Then you can believe it never happend
I’m going to pull values from this post without actually checking them. I trust @Owen. I’m also going to make a bunch of assumptions about your robot.
Cortex = 0.302
Motor = 0.2 * 12 = 2.4
Battery = 0.772 * 2 = 1.544
Wheel (4") = 0.232 * 4 = 0.928
C-Channel = .157 * 13 = 2.041 (EDITED from 9)
In total, 7.146 without any gears, screws, nuts, standoffs, wires, etc.
Wire count: I’ll assume you have everything directly wired to the cortex except the claw, and your ports 1 and 10 work, but you’ll need 2 y-cables for the 11th and 12th motors. You’ll also need a power expander, which means you need 4 cables to connect to it (right? I don’t use a power expander). I’ll assume these are 6" cables. Also, to have your claw reach over the fence, it has to be roughly 24 inches above the ground at some point, so I’ll add 2 24" wires, because your cortex is right next to your drive motors so everything else can be directly wired.
Motor Controllers = .02 * 10 = .2
Power Expander = ? (not on vex website, so never having held one I’ll approximate .100) = .100
Y Cables = .008 * 2 = .016
6" Cables = .004 * 4 = .016
24" Cables = .016 * 2 = .032
Current Total: 7.510
Gears and axles: I’ll assume that with a 2 motor claw and a 4 motor drive, you have a 6 motor lift. You’ll need 12 axles to go into each motor, as well as an axle in between each of the lift motors (2 for each tower, so 4), 1 for the lift arm, and 1 for each claw arm. This is 19 4" axles. I’ll assume that you have a 5:1 lift, but of course, you’re using high strength gears on the lift so you don’t chip teeth under the high torque. You’ll need 6 12 tooth metal pinions for the 6 motors, 4 idler gears in between the motors (36 tooth?), and 2 60 tooth gears as the output. Because you’re using high strength gears, you’ll need 8 circular inserts, and 4 metal ones. On a 5:1 claw, you’ll have 2 12 tooth gears and 2 60 tooth gears, but low strength, because claws require less torque.
19 4" axles: (.048/3=.016) * 19 = .304 (weight of a 12" axle divided by 3)
6 metal pinions = .002 * 6 = .012
4 HS 36 tooth gears = .012 * 4 = .048
2 HS 60 tooth gears = .030 * 2 = .06
2 LS 12 tooth gears = unlisted
2 LS 60 tooth gears = unlisted (combined I’ll call these .010)
Current Total: 7.994
Screws and nuts: As a good builder, and because you’re minimalizing everything else, every nut you use is a nylock. You’ll need 24 motor screws for the motors. Every connection will require 3 screws, and the screws you use average out to .5 in. Connect the metal on either side of the wheel in 2 places (2). Do this twice for 2 sides of the drive (4). Connect a bar to both drive sides (6). Connect both towers to the drive (8). Connect lift arm to both gears (10). Connect claw to lift arm in 2 places (12).
24 motor screws: .001 * 24 = .024
36 .5" screws: .004 * 36 = .144
36 nylocks: .003 * 36 = .108
Weights from CAD files.
Current Total: 8.220
So it’s possible. I think that most of the assumption I’ve made here are super minimalistic, and any sizable robot built with this as its parts list is going to be absurdly unstable. This also doesn’t include bearings, standoffs, sensors, wiring clips, other wiring tools, zipties, rubber bands for the lift or claw, LCD screen, non-functional decoration, etc. But it’s possible.
It took me longer than I’m willing to admit to write this.
I am litterly going to do this right now, btw the part about the gears and axels is off, and the 9 c-channls was a mistake of mine, i used around 13 i think also read my post on the other thread.
I assume by off you mean I’m high. I’m pretty sure that I’m very low on the screws though, and doubling my numbers there wouldn’t seem unreasonable.
I will pm you tomarrow with the list
I used under 3 and 1/4 of a 1x2x35 C-channels for my base (holonomic), 2 and 1/4 for my towers, 2 for the arms, 1/2 for my claw holder, and 2 for my claw arms, which is 10 total