Why does it do this?

Hello, not sure if this is the right category to put this in. But anyways, I want to make a shopping cart which you can control, like a car, but replace the car with a shopping cart.

An issue I’m facing is that the actual driving part of the thing, the parts for driving just keep bouncing around and flinging and not staying where it’s supposed to be.

By the way, the entire shopping cart is CanCollide false.

Here’s a picture of what’s happening:
image

Does anyone know how to fix this?

Additional pictures of the shopping cart driving parts

Have you tried using a weld to keep it together?
I don’t have much Roblox Studio experience but maybe this helps?

I have not, what and where should the weld be used for?

A weld is used to hold 2 objects together. You chooses 2 parts that the weld has to keep together and they (normally) stay together

Here is some more info over welds:

Here is a short video that explains how it works to!

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debestevanal is right, you should use a Weld, Motor6D, or a WeldConstraint to keep the parts together. A WeldConstraint will probably work the best in this case, you can make one by either inserting it, or going to the model tab, and clicking Create in the Constraints group.

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Where should I insert the welds? Inside the wheels, centerPart, or Vehicle Seat?

It depends. Usually, you’ll have some sort of base part that’s the largest or widest, I can’t pick it for you, so you’ll have to choose yourself.

Should it be the vehicle seat? But it already has a “snap” in there which keeps it to the center part.

I think you should try the center part first. Sounds like it would work the best.

Maybe also check for existing welds, and find the part with the most welds? That would probably be where to weld.

I cannot add a weld?
image

You should use WeldConstraint, as I said earlier. It maintains the position of welded parts, unlike Weld. And, would probably work the best in your case.

Oops, sorry. Misread lol. Thanks, i’ll try it now.

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Now it just does this:
image

That’s probably because of CanCollide.

I turned all cancollide trues to false. Now it does this:

On what parts did you use the WeldConstraints?

I used 4 weld constraints on the center part. Each of those connecting to the wheels; BackLeft, FrontLeft, BackRight, FrontRight

Weld the shopping cart mesh to the center part using Weld Constraints. If the cart is a model, weld all parts to a main part in the shopping cart and weld the main part to the center part in the chassis.

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There are like 1k parts in this shopping cart (its a free model lol) which will take me a lot of time.

Why don’t you just get a mesh shopping car from the toolbox than a cart that has 1k parts?