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Unread 28-12-2011, 05:05
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shai shai is offline
Team Captain
FRC #3083 (Artemis)
 
Join Date: Jan 2011
Rookie Year: 2009
Location: Israel
Posts: 22
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Re: pic: Artemis 3083 West Coast

Quote:
Originally Posted by Mk.32 View Post
It seems your design means that to switch bumpers one would have to undo 8 or more bolts. Having had a similar system our first robot, I can say it wasn't fun and we promptly changed it to something much faster.
Quote:
Originally Posted by apalrd View Post
With four individual bumpers (not a one-piece bumper), you need at least 8 fasteners for a solid connection. We had 10 this year, plus flanges that hooked into slots in the bumper supports.
The better solution is to either not have four individual bumpers, or use fitted bumper covers. We did the second this year, and it worked very well.
Actually, our bumpers mounts are designed so it can be used with no screws at all, or with 8 M4 screws. In order to lock the bumpers in place we insert a screw or a pin through the bumper mount and the frame, so it is fast to insert and prevent the bumper from moving.
We also use a bumper with changeable color as seen in this video by team 1937: http://www.youtube.com/watch?v=7PVkTPe7XIc , so we don't have to disassemble the bumper in order to get ready for a match.

Quote:
Originally Posted by Mk.32 View Post
Also, just wondering, how does one go about welding magnesium alloy? Same process as alum or steel?
We use gas tungsten arc welding for the magnesium profiles, so it is similar to aluminum welding, although it does require some special equipment and experience.

Quote:
Originally Posted by AustinSchuh View Post
Consider moving your corner brackets on top of the frame, and pop-riveting them in. This will make sure your frame is all aligned before it is sent to your welder, and make it easier to weld.
This is a good idea, I think we will do that.

Thanks you all
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