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Drive
#1
I will be using Cary Christie's BMM/DMM for 'mounting' the head and Joe's Drive to power BB8. I picked Joe's drive because it appears that most people that have built it, have had very few issues with it. I'm also interested in Cary's drive, but it looks like it will be a couple more months for general availability and patience is not one of my virtues. Also, the cost of components is quite a bit higher than Joe's drive.

The complete drive will be printed in carbon fiber infused PLA to cut down on some weight and the increased strength.

Parts for the DMM:
[Image: attachment.php?aid=937]

Main square of the drive:
[Image: attachment.php?aid=938]

Motor spacing adjusters and bracket:
[Image: attachment.php?aid=939]

[Image: attachment.php?aid=940]

Assembly hardware (and more filament) should be here soon, so I can start putting things together.
[Image: attachment.php?aid=941]


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#2
Larry,

Did you see James Bruton's V3 BB-8 video series on youtube? If so, do you consider this drive system superior? I'm just asking because I am in the research phase of my next build.

Eebel
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#3
The club seems to be moving towards the axle drives - as the general consensus is that's what was used in the movie. I haven't seen his latest videos, but James started out with (and I believe is stull using) a hamster drive. Movement is a bit different between each method, Both work, but I think you'll find more support for the axle drives.

Then the trick becomes - which version to use, as there a few different versions of the axle drives. I think Cary Christies will be the most robust (once released), but his build seems to be a bit more expensive - he has one part in his BOM that costs as much as everything in the one I am building.
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#4
Received some hardware and motors this weekend, so starting assembling the drive. Should get the rest of the hardware this week - start purchasing electronics next payday.

[Image: attachment.php?aid=1015]


Attached Files
.png   drive_progress_1.png (Size: 1.26 MB / Downloads: 22)
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#5
That's a nice looking assembly. I like all the bearings.
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#6
Have you tested the carbon fibre to see if its stronger or lighter?
I bought a 1kg roll but haven't found a use for it yet.


You are a braver man than me for doing the motor but best wishes.
Having fun in 3d
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#7
(Yesterday, 10:23 PM)phul007 Wrote: Have you tested the carbon fibre to see if its stronger or lighter?
I bought a 1kg roll but haven't found a use for it yet.


You are a braver man than me for doing the motor but best wishes.

It is just a bit lighter (1.2 g/cm3 vs 1.25 g/cm3 with normal PLA) but a bunch stronger. It's a bit softer (so takes screws better), but not nearly as soft, or flexible, as PETG.

Sticks great and my machine loves printing it.
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