19

The most common I've seen is rack and pinion: Essentially you have two parallel beams with one fixed to the car's chassis. The other bar moves horizontally which changes the direction of the wheels. Attach some gears and you can hook it up to a steering wheel. The steering technique has been used in the Whirl N' Wheel Super Truck (5590) set. The ...


12

This can be done without a caster wheel as well: Start out with a three wheeled vehicle, with two wheels in the front and one smaller wheel with less traction than the front wheels in the back. All wheels need to be fixed. One of the front wheels is attached to the motor. This might need to have some gearing to get an appropriate speed. The other front ...


11

It's difficult, but not impossible. A rigid axle turning at the centre would be mechanically simpler. As my crude drawing illustrates; I would place a 24-tooth gear over the 2x4 wheel axle. A 8-tooth gear is optional but will provide finer control over the steering. The two teeth gears can also be replaced with a pulley gear. This technique however will not ...


5

In WeDo 2.0 app "LEGO® Education WeDo 2.0" there is a complete project 12. Steer that is exactly about that When it drives forward it goes in straight line, when it drives backward it then turns to one side. There is full build instruction in the app. I've also added distance sensor and made it fully autonomous - whenever it sees obstacle it goes back, ...


5

The simplest method would be to just have two motors, with one motor driving each side of track. To go forward, both motors forward; backward both back; to turn set one motor to go faster than the other, only drive one side, or set one forward and the other backward. It is a fairly common treaded vehicle steering system. The linked system with dual ...


3

I designed some WeDo 2.0 models that can drive and steer using just one motor. This one uses a system of gears to alternately drive the left or right wheel of a differential drive robot, depending on the turning direction of the motor. You can find the complete building and programming instructions here: https://robotics.benedettelli.com/lego-wedo2-zigzag/ ...


3

I was able to find a few elements that are able to make this connection possible. I'm guessing the designer used some type of bar-sized element which is made from a different material that is able to compress slightly more than regular ABS. For example, the softer plastic used on some minifig weapons seems to work nicely: Another option could be flexible ...


3

I can't say that I understand your problem, but maybe this link will help EV3 Move Steering Block Explained If you are asking about how the steering parameters relate to how much the machine will turn, then that is going to depend very much on the geometry of the machine: wheel diameter and wheel separation.


3

Here is a possible implementation using this exact part: Video . There are also several other solutions with different pieces if you need more inspiration or explanation: Animated GIF, 4 wheel steering, Top-down view.


2

Seeing a picture of your progress would help tremendously. The way the question is worded, it sounds like you were wanting to drive the beveled gear directly from the servo to the rack at a 90 degree angle. This won't work for two reasons: 1. The majority of Lego racks are not beveled. 2. The rack moves fore and aft as it moves side-to-side, which would ...


2

Too much backlash (play) in LEGO gears is an universal problem that unfortunately can't really be mitigated since all compatible LEGO gears are designed with very loose tolerances compared to professional gears. According to Sariel the bevel gears you tried using already have less backlash than regular gears, so you can't really expect any improvement by ...


2

There is a bit of confusion in your question with the part numbers and their location on the diagram. That is, you seem to have them reversed. Unfortunately I did not have a rechargeable version of the "AAA" battery box to test and prove the concept, but I was fairly certain it would work based on what I know about these battery boxes. Having a 7-speed ...


2

Look at the instructions for set 42048 Race Cart. It has rack and pinion steering without using a rack. It basically uses the same 2-long beam as you use on the servo, but uses it to push two pins with towball end either left or right. You can find the instructions online at LEGO.com.


1

I believe that it is the intention that the ratio between the speeds of the two motors is entirely determined by the turn parameter, not the speed parameter. I think the following code better represents how the turn block behaves: for (var i = -100; i == 100; i++) { turnfactor = 2*i/100; if (turnfactor >= 0) { motorB = speed; motorD = speed ...


1

I replicated the basic geometry of your steering build to use for illustration. I came up with two simple solutions that will work with your current setup. The steering servo is represented with a "M" motor because all of mine are in vehicles at the moment. The drag-link with ball joints setup can be greatly improved upon with ease, I just wanted to use ...


1

In the Ackermann system the lines through the rotating point of the wheel hub and the trackrod joint intersect on the rear axle. This works when the trackrod lenght is shorter than the hub turning point distance. For this part to work, you need to have a fixed ratio between axle track and wheelbase. So a long narrow car won't work and a short, wide car won'...


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