Marui Samurai 4WD - Another SilverTriple's journey...

[Dadio]

Don't forget most tires will stretch of a fair bit , I have a set of 4 Optima re re tires on original rims and a set of four Rough Rider rears on another set of 3d printed rims that are a direct copy size wise , so you can have matching tires all round and the rears are the non stretched so have the extra support for the suspension .

[silvertriple]

Don't forget most tires will stretch of a fair bit , I have a set of 4 Optima re re tires on original rims and a set of four Rough Rider rears on another set of 3d printed rims that are a direct copy size wise , so you can have matching tires all round and the rears are the non stretched so have the extra support for the suspension .

I must recognize I didn't thought about this option. Thanks @Dadio

[silvertriple]

Samurai wheels... They are beautiful, and I'd like to keep the unique design for it when running my Samurai with some more modern tyres. That means different dimensions...

Tried to think about my strategy... And thought about a parameterized wheel in Fusion360, with the target of being able to create different size of wheels by just amending the diameter and the width (and eventually to be considered later on the type of wheel driver)...

Started to set some parameters in Fusion 360, creating a profile, revolving it, and so on...


And tadaaaa


I've not tried yet the next step, which is to change the parameters... But, I have some hope

[Dadio]

Looks good , you can just scale it up in Fusion then just amend the width and axle hole , very simple to do , the offset is different front and rear as well so you can use one model and just do a plane cut on the inner rim , move the hub to where you need it and recombine the rim and hub , I'd be tempted to make the spokes deeper as well for added strength .

[silvertriple]

Well, I do not master yet Fusion360, and the overal purpose is also for me to play with the way to do what I want...
The wheel is already scalable, the only thing I don't have scalable yet is the slot. I did my sketchs with constraints based on the the parameters and it doesn't scale for the slot while everything else is good which is already something good. Ultimately, I can do the slot quickly so not much issues here

For the rear side, I did not have one on my desk when I started. I may design it differently to take into account the differences. But I will have the front in 2" and 2.2" and the rear probably in 1.5", 2" and 2.2" inches at the end...
And i'll also look into setting different type of drivers and prepare a front 2WD version while at it, and all of that with different possible offsets... (I believe it is going to be quite easy from where I am already )

[silvertriple]

The "wheel resizing" feature doesn't work as expected yet. Some parts are not resizable yet, and the slot are not expandable. I believe it is due to the filets, and I may have to think more to get it right, but I already progressed a lot on that aspect. Went to bed far too late yesterday (this morning actually), and it was not solved, but at least, I had an idea during the night on what to to to make it work

[Dadio]

Confusion 360 been there a lot .

[Dadio]

Scaling should be easy , go to the Modify menu , select Scale , select the model and it will start you at 1 meaning 1x normal size , if you input 1.5 it will resize to 1.5x original size , just do the math and input the correct multiplier number , this should enlarge the whole model uniformly , after that just resize the axle hole , cut the extra off the inner wheel rim .
For the offset again from the Modify menu select Split Body and click on the inner rim circular face , this will split the model into two with the wheel rim and wheel hub separate , you can then move the hub or rim to the desired offset and one last time go to the Modify menu and select Combine then select both parts and recombine them .
This might be a little more complicated if Fusion is set to your native French but your English is so good I'm sure you can muddle through .

[silvertriple]

Well, I may redo my model considering this approach... I have something I may want to try first and could work. And if it works, I could actually make a configured wheel based on the width, offset, number of slots and internal tire diameter, with all the rest going as per those and few preset values around those...

And yes I work with Fusion360 in English. I'm working in IT, and was implementing enterprise software in my past as consultant, and the first thing I learned in IT was that working with software in English is by far easier when you have to search for an issue you face . English native people do not know how much they are lucky on this aspect, generally...

[silvertriple]

Milestone... (and thanks to @Optimafever for the hints)




Good progress done on the wheel definition. I can modify the number of slots, the arms thickness, the internal diameter of the tire...
Next on this is to add functions to add some proportionality to the slot internal and external diameter, and eventually on the hub size, but the key principles are set.

Next is to add rings to set the modern tire in place, and to apply the same principles on a rear wheel (and I did not have to redo the whole thing, just to tweak what I've done until now - for those trying to the do the same, extrude the slot without fillets, and apply fillets after that, it seems the fillet is not playing well with a parameterized circular pattern).

[silvertriple]

Continuing digging into the parameterization of my front wheel, with the idea than the spoke thickness should increase when the diameter of the wheel increase or reduce when the number of spoke is higher, and tried to add some parameters to do that.

It seems that confusion360 doesn't not like this, like the fillet, and move things even though it should not be affected by the calculation. I also noticed that you have to specify when creating a parameter it is a value without unit, even if you divide a distance by another as apparently, it doesn't consider it this way, and if you use this value to multiply a distance, it would trigger some error as you try to multiply millimeters with millimeters... I guess I touch the limitations of the parameterization... or it is just bugged.

Anyway, I will keep my wheel the way it is with 3 parameters to deal with to set it to another dimension or n-slot type, and I'll manage the spoke thickness by myself for the time being...

[Dadio]

That's clever stuff , I've never bothered with it myself , Fusion is such a huge piece of software it takes an age to self learn it also really struggles sometimes when there's a lot going on

[silvertriple]

Yes, definitely. Until I had to build this wheels with some(lot)thing(s) in mind, I was using Tinkercad just because it was much more easy to play with (but too limited, clearly, which means I already hit the limits of it in quite a few occasions). This is basically the second thing I designed with Fusion360 (the rear reinforcement from the Hunter was also made in Fusion360, but I did not really understood a lot of things). I started on Wednesday evenning this week on the wheel. Few hours later, I already did more complex things than what I ever did in Tinkercad. It's really powerful and it can do quite a lot of things... Between Wednesday and today I made a lot of mistakes, learned a lot of things, revert back other things, understood a lot more of things and so on... The basis to learn something...

Even found a way to make my wheel look like the real one


Then took the rear wheel out of the Samurai, and started to model it. It's not parameterized yet, but it's already in good path...


Once parameterized, I will be able to do something else . Maybe first will be to redo all my previous parts in Fusion360, again to learn new things, and maybe to even get them better than what they were initially with Tinkercad...

In the meantime, did not succeed to get the printer working again. I still have something that I do not understand: maybe my nozzle is partially cogged again and that could explain this. But it's very difficult to handle multiple things at the same time, specially while discussing with others on instant messenging at the same time (even if this sometimes helps )

[silvertriple]

Once you get the trick, it's surprisingly easy...



Make sure your apply all the required constraints. If you forget to apply linear axis colinearity with your first symmetry axis, it doesn't work with the circular pattern properly... In terms of wheels, I can already see some easy stuff to do

[silvertriple]

There is some stl for the tires on Thingiverse, I imported them and could not resist to look at my wheels with tires