Dragon 1.6 scale plastic wheels.

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Postby terry1956 » Sun Mar 24, 2019 12:51 pm

Hi, I am hoping to convert a 1:6 scale dragon panzer 2 to rc. I have looked at the wheels and wonder if there is a better way of producing them that are stronger and would give a better ride to the model. I have looked at the price of aluminium bar for the wheels but that’s just to exspensive, much the same in any other metal. I was also thinking of making the road tires out of dilren. I am going to fit a small roller bearing inside the wheel to improve things. Anyone have any ideas, thanks, michael

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Postby midlife306 » Sun Mar 24, 2019 1:44 pm

The way forward would be to 3D print them, you could have bearings & rubber tyres.
We’d just need some kind soul with some spare time to design them for us.
I could get some alli laser cut for the sprockets if a cad file was available
Cheers
Wayne


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Postby terry1956 » Sun Mar 24, 2019 4:21 pm

Hi, yes I can 3d print them with the bearing in place, will have. Ago tomorrow at drawing them out.

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Postby midlife306 » Sun Mar 24, 2019 4:23 pm

Awesome, aim for a bearing each side Terry
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Wayne


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Postby terry1956 » Sun Mar 24, 2019 7:07 pm

Hi, I am aiming for a bearing wheel set of lower hull, and one mid centre of wheel. That should balance the load.

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Postby midlife306 » Sun Mar 24, 2019 8:42 pm

Hi Terry,
Pic below is of one of Alwyn’s wheels for his 1/6 Bren gun carrier, it’s split in half down the middle to ensure a good external finish & there is a bearing in each side, I really wouldn’t recommend a single bearing in a 1/6 scale wheel, the forces involved are much higher than 1/16
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Wayne
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Postby terry1956 » Mon Mar 25, 2019 10:10 am

Thanks for pic, there will be two roller bearings per wheel axle. This will give me a bearing surface of 12mm which is more then enough for the weight and balance of the model. I printed off a test wheel last night and will have a play around once I have cut out the tires. There is space for a third bearing if needed but I don’t think it will be.time may proof me wrong.

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Postby midlife306 » Mon Mar 25, 2019 10:13 am

Hi Terry, hehe 3 bearings would be overkill, it will be interesting to see how you get on with these
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Postby terry1956 » Mon Mar 25, 2019 6:18 pm

Hi, I printed off a test wheel last night. I now need to wait until the Delfin turns up to machine the tire. I think that two roller bearings will be find.

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Postby midlife306 » Mon Mar 25, 2019 7:52 pm

You could always print the tyres with TPU
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Wayne


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Postby terry1956 » Mon Apr 15, 2019 6:37 pm

Having a go with TPU now, but I needed to set the print speed very very low as any higher and the filament stuck in the printer feed gears. Looks like it’s going to take a full two days to print one tire.

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Postby midlife306 » Mon Apr 15, 2019 6:45 pm

Hi Terry, what printer & what settings are you using?
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Wayne


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Postby terry1956 » Tue Apr 16, 2019 10:56 am

It’s an ender 3. I need to print at 25mm or the filament sticks in the gears. Temps, nozzle 210, bed 67. I am going to swap for Flexable play tomorrow, so hope that will speed things up a bit.

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Postby midlife306 » Tue Apr 16, 2019 9:44 pm

Hi Terry,
For TPU try your nozzle at 230 degrees, your bed at 55 degrees &30mm per second. Oh, don’t forget to disable retraction!!!
Think you’ll find it will work a treat
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Wayne


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Postby Tiger6 » Tue Apr 16, 2019 10:31 pm

At the moment I'm using Sunlu branded TPU, don't even need to turn the bed heater on (on the down side its quite a bit harder than Rigid Ink, but at least I can print at 30mm/s instead of 15)

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Postby midlife306 » Wed Apr 17, 2019 12:19 am

I think Terry was struggling with the feed as the nozzle temp he was using was too low


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Postby Tiger6 » Wed Apr 17, 2019 7:54 pm

Yeah, 230C is the way to go - I used to get away with a little bit less with the Rigid Ink, but it would occasionally jam.

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Postby terry1956 » Fri Apr 19, 2019 5:27 pm

I put the nozzle temp up, but still very slow going. Flexable pla works better for me, slow but better.

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