Team Coolspeedbot's robot builds

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coolspeedbot
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Re: Team Coolspeedbot's robot builds

Postby coolspeedbot » Thu Aug 17, 2017 2:23 am

Been trying to edit the CAD of Killer-Wolf 2, trying to shave off weight in places (not finding much I can comfortably remove). The Chassis weighs 55g, electronics weigh 75g and the flipper arm and panel weighs 20-30g. I managed to fit everything inside and got it up and running. Could do with so advice here.
James Booth
Team Coolspeedbot

Antweights:
Killer-Wolf (2 nearly complete), Bunny-Ears (1.5), HB (CAD).
Featherweights:
Wolf-E (under construction).

Hogi
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Re: Team Coolspeedbot's robot builds

Postby Hogi » Thu Aug 17, 2017 6:49 am

Hi. I usually drill some small holes in the chasis if I need to shave a gram off. Theres always some difference in scales though so you might be alright but its better not to take the risk.

The robot looks great by the way.
Featherweight under construction.

Antweight to build list: 4Wd lifter, new clusterbot, secret project, walker of some description.

Team Hectic.

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peterwaller
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Re: Team Coolspeedbot's robot builds

Postby peterwaller » Thu Aug 17, 2017 8:54 am

The biggest difference I found was changing to Alloy 910 nylon which will also solve your distortion problems.
This being several times stronger than ABS means you can thin down the sides and base a bit and still be stronger though it is more flexible so not too thin.
Also you don't really need to surround the battery just hold it in with double sided tape and dispense with the motor brackets and use the 1.6 mm mounting holes in the gearboxes.
Here are the bits of Flippant in 910 dyed blue the basic chassis weighs just 22.5 gms.
The side walls are 2.2 mm the back 2 mm and the floor 1 mm although I have since thickened the sides a little as it was well under weight.
Image

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coolspeedbot
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Re: Team Coolspeedbot's robot builds

Postby coolspeedbot » Thu Aug 17, 2017 2:11 pm

Hogi wrote:Hi. I usually drill some small holes in the chasis if I need to shave a gram off. Theres always some difference in scales though so you might be alright but its better not to take the risk.

The robot looks great by the way.


Well I did that with Killer-Wolf 1.5 and failed to shave any weight off of it, ended up using 1mm polycarb in places instead of 1.5mm polycarb.

And thanks, Killer-Wolf is starting to look more like the lego bot that it originated from.

peterwaller wrote:The biggest difference I found was changing to Alloy 910 nylon which will also solve your distortion problems.
This being several times stronger than ABS means you can thin down the sides and base a bit and still be stronger though it is more flexible so not too thin.
Also you don't really need to surround the battery just hold it in with double sided tape and dispense with the motor brackets and use the 1.6 mm mounting holes in the gearboxes.
Here are the bits of Flippant in 910 dyed blue the basic chassis weighs just 22.5 gms.
The side walls are 2.2 mm the back 2 mm and the floor 1 mm although I have since thickened the sides a little as it was well under weight.
Image


Well Peter I would give the 910 nylon a try but there isn't a printer in the UK that does that on 3D hub.

The battery cover was just down to preference over using adhesive stuff for holding the internals.

Well that be a interesting idea, but I'm not sure how much weigh would be saved removing the old mounts and adding a wall for the motor to mount to in the sides of the bot.
James Booth
Team Coolspeedbot

Antweights:
Killer-Wolf (2 nearly complete), Bunny-Ears (1.5), HB (CAD).
Featherweights:
Wolf-E (under construction).

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coolspeedbot
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Re: Team Coolspeedbot's robot builds

Postby coolspeedbot » Thu Aug 17, 2017 7:05 pm

Updated the CAD:

Image

And here it is compared to the old version (newest on the right):

Image

Now the question is how much weight could I be saving here.
James Booth
Team Coolspeedbot

Antweights:
Killer-Wolf (2 nearly complete), Bunny-Ears (1.5), HB (CAD).
Featherweights:
Wolf-E (under construction).

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peterwaller
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Re: Team Coolspeedbot's robot builds

Postby peterwaller » Fri Aug 18, 2017 9:01 am

Even if you don't have a 3D printer you can still install Cura then if you load the STL file in it will give you a reasonable estimate of the weight of the printed object.
I just loaded in the file for the flippant chassis above and it gave me 24 gms as opposed to the measured weight of 22.5 gms so not precise but it will give a fairly good indication of the weight savings you have made.
Also if you change the view mode to layers you can check out each layer and get a much better indication that the part is going to print correctly before you send it off.
https://youtu.be/mJlgEEcjR6o
Rather than drilling holes I found the honeycomb sections, in the base particularly, can help a lot.
Image

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coolspeedbot
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Re: Team Coolspeedbot's robot builds

Postby coolspeedbot » Fri Aug 18, 2017 12:34 pm

Oh cool, I'll give that a try Peter.
James Booth
Team Coolspeedbot

Antweights:
Killer-Wolf (2 nearly complete), Bunny-Ears (1.5), HB (CAD).
Featherweights:
Wolf-E (under construction).

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coolspeedbot
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Re: Team Coolspeedbot's robot builds

Postby coolspeedbot » Fri Aug 18, 2017 6:49 pm

Using the help of the Cura software Pete suggested, I've been cutting weight out of KW 2's CAD roughly looking to be saving 10g in weight.

Old Version (69g, Base = 62g, flipper arms = 7g )
Image

New Version (57g, Base=48g flipper arms = 9g)
Image
James Booth
Team Coolspeedbot

Antweights:
Killer-Wolf (2 nearly complete), Bunny-Ears (1.5), HB (CAD).
Featherweights:
Wolf-E (under construction).

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coolspeedbot
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Re: Team Coolspeedbot's robot builds

Postby coolspeedbot » Sat Aug 19, 2017 5:31 pm

Finalised the CAD and it's printing as we speak.

Image

Added supports for the print too.

Image

And started doing edits to my other ant concepts.

Image
James Booth
Team Coolspeedbot

Antweights:
Killer-Wolf (2 nearly complete), Bunny-Ears (1.5), HB (CAD).
Featherweights:
Wolf-E (under construction).

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coolspeedbot
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Re: Team Coolspeedbot's robot builds

Postby coolspeedbot » Sun Aug 20, 2017 2:33 pm

While waiting for the new print of KW2 I continued my work of my 6 wheeled bot H.B.

Image

Image

Image

Image

This could be my most complex design and also fun too.
James Booth
Team Coolspeedbot

Antweights:
Killer-Wolf (2 nearly complete), Bunny-Ears (1.5), HB (CAD).
Featherweights:
Wolf-E (under construction).

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coolspeedbot
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Re: Team Coolspeedbot's robot builds

Postby coolspeedbot » Tue Aug 22, 2017 7:26 pm

The reprinted chassis of Killer-Wolf 2 has arrived and can report I've managed to save 15 grams in weight.

Image

Image
James Booth
Team Coolspeedbot

Antweights:
Killer-Wolf (2 nearly complete), Bunny-Ears (1.5), HB (CAD).
Featherweights:
Wolf-E (under construction).

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peterwaller
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Re: Team Coolspeedbot's robot builds

Postby peterwaller » Wed Aug 23, 2017 8:08 am

That's a lot to save and it is looking rather stylish.
I also like the the 6 wheel drive it has weight saving built in by the look of it and should be interesting to fight.

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coolspeedbot
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Re: Team Coolspeedbot's robot builds

Postby coolspeedbot » Wed Aug 23, 2017 1:10 pm

Thanks Peter, your advice on the motor mounts helped with the weight saving.

HB (6 wheeled bot) is going to be a interesting experiment, it's going to be the most compact and shortest robot I've built. The height only being 2.2cm.
James Booth
Team Coolspeedbot

Antweights:
Killer-Wolf (2 nearly complete), Bunny-Ears (1.5), HB (CAD).
Featherweights:
Wolf-E (under construction).

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coolspeedbot
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Re: Team Coolspeedbot's robot builds

Postby coolspeedbot » Thu Aug 24, 2017 4:51 pm

Aaaaaaaaaaaand I just realised a issue with HB. I don't have enough space for the RX and ESC.

Image

Soooo I could remove the weapon and make it weaponless. But I can adjust the design to make it all fit.
James Booth
Team Coolspeedbot

Antweights:
Killer-Wolf (2 nearly complete), Bunny-Ears (1.5), HB (CAD).
Featherweights:
Wolf-E (under construction).

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coolspeedbot
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Re: Team Coolspeedbot's robot builds

Postby coolspeedbot » Fri Aug 25, 2017 1:46 pm

Already starting work on a slightly longer version to fit the weapon stuff.

Image
James Booth
Team Coolspeedbot

Antweights:
Killer-Wolf (2 nearly complete), Bunny-Ears (1.5), HB (CAD).
Featherweights:
Wolf-E (under construction).


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