DaveBcool

This my second attempt at installing a servo for elevation in my tammy pershing...
I am using a 4ch Futaba 2.4 gHz w/ a fire button installed.
This is the sequence from the DMD to the servo.

Receiver > Dual Servo Extension Slot 1 > Tamiya Electronics Channel 3
Dual Servo Extension Slot 2 > 6" extension > Servo Rate Reducer > Micro servo

The elevation works fine.
The problem is when I fire, the servo "hops" a bit, enough to redirect the barrel.

I have tried to insert 1 or 2 more rate reducers in sequence.
The more I add, the less it hops when I fire.
However, with 3 rate reducers installed, the servo twitches the whole time.

Any thoughts?

TheBennyB

Maybe a DMD/MF recalibration with the rate reducers installed?

DaveBcool

Thanks Brett, I'll giver a try.

NCKT

Also, you may not be able to get rid of the "hop/twitch" entirely, depending on which type of fire button you use. I've used the momentary toggle type (triainer switch on a futaba) and that's the worst for this problem, second worst was the "radio shack" fire button. I use the click-y type buttons for firing. They are the type discussed here in this thread:
http://www.heatarmor.com/phpbb/viewtopic.php?f=12&t=689

DaveBcool

Yeah, I tried again today and re-set everything.
It was still a bit twitchy and jumpy.
Also, another problem arose after I took out the self centering spring on the Tx.
After I move the stick up or down 3 or 4 notches, the sound for the barrel elevation comes on and stays on.
Therefore, I cannot fire while it makes this sound.

I know guys use servos for elevation, what the hell am I doing wrong?

NCKT
I have a clicky button installed, along with a VBT (vibrating unit)

I also tried my Panther Tx, which has a Radio Shack cheap o rama momentary switch w/ no VBT.
It does the same thing.

Jeff489

My Feedback: (12)

I've never used rate reducers on mine (done it on about 10 so far).  I have always used the Dionysis camera positioner switches.  Never had any jumps or twitches.

TheBennyB

Dave,
Thought you knew of the elevation noise problem. Yup, can't fire when the elevation or depression sound is going. Most guys are using 5+ channel radios and
have it mixed into different channels. To stay with a 4 channel set up you'll need to get a camera mount servo delay. It slows the servo, but also stops it in positon so you
don't have to remove the self centering stick. I learned the hard way as well. For years I was doing elevation/depression fan shots with my PZ III since I had to elevate, let go of stick, then fire before my
barrel got off target.

http://dionysusdesign.com/product_in...fabaf3ab69fdf1