4 wheel steering conversion problems

[ShaynDaPain]

So I'm adding rear steering to my Everest 10, and I got a simple stupid question.

I think I need a y-split adapter to connect my rear servo up with my front steering servo. BUT, I saw a video somewhere that I need to reverse the rear servo (?) so that it turns, and doesn't just crab crawl. I can't seem to find a y-spit adapter with a reverse adapted for the rear servo. Any help would be appreciated...I'd be most happy if I could get a link to or a part number for the wires that I need.

Thanks in advance for any help.

[tapped-out]

Can you just flip rear servo opposite of front servo?

You'd be better off using a different ch for the rear servo if you radio will allow it.

[Panther6834]

Do NOT use a Y-harness for 4WS. '4WS' does NOT specifically mean "front & rear wheels turning opposite each other". Before explaining, to properly do 4WS on a vehicle, you need four things:
1) A transmitter that had 4WS modes.
2) A 3-channel (or greater) receiver, with at least one unused channel.
3) Two servos (preferably identical)
4) A second front axle, to be used at the rear.

While I have somewhat limited experience in the crawler side of RC, I have come to realize that axle-mounted servos are a better, and easier, way to don't 4WS, compared to chassis-mounted servos. As for my 2nd sentence, yes, the front & rear wheels turning opposite each other is one 4WS mode, but having front/rear toning the same direction is another. A third mode is front-only steering, and a fourth is rear-only steering. With a Tx that offers true/full 4WS modes, you have the ability to switch between all four modes. If you use a Y-harness, all you're going to get is to servos rotating identically to each other...that's not "4WS".


~ More peace, love, laughter, & kindness would make the world a MUCH better place

[Greatscott]

Originally Posted by Panther6834

Do NOT use a Y-harness for 4WS. '4WS' does NOT specifically mean "front & rear wheels turning opposite each other". Before explaining, to properly do 4WS on a vehicle, you need four things:
1) A transmitter that had 4WS modes.
2) A 3-channel (or greater) receiver, with at least one unused channel.
3) Two servos (preferably identical)
4) A second front axle, to be used at the rear.

While I have somewhat limited experience in the crawler side of RC, I have come to realize that axle-mounted servos are a better, and easier, way to don't 4WS, compared to chassis-mounted servos. As for my 2nd sentence, yes, the front & rear wheels turning opposite each other is one 4WS mode, but having front/rear toning the same direction is another. A third mode is front-only steering, and a fourth is rear-only steering. With a Tx that offers true/full 4WS modes, you have the ability to switch between all four modes. If you use a Y-harness, all you're going to get is to servos rotating identically to each other...that's not "4WS".


~ More peace, love, laughter, & kindness would make the world a MUCH better place

More or less, this is the right way to go about it. It gives you controllable 4WS. I run 4WS on my Bomber, and I just run the back servo off of the slider on my DX5R, its a little cheesy, but it works.

But, if you are just looking a simple steering system that turns the front and back wheels opposite of each other you can just install a Y-harness, connect everything and see if it works. If it doesn't work properly, just install a servo reverser on to the back axle's servo:

https://www.davesrce.com/product-pag...servo-reverser

[heyok]

I make a controller that gets you most of the way there:
4 Wheel Steering Controller