Re: Cutting corners (on the robot!)
 

R26
BUMPERS must be supported by the structure/frame of the ROBOT (see Figure 4-10). To be considered supported, a minimum of ½ in. at each end of the BUMPER must be backed by the FRAME PERIMETER.

Al may say I am wrong but my take from the rules is that every side of the frame, in this case 8 sides, must have bumper attached. The rule states a minimum of 1/2 inch from each END of each face must be be backed by the frame. even though the corners are small they must have bumper with backing. If I were inspecting I would not allow it and I would back any inspector making the same decision where I am LRI.

Re: Cutting corners (on the robot!)
 

So Steve with what you said does that mean the KOP frame as built does NOT comply with 1/2" Frame Perimeter as there will only be the thickness of the outside plate?

Randall (2014 - 610 quick build electrical guy)

Re: Cutting corners (on the robot!)
 

You could fillet the corners instead of chamfering them. This would be more aesthetic while also maintaining the structural integrity of the corners.

Re: Cutting corners (on the robot!)
 

The kit chassis' outer structure has an upper flange. That flange extends .745 in the front and back of the robot at each corner. Therefore if the bumper is mounted to that it would be supported by more than 1/2" of material in the corner.

Re: Cutting corners (on the robot!)
 

For adding weight to our bumpers, we just use 1/8" thick 3/4" steel angle instead of the typical aluminum. We have had no issues at our regionals.


The advantage of more weight is more pushing power (for traction limited drives, because f=uN, and more weight is more N, equating to more f!)

Re: Cutting corners (on the robot!)
 

Dave,
Are you suggesting that you replaced the "optional aluminum angle" in Fig 4-8 with steel? I am sorry if you were told this was legal, I believe aluminum is the only allowed material for this part of the bumper. Please ask the Q&A.
Steve's response above is correct under the strict interpretation of the bumper rules. See Fig 4-6 for an illustration of areas of required bumper coverage and Fig 4-10 for an illustration of 1/2" support at the end of the bumpers.

Re: Cutting corners (on the robot!)
 

Thank you Dave, I totally forgot about the upper flange on top of the outer side plate which would make the frame comply with bumper rules.

Leave it AndyMark to come through again. Kudos for a job well done.:cool: