Starting on a Robot

[team_orr]

Re: Starting on a Robot

2mm ali is too thin, i would get somthing thicker, 6-7mm would be better but again you could be better off getting somthing a bit thicker
also on the motor mounting front, most people use the robochallenge ones (if your using drill motors)

Jack

[gizz]

Re: Starting on a Robot

Hijacking a fewllow roboteer photo: http://i31.photobucket.com/albums/c367/ ... uild22.jpg
If you get 16mm nylon you can make an additional spacer out of plastic or something (the white ring by the motor) and just mount it in the bulkhead as shown.

[RogueTwoRobots]

Re: Starting on a Robot

Yeah, that's 15mm UHMWPE/RG1000 in that photo, and the depth of the drill motor collar bit is usually just over 20mm. The white plastic spacer is HDPE of 8mm thickness (so 23mm total) and the black metal plate on the end with the two screws in it is from the drill. It is usually the piece you have to remove after you have unscrewed the chuck and before you can remove the plastic torque limiter. The hole in the chassis (and white spacer) is a rectangle of size 25mm x 30mm. This allows the collar of the drill motor to just slide through and once the black front plate is screwed on, it holds the drill motor in place very securely. It essentially holds the drill motor in the same way as the Robo Challenge motor mounts but requires a little extra work on the builder's part to cut/drill/file the hole etc...

As for the ali, I agree 2mm is a little thin. I used 2mm chequer plate for a whole chassis once and it just couldn't withstand the constant ramming from other robots. That won't be much of an issue if you're using Nylon for the chassis, but for top armour I'd go a little thicker. I'd say 5mm would be thick enough, but I'm currently using 3.5mm chequer plate as top armour on Drumroll II and it does a good job. Having said that, it hasn't suffered any axe attacks yet but a little bit of good driving can go a long way to avoid being hit with an axe.

For the front wedge plate, I'd say 5mm should be your minimum. Again, I've used thinner stuff on front panels and it just isn't up to the job. The bottom corners in particular can be susceptible to being bashed and bent and that can mean your robot getting grounded if it is bent below the level of your wheels. Thicker material will be less likely to bend, but make sure the way it is mounted is nice and sturdy too; I've seen many front armour panels flying off my robots due to me mounting them insufficiently.