Frsky hack module Futaba FF6 Hunting servos

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Frsky hack module Futaba FF6 Hunting servos

Postby futaba1024 » Fri Nov 19, 2010 8:40 am

Had this module for just over a week now (latest type with diode), fitted in a Futaba FF6 aniversary edition (T6X), range is excellent, but I have an a odd problem with the servos hunting.

It is more noticable on some servos than others, but it is present on all to a greater or lesser extent, at all stick positions full travel or centred.

The only time the servo hunting stops is when I put the module in low power range test mode, the problem goes away.

Any ideas?

Cheers.
futaba1024
 
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Re: Frsky hack module Futaba FF6 Hunting servos

Postby Phil_G » Fri Nov 19, 2010 10:19 am

How are you powering the hack module? Some trainer ports have a resistive power feed which isnt suitable for powering the module, it needs a good low impedance source at full battery voltage. That it works ok in low power mode suggests the power rail might be dipping under load... just a thought.
Cheers
Phil
There are 10 types of people in this world. Those who understand binary, and those who dont.
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Re: Frsky hack module Futaba FF6 Hunting servos

Postby futaba1024 » Fri Nov 19, 2010 11:47 am

Hi Phil.
Will get the multimeter out and check that, just put it all back together. the power at the trainer board is 9.6v and ppm 3.6v, but will check the 9.6v against direct battery power.

Cheers.
futaba1024
 
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Re: Frsky hack module Futaba FF6 Hunting servos

Postby futaba1024 » Fri Nov 19, 2010 1:14 pm

Ok, I am seeing 10.90v at the switch and 10.24v on the trainer board, would that have any effect?

Cheers.
futaba1024
 
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Re: Frsky hack module Futaba FF6 Hunting servos

Postby futaba1024 » Fri Nov 19, 2010 2:03 pm

Phil, thanks a million !!!!

Thought, threre's nothing to lose to take a power feed directly from the main switch............. By God! It worked, servos as quiet as a mouse, no hunting.

Connected a Hitec HS325HB, Futaba 3001, HXT900 and even a horrible Tower Pro MG995 digi all at the same time and all is perfect.

Thanks again for your sugestion.
futaba1024
 
Posts: 12
Joined: Fri Dec 07, 2007 10:12 pm

Re: Frsky hack module Futaba FF6 Hunting servos

Postby Phil_G » Fri Nov 19, 2010 2:14 pm

No problem, when you said "Ok, I am seeing 10.90v at the switch and 10.24v on the trainer board, would that have any effect" that confirmed it - there should be no drop at all, if there is its a resistive feed. They do it to protect the tranny against shorting the power wires in trainer leads.
Anyroadup, job jobbed, go fly!
Cheers
Phil
There are 10 types of people in this world. Those who understand binary, and those who dont.
Phil_G
 
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Re: Frsky hack module Futaba FF6 Hunting servos

Postby grummangoose » Fri Nov 19, 2010 3:38 pm

futaba1024 wrote:Phil, thanks a million !!!!

Thought, threre's nothing to lose to take a power feed directly from the main switch............. By God! It worked, servos as quiet as a mouse, no hunting.

Connected a Hitec HS325HB, Futaba 3001, HXT900 and even a horrible Tower Pro MG995 digi all at the same time and all is perfect.

Thanks again for your sugestion.

Just put the meter on mine and get the same voltage results as you. I will resolder the feed from the trainer board to switch. 8-)
grummangoose
 
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Re: Frsky hack module Futaba FF6 Hunting servos

Postby futaba1024 » Sat Nov 20, 2010 8:07 am

Hi Guys.
Test flight with this set up indoors last night with 4ch rx, superb very smooth response, very pleased!

Was using the Assan setup, but was never happy, had the odd lock out and the controls always felt "jerky" for want of a better word.

Going to try this kit outdoors this Sunday, sure it will be fine.

Cheers.
futaba1024
 
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