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 Ultrasonic sensors will allow you to do fundamentally the same thing that the bump sensors do...so you can slow down and smoothly stop your robot just before it reaches the end wall, instead of running into it at full speed and then figuring out "ohh! there is a wall there!" - dlavery [more] |
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This is the first iteration of a sheet metal chassis.
All aluminum is 1/8".
It's 30x24".
Weighs 25.2 pounds
Older 4" AM Performance wheels.
Shifting transmissions geared for 13.8/5.2 FPS.
All chain is ran inside of the side rails.
The side rails have an open bottom.
The side rails are composed of 2 halves, allowing for easy removal of the sprockets without removing the transmission.
It still needs some work like adding a belly pan etc.
Discussion
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15-04-2013 19:31
pmangels17
Re: pic: Sheet Metal WCD
Wow looks great. However, I have two suggestions. The top CIM looks like it could warp the plate backwards if it isn't thick enough. Also, I know personally that chain inside tubes is typically problematic, though not impossible. I would recommend all gears if going inside the rails, and even then, you need large access holes. A better alternative would be to let the chain be outside the rain, so you can tension it with ease and access it more easily.
15-04-2013 19:56
theawesome1730
Re: pic: Sheet Metal WCD
I would be concerned about warping or torquing the frame where the wheels are. We had some minor issues with using 2x1 inch 1/8 wall aluminum tube on our WCD this season, so just a precautionary
15-04-2013 22:16
GMAdan
Re: pic: Sheet Metal WCD
Great job!
Though I agree with the comments above. I would be worried about warping the frame as well especially sustains a strong impact. I would think about gusseting some of the corners as well as maybe adding a mounting point for the gearboxes on that cross beam. That way not all the load is just on that side plate.
just my 2cents
16-04-2013 01:34
BJT
Re: pic: Sheet Metal WCD
You might want to look into what it takes to put bumpers on a wcd.
16-04-2013 07:42
theawesome1730
Re: pic: Sheet Metal WCD
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Originally Posted by BJT
You might want to look into what it takes to put bumpers on a wcd.
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16-04-2013 08:50
thefro526
Re: pic: Sheet Metal WCD
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Originally Posted by theawesome1730
Oh yes. Bumper mounting was a pain this year. It can be done with tube and a welder, but it will be more challenging with sheet metal
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16-04-2013 09:36
sdcantrell56
Re: pic: Sheet Metal WCD
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Originally Posted by theawesome1730
I would be concerned about warping or torquing the frame where the wheels are. We had some minor issues with using 2x1 inch 1/8 wall aluminum tube on our WCD this season, so just a precautionary
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16-04-2013 09:43
Akash Rastogi
Re: pic: Sheet Metal WCD
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Originally Posted by thefro526
On my previous team, we prototyped a 'sheet metal coast drive' in the off-season of 2011 and did sheet bumper mounts and they can be tricky. There is a bunch of information in this thread: http://www.chiefdelphi.com/forums/sh...ad.php?t=98808
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That drive also used 2x1 tubing and had 0 issues with the chassis as far as I know. Bellypan was integrated .090" pan into the front and back cross member. 10/10 would build again.
Overall, I must admit I enjoyed designing with 2x1 tube much more than with a pure sheetmetal frame. I felt that it simplified the design and was easier to have parts manufactured with a mix of tube+sheet.
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