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chunkulator
Joined: 27 Jul 2016
Posts: 219
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Here's where I got to after a couple of evenings' CAD work on this concept:
And without the lid so you can see what's happening inside:
red: laser-cut 16mm Hardox 450 ring. ID 300mm, OD 348mm, 3 teeth protruding 20mm, mass 3.8kg. I will work on getting this as low to the ground as possible.
green: 6200 bearings (10x30x9mm), 8 for radial support, 8 for axial support
pink: 2.4kW 1400kV brushless outrunner
https://hobbyking.com/en_us/turnigy-t600-brushless-outrunner-for-600-heli-1400kv.html
, 1:1 #25 chain and sprocket drive to friction drive wheel (34mm black rubber on steel hubs), TZ85A ESC running SimonK
yellow: 2x BaneBots P60 gearboxes, 1:1 #25 chain and sprocket drive to wheels, BotBitz TZ85A ESCs (or maybe a pair of brushless 540 motors and TZ85as running SimonK)
dark grey: 2x Colson wheels 5x1 1/4" on BaneBots clamping hubs, 1/2" axles running in R8 bearings
blue: 2xLiPo 3S 3Ah 65C. Weapon runs off both in series. Locomotion runs off one of them.
light grey: chassis from 10mm 6061-T6 aluminium plate, top and bottom from 6mm 6061-T6 plate
Total mass (not including fasteners, wiring or polycarbonate shielding around the sides): 12.3 kg
Weapon: around 3500 RPM delivering about 25kJ hits (baby grand piano dropped from 10m)
Ground clearance: around 8mm at wheels
Perhaps some of the experienced spinner whisperers can please give me their suggestions on whether this seems on-target before I go working out more of the details. In particular:
- Will my rubber drive wheel evaporate?
- Is this support bearing configuration up to the job?
- Do I need ball castors front and back or just let the edge ride on the floor?
- How to defend against wedges?
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Mon Jan 09, 2017 10:20 pm |
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