I should mention!!!)Used to have a PCM 9X with it.

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02-12-2008 06:49 AM  10 years agoPost 4
helislider

rrNovice

Lake Arrowhead,CA -USA

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I used this set up off of raptor tech. and it worked for me. The only problem I had was trying to set it up using the F. mode switch. I could only get ten led flashes in F. mode 1. witch is 15000 rpm. My gear ratio is 9.1 so I could only get 1650 H.S. I just fly in F.Mode 2. at 16500 with a head speed of 1820. If you use #2 set up calibrate the gov. before you switch aux to F.mode. I have to toggle my aux2 switch several times to get the led to turn off.

1.Governor setup using the Aux2 switch to toggle between two head speeds and having governor turned off in Normal flight mode.
Step 1: Go to the system menu by holding both 'DOWN' and 'SELECT' buttons while you turn the radio on. Use the 'DOWN' button to get to [INPUT SELECT]. Press the 'SELECT' button to get to 'AUX2' and use the INCREASE button to choose 'AUX2'.
Step 2: Connect the Aux/Sense line from the governor/limiter to the Aux2 plug on the receiver.
Step 3: Connect 'THR' wire to the Throttle channel on the receiver.
Step 4: Go to [TRAV ADJ] and set the values for AUX2 to 100%.
Step 5: Next you need to setup the throttle servo. This will just be a standard servo setup as shown in the radio setup instructions here: http://www.raptortechnique.com/throttlesetup.htm However before doing step 15 you need to setup the RevMax. So leave the bottom throttle point at 0 and top at 100. To setup the RevMax move the throttle stick all the way down. Turn on the receiver and as soon as you see both receiver LED's light up then flip the AUX2 switch twice. The SET LED on the RevMax will flash green continuously if you did in fact enter setup mode. Move the throttle stick all the way to the top (the LED will turn yellow) then all the way back down (the LED will turn green). Now toggle the AUX2 switch twice to finish. The SET LED will go off. You can verify it is setup by moving the throttle stick up and you should see the green LED come on solid.
Step 6: Go to the system menu by holding both 'DOWN' and 'SELECT' buttons while you turn the radio on. Use the 'DOWN' button to get to [INPUT SELECT]. Press the 'SELECT' button to get to 'AUX2' and use the INCREASE button to choose 'INH'.
Step 7: Now go back to the throttle curve and set the bottom point to 20%. Go to the [PROG.MIX3] and set it as shown in the picture on the right This will set Normal flight mode to not have the governor on and when you are in Flight mode 1 or 2 you can choose between two different speeds by flipping the AUX2 switch.

2.Governor setup using the flight mode switch
Normal - governor off
Flight mode 1 - lower head speed
Flight mode 2 - higher head speed
Step 1: Go to the system menu by holding both 'DOWN' and 'SELECT' buttons while you turn the radio on. Use the 'DOWN' button to get to [INPUT SELECT]. Press the 'SELECT' button to get to 'AUX2' and use the INCREASE button to choose 'AUX2'.
Step 2: Connect the Aux/Sense line from the governor/limiter to the Aux2 plug on the receiver.
Step 3: Connect 'THR' wire to the Throttle channel on the receiver. Connect the 'SNS' wire to AUX2 on the receiver.
Step 4: Go to [TRAV ADJ] and set the values for AUX2 to 100%.
Step 5: Next you need to setup the throttle servo. This will just be a standard servo setup as shown in the radio setup instructions here: http://www.raptortechnique.com/throttlesetup.htm However before doing step 15 you need to setup the RevMax. So leave the bottom throttle point at 0 and top at 100. To setup the RevMax move the throttle stick all the way down. Turn on the receiver and as soon as you see both receiver LED's light up then flip the AUX2 switch twice. The SET LED on the RevMax will flash green continuously if you did in fact enter setup mode. Move the throttle stick all the way to the top (the LED will turn yellow) then all the way back down (the LED will turn green). Now toggle the AUX2 switch twice to finish. The SET LED will go off. You can verify it is setup by moving the throttle stick up and you should see the green LED come on solid.
Step 6: Go to the system menu by holding both 'DOWN' and 'SELECT' buttons while you turn the radio on. Use the 'DOWN' button to get to [INPUT SELECT]. Press the 'SELECT' button to get to 'AUX2' and use the INCREASE button to choose 'F.MOD'.
Step 7: Now go back to the throttle curve and set the bottom point to 20%. Go to [SUB TRIM] and set AUX2 to -125. Next go to [TRAVEL ADJUST] and set AUX2 +75% -10% as shown in the picture on the right.

Sub-trim: Use this to set the head speed for flight mode 1.
Travel Adjust +value: Use this to set the governor/limiter off in normal flight mode. You can use the monitor screen to set the AUX2 to the center (off mode).
Travel Adjust -value: Use this to set the head speed for flight mode 2.

Do not follow where the path may lead. Go instead where there is no path and leave a trail.

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02-14-2008 12:53 PM  10 years agoPost 5
Laurens

rrKey Veteran

Oegstgeest, NL

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The problem isn't setting the speed and such, everything goes wrong on the calibration of the throttle servo's deflections. No matter what I try the led just won't extinguish as the manual says.

I think I'll try to replace it under warranty.

Edge rotorblades, Scorpion systems

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02-14-2008 06:24 PM  10 years agoPost 6
helislider

rrNovice

Lake Arrowhead,CA -USA

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Make sure the magnet and the sensor are not lined up or the led will stay on.

Do not follow where the path may lead. Go instead where there is no path and leave a trail.

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04-05-2008 06:36 AM  10 years agoPost 7
Jesmond

rrNovice

Marsa, Malta

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Dear Friends

My problem is that I set the Zero Alpha like this.

Normal: 0% ( governor off)
Switch pos 1: 75% ( 15000 engine RPM)
Switch pos 2: 81% ( 17000 engine RPM)

On Futaba 7c 2.4GHZ.

Now yesterday I give it a try and in normal flight it works witout governor as described and when I switch to position 1 it stayed normal cause I had solid red led and than I tried pos 2 and it works.

I don't know why on pos 1 (15000 RPM ) it didnt worked and on pos 2 it work.

Can anyone help me at this matter?

Regards
Jesmond

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