Turning/Curving Causes

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windu34
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Turning/Curving Causes

Postby windu34 » Wed Mar 16, 2016 3:44 pm

What are some reasons for my vehicle curving?
I am confident that I built my vehicle perfectly straight and symmetrical seeing as how I only used 3D printed parts and carbon fiber for the frame.
How important is equal weight distribution?
Should the wheels be equidistant from the center of the vehicle? Would it affect the vehicle if they were offset?
While the curvature is most significant at high speeds, I do notice some curving at lower speeds.
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Re: Turning/Curving Causes

Postby Bazinga+ » Wed Mar 16, 2016 4:05 pm

windu34 wrote:What are some reasons for my vehicle curving?
I am confident that I built my vehicle perfectly straight and symmetrical seeing as how I only used 3D printed parts and carbon fiber for the frame.
How important is equal weight distribution?
Should the wheels be equidistant from the center of the vehicle? Would it affect the vehicle if they were offset?
While the curvature is most significant at high speeds, I do notice some curving at lower speeds.

I would make adjustable steering. Also at high speeds you need to clean the floor and your wheels before almost ever run. If your car still turns after that, and still turns even after you perfectly adjusted the steering, then that means that you are probably accelerating way too fast, causing unpredictable slipping.
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Re: Turning/Curving Causes

Postby JonB » Wed Mar 16, 2016 4:07 pm

windu34 wrote:What are some reasons for my vehicle curving?
I am confident that I built my vehicle perfectly straight and symmetrical seeing as how I only used 3D printed parts and carbon fiber for the frame.
How important is equal weight distribution?
Should the wheels be equidistant from the center of the vehicle? Would it affect the vehicle if they were offset?
While the curvature is most significant at high speeds, I do notice some curving at lower speeds.



I am going to suggest torque steer.

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Re: Turning/Curving Causes

Postby samlan16 » Wed Mar 16, 2016 6:55 pm

Hmm... did you check that your wheels are aligned and your axles are straight? I had some curving problems earlier and found that adding some small weights to one wheel fixed it.
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Re: Turning/Curving Causes

Postby Private Wang Fire » Sun Mar 20, 2016 1:03 am

samlan16 wrote:Hmm... did you check that your wheels are aligned and your axles are straight? I had some curving problems earlier and found that adding some small weights to one wheel fixed it.


Did you literally put weights on the wheel? Did that not affect the wheel balance at all?
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Re: Turning/Curving Causes

Postby samlan16 » Sun Mar 20, 2016 2:47 am

Private Wang Fire wrote:
samlan16 wrote:Hmm... did you check that your wheels are aligned and your axles are straight? I had some curving problems earlier and found that adding some small weights to one wheel fixed it.


Did you literally put weights on the wheel? Did that not affect the wheel balance at all?


Of course! This is actually a normal thing that you do with a real car to ensure that 1) the tires do not wear down prematurely and 2) there are no vibrations that could distract the driver, impact performance, etc. (and, in the case of EV, could result in undesired curvature) Pretty much the concept is to make the moments of inertia of each wheel equal without completely reorienting the wheels. It looks like
this
Image

so to scale it down for an EV, you could use some small lengths of wire or paper clips.

But you should still try to align your wheels before resorting to wheel weights.
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