Dual servo placement on 1 axle ?

[crawl rookie]

Dual servo placement on 1 axle


heey guys i have a question...
I have 2 servos that are coupled together and solderd bye the previous owner so i cant seperaten them but i want to buy a new servo like a hs-645 fot the txt
so 2 in the front and 1 hitec servo in the back
can i use the 2 servos? fot the front and put it on a Y cable reverse for the rear>?

sorry fort my poor english but im only 15 and dutch ...pfff
can anybody help me please
much apriciated

[WestCoastPJ]

depends on the ESC your using.If it has a low BEC rating,you'll need to run a reciever pack,or nitro servo regulator.what do you mean they are soldered together?The wires?You should run a independent rear stear,but the y-harness will work.Just make sure you check the BEC rating on your ESC.What ESC are you gunna run?

[jwrape]

Originally Posted by WestCoastPJ

depends on the ESC your using.If it has a low BEC rating,you'll need to run a reciever pack,or nitro servo regulator.what do you mean they are soldered together?The wires?You should run a independent rear stear,but the y-harness will work.Just make sure you check the BEC rating on your ESC.What ESC are you gunna run?

I would think he would need a receiver pack anyways. I have run my Roosters with two steering servo's and didn't have enough power.

[1BadJeepBruiser]

Definitely depends on the ESC's BEC out put, My friend Brian runs dual servos on the front of his race clod with custom mounts and the bottom link behind the gear box (uses custom mounts of the knuckles facing backwards), he also runs a rear servo for the tight tracks that is limited to only 3-5% throw (he has a futaba 3pk remote ). He also runs a reciever pack...









Hope this helps

Mike

[crawl rookie]

thanx guys i have 2 esc from novak that i can put in one is the uuhm let me think

the firts one with only forward movement is the novak hyper fetand the seond is the explorer mega fet sport
is 1 of these any goos
so i wanna put 2 accomas servos on the front ans one hs-645 on the back
the front ones are reversed already but have only one plug for the 2
do i need another y cable reverser for running that total of 3?
thanx for helping me with mu txt project

[crawl rookie]

btw i dont care running a reciever pack i realy aint going t build a realy comp rig but getting as close as i can

i still have to find some revo shafts and a gd-600 but im getteing a hard time here in holland because no lhs has them

im not building a real comp one because there are not much places i can crawl here in the netherlands beacuse there are no mountains at all the whole country is flat

[crawl rookie]

SO?? is it possible with one of the novak esc i mentiont before??

[JohnRobHolmes]

You can do it, especially if your servos are weaker ones. If they are strong servos you will over-drive the BEC and the ESC could shut down or smoke (depending on the circuit board it has).

[crawl rookie]

they are wekaer then the hs-645 fot sure and solderd trough wires so i cant seperate them so i thougt to run the 2 weka ones in the front and one hs-645 in the front so..

does anyone knwos if the bec of that esc's are good anough
im gonna run the seconad one i thinks because that one can drive reverse.
so can it be done with that novak speed controller?(explorer mega fet sport bec: B.E.C. (volts / amps)5.0 / 0.5
here's the link of the explorer:
http://www.teamnovak.com/products/es...ecs/index.html

[EeePee]

5.0 volts is good. 0.5 amp is bad.

[RD400]

If you run 2 servos that have differant transit times, you will fry a servo. I know this because I did it. One was .17 seconds, the other was .21 seconds. It took about 3 weeks and the faster servo cooked. It was turning the front tires plus the other servo. Way to much load.

[JohnRobHolmes]

You were running unmatched servos for one steering setup? That just wouldnt do.

[RD400]

Ya, it was stupid, was trying to get into the crawling thing cheap. Now I know its better to just bite the bullet and buy the right stuff

[wallaz]

If running twin servo's why have the track rod as well??

Had considered trying this arrangement instead of running digital's

[RD400]

To keep the both tires pointed in the same direction.

[crawl rookie]

SO master Eepee can it be done with that bec?

[wallaz]

Originally Posted by RD400

To keep the both tires pointed in the same direction.

I'm so embarrased I asked this now.

crawl_rookie, to answer your last question I would say not, if my understanding of electrics is right

Had a look at the Hitec website to investigate torque figures and also noticed the amp draw figures.

For the 645 alone at stall it draws 0.45A, that nearly all of your BEC gone on the one servo. You also have another two servo's to run. The speed and power of the servos are going to be severly hampered.

If you run the likes of the Telin Rebel 2, that comes with a 6V/5A BEC you will have more than enough to power the three servos.

While on the site I checked over the 5998's that I'm running, 0.24A at idle upto 3A at stall....no wonder at times the steering is a bit sluggish.

Looks like I could be investigating the twin servo route.

Figures for the 945 are 153oz of torque with a current draw of 6.6mA at idle upto 0.5A at stall. This I would say gives me 300oz of torque for a max of 1A draw. I could still run my 4WS for only 2A draw......less than the one digital servo.

[crawl rookie]

okay i get it

but what if i take a reciever pack for the servos and run only that 2 at the front ?

[wallaz]

If you're running a seperate servo battery pack then I don't believe you will have any problems

[crawl rookie]

so you mean that if u got 3 servos running and a servo pack ther are no problems with the esc?