Currently our robot’s Chassis and bumpers have a large gap in between. From my understanding the wood should only be of a certain thickness (3/4 inches). And I was wondering what they might consider “structural integrity” to mean. (R.29.) Is having a 1 inch gap of plywood at the corner of the robot against its “structural integrity”?
Is it recommended to glue another small wooden piece into the corner?
And what is recommended for the gap on the chassis to the plywood? The reason we can’t move the bumpers in is because we would be passing the 1/4 minor protrusion area that would be given for our rope climbing attachment. So at this point the major consideration is to just add a part onto the chassis that will not affect the wheel or chassis in any way, just making it not necessarily aesthetically pleasing.
Please read R31 in the manual
A 1" gap can be accommodated, it is all in the details. Post a pic/drawing of your robot with the bumper attached.
>Is it recommended to glue another small wooden piece into the corner?
Robot: Allowed
Bumper: Not allowed.
>making it not necessarily aesthetically pleasing.
With the bumper on, who is going to see it?
A photo would be helpful. It isn’t clear if the gap is between the bumper wood and the chassis or between pieces of bumper wood, nor in what direction.
Here’s a pic.
Can you post the picture someplace that doesn’t require us to create an account in order to see it?
It’s difficult to tell from the photo, but it looks like you will need to redo your whole front bumper mount. Additionally, the end of your front bumper must be flush with the outermost part of the right bumper.
To do this, you need to extend one of those 2 bumpers an extra 3 1/4" and they must be fully covered in colored cloth. See 8.5 R30 in the game manual.
For the mounting:
As stated it 8.5 R31, bumpers must be supported on the edges by atleast 1/2" of the frame. This means not only does the corner of your robot need to be filled, but you must also support the open side of your front half bumper.
Assuming your robot is symmetrical, you will also need to fix this on the left side and possibly on the back of your robot as well.
See the figure in 8.5 R31 for a clear diagram.
3 problems I see:
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there needs to be a frame backing each end of the bumper, including the corner.
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The corner of the bumper needs to be filled in (outside corner where the 2 bumper pieces meet).
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The wood is too far from the frame. Can be ignored if there is frame right behind the ends of the bumper.
Ideally, the bumpers should be mounted flush to the frame.
i put together a slide show to talk about what i see and how you could fix some of it.
http://imgur.com/a/uLML6
It’s impossible to judge all rules based on the picture (for example, R22 and R23). However, here are the rules that you’ll have trouble with:
R29 B. hard BUMPER parts allowed per R29-A, R29-E, R29-F, and R29-G must not extend more than 1 in. (~25 mm) beyond the FRAME PERIMETER with the exception of minor protrusions such as bolt heads, fastener ends, rivets, etc. (Figure 8-3 and Figure 8-5).
From the look of it, the hard parts of the short bumper extend way more than 1" beyond your FRAME PERIMETER.
R29 D. be covered with a rugged, smooth cloth. (multiple layers of cloth and seams are permitted if needed to accommodate R26, provided the cross section in Figure 8-5 is not significantly altered).
The cloth must completely enclose all exterior surfaces of the wood and pool noodle material when the BUMPER is installed on the ROBOT. The fabric covering the BUMPERS must be solid in color.
The ends of your bumpers do not look covered, they are just noodles. You need to have those ends covered with red/blue as appropriate for each match!
G. must attach to the FRAME PERIMETER of the ROBOT with a rigid fastening system to form a tight, robust connection to the main structure/frame (e.g. not attached with hook-and-loop, tape, or tie-wraps). The attachment system must be designed to withstand vigorous game play. All removable fasteners (e.g. bolts, locking pins, pippins, etc.) will be considered part of the BUMPERS.
The bumper is not attached to the FRAME PERIMETER, it is stood off the FRAME PERIMETER a good distance.
R30. Corner joints between BUMPERS must be filled with pool noodle material. Examples of implementation are shown in Figure 8-6
Fill in those corners!
BUMPERS must be supported by the structure/frame of the ROBOT (see Figure 8-7). To be considered supported, a minimum of ½ in. (~12.7 mm) at each end of each BUMPER wood segment must be backed by the FRAME PERMIETER. “Ends” exclude hard BUMPER parts which extend past the FRAME PERIMETER permitted by R29, part B. Additionally, any gap between the backing material and the frame:
A. must not be greater than ¼ in. (~6 mm) deep, or
B. not more than 8 in. (~20 cm) wide
This is the big one. The ends of your bumper are NOT supported by your frame. The frame needs to actually back your bumper. From the looks of it, the frame member you have there is not 6" long, meaning it can’t actually back the inside end of your bumper - you need to get an extension on there to support the end. No cantilevered bumpers are allowed!
Please, read the bumper rules carefully and get them fixed before you bag tonight!
Thank you so much engunneer!!! I could not have asked for a better answer! Very instructive PowerPoint and I will refer others to you! I’m trying to get others to start using this amazing cite and I am definitely going to use your posts as an example of this excellent resource!
Thank you again for your time!
- Team 5557 BB-R8ERS