4 Wheel steering questions

[knuckleslammer]

have a clod vehicle and I'm running a castle mamba max > 2 integy motors
What I'm wondering about is if I want to do 4 way steering, I got a typical receiver

SR 3000 Recieverhttp://www.amainhobbies.com/product_...oducts_id/3470

for a spectrum radio. I'm wondering

1. If I need a servo reverse harness and if you guys could link me to one. I can't find one anywhere

2. Do I need 2 castle electronics BEC's for 2 servos.

I'm wanting to set this up so that I can just use the wheel on the radio and have 4 way steering. No switch or anything. I want to keep it simple.

Thanks

[quickster47]

A lot of that depends on if you are running digital servos for your steering. I use the HiTec digital servos and have the programming box so I just reverse one of the servos and then use a 'Y' connector and drive them with the normal steering channel.

There is also an electronic piece that is a reverser and has a 'zero' adjustment and you can run both servos from the single steering channel.

Here are some examples:
http://www3.towerhobbies.com/cgi-bin...rser&search=Go

Carl

[knuckleslammer]

Originally Posted by quickster47

A lot of that depends on if you are running digital servos for your steering. I use the HiTec digital servos and have the programming box so I just reverse one of the servos and then use a 'Y' connector and drive them with the normal steering channel.

There is also an electronic piece that is a reverser and has a 'zero' adjustment and you can run both servos from the single steering channel.

Here are some examples:
http://www3.towerhobbies.com/cgi-bin...rser&search=Go

Carl

Can't I just hook up another servo to the aux channel on the receiver and flip the servo in the back? and reverse the linkages in the rear?

Here's the transmitter I bought

http://www.amainhobbies.com/product_...ducts_id/29216

[quickster47]

Problem is I do NOT think you can mix two channels on the DX3S. Meaning, there would be no way to drive the Aux channel from the sterring input.

Could be wrong on that though. But because of that limitation is why lots of folks prefer the Futaba 3PKS or the 4PK.

Carl

[knuckleslammer]

So what's my best option? A reverser?

Thanks for the help.

[quickster47]

My own opinion would be to use a reverser. I used one for many, many months and never had a problem. Only reson for my change was getting new digital servos and the programmer. And this was because I was doing lots of robotics work last year.

Carl

What I have been using:

http://www3.towerhobbies.com/cgi-bin...&I=LXMYH5&P=SM

http://www3.towerhobbies.com/cgi-bin...&I=LXTHR3&P=ML

http://www3.towerhobbies.com/cgi-bin...&I=LXSYU0&P=SM

[sierradmax]

You only need one BEC. Just solder the red "power" wire to the red wires for the servos.

[knuckleslammer]

Originally Posted by sierradmax

You only need one BEC. Just solder the red "power" wire to the red wires for the servos.

So I solder a wire from the + on the BEC to the red wire of the servos?

so Red (+) on BEC to both servos red wire? Even if I have the reverser?

I wish I had a diagram of how to set it up properly.

[sierradmax]

Here is my setup. Similar to what you are looking for however, I'm using 2 esc's. Simply keep the red wire from your esc connected to power the receiver. Jump the two servo's red wires to the red wire on the BEC. I don't think you need to plug in the signal and negative into the bat. port on the receiver. I don't remember if I did so.

EDIT: you're using a reversing Y harness.. Just plug in normally.



Are you headed to lincoln woods on saturday?

[knuckleslammer]

What's happening @ lincoln woods? A comp or just a meet?

[sierradmax]

comp/trailride and swapmeet. Check it out in the RI section under "northeast". I'll have my clod there and you'll get an understanding of my wiring.

[knuckleslammer]

Looks like I don't need the Y harness. Here's from the manual for the radio.

Was looking at the manual for the DX3S

AUX Setting
The Auxiliary Setting function allows trim adjustments on the auxiliary channel to be made and adjustments to mixing values on the steering to the auxiliary channel. Typically the mixing function is used in dual steering servo applications such as giant-scale trucks. The primary or controlling channel is steering while the channel that is mixed to is auxiliary. The auxiliary channel follows the movement of the steering channel
based upon the mixing value that is programmed.
Negative values cause the auxiliary to move in the
opposite direction. Note that the AX Trim is active for the Auxiliary channel only. The auxiliary channel (Forward/ Reverse) two-position switch allows dual mixing rates that expand capabilities to include crab steering as used in rock crawling.


Im just still confused as to how to setup the BEC. Do I need 2 BEC's since I'm using 2 servos?

[Bigcatnearmiss]

No you only need one BEC, positive wire can be split to several circuits.

Here a good thread on BECs, with diagrams on page 10;
Castle BEC- review and tech thread

Here is Castles website with several diagrams and user guide;
http://www.castlecreations.com/products/cc_bec.html

Cheers,
DC

[knuckleslammer]

I posted this in the other thread, but that one seems dead. Does this look right? And do I program the BEC for 6v and that will do 2 servos? Not 9V

I'm not an electronics guy, but I figured 2 6V servos require 12V but I'm probably wrong.

[Speedyboy]

Your BEC needs to be getting power from your battery.
Set it for 6V

[knuckleslammer]

Originally Posted by Speedyboy

Your BEC needs to be getting power from your battery.
Set it for 6V

Yeah I understand that, but 6V will power both servos is my question?

Thanks

[Speedyboy]

Yes 6V will power many servos. the servos take more amps the more you add. Your voltage should stay the same