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-   -   Do we really need HDPE? (http://www.chiefdelphi.com/forums/showthread.php?t=132481)

jfitz0807 09-01-2015 12:53
Do we really need HDPE?
 
It looks like the HDPE is 0.25" thick. The field drawings show, for example, the scoring platform as HDPE on top of a 0.25" plywood on top of some two-by-fours (1.5"x3.5"). This adds up to the 2" height.

Of course, with 0.5" plywood on top of the two-by-fours, I also get the 2" height.

Is it worth the extra $$ for the HDPE to cover my field elements?

Hallry 09-01-2015 12:58
Re: Do we really need HDPE?
 
Quote:
Originally Posted by jfitz0807 (Post 1425049)
It looks like the HDPE is 0.25" thick. The field drawings show, for example, the scoring platform as HDPE on top of a 0.25" plywood on top of some two-by-fours (1.5"x3.5"). This adds up to the 2" height.

Of course, with 0.5" plywood on top of the two-by-fours, I also get the 2" height.

Is it worth the extra $$ for the HDPE to cover my field elements?
Driving over HDPE is definitely different than driving over wood. It's not so much about the height of the platform as it is the coefficient of friction of the material. You may also want to note that HDPE is used on the tote chute as well. I would definitely recommend getting at least a small sheet of HDPE to cover part of your scoring platform and the bottom of the tote chute to make your practice field a bit more realistic.

cgmv123 09-01-2015 13:03
Re: Do we really need HDPE?
 
You will want to get HDPE for the SCORING PLATFORM to accurately simulate driving on it, but wait until the GDC answers this Q&A question to know what finish to get.

CalTran 09-01-2015 13:06
Re: Do we really need HDPE?
 
Quote:
Originally Posted by cgmv123 (Post 1425056)
You will want to get HDPE for the SCORING PLATFORM to accurately simulate driving on it, but wait until the GDC answers this Q&A question to know what finish to get.
Quote:
Originally Posted by Q&A Answer
A. Good question, apologies for the omission. The answer is both. The HDPE used for the Chute Plastic (GE-15017 and GE-15018) is "smooth". The HDPE used for all other elements is "orange-peel". The drawings will be updated to include this detail and announced in an upcoming Team Update.
Answered.

IronicDeadBird 09-01-2015 13:09
Re: Do we really need HDPE?
 
I'm pretty sure there is a mathy way to figure out if the robot will drive on HDPE but if you want to have drive practice that ever involves touching the scoring platforms then it would be nice.

cgmv123 09-01-2015 13:09
Re: Do we really need HDPE?
 
Quote:
Originally Posted by CalTran (Post 1425060)
Answered.
Of course they answer it right after I post saying to wait for it.

wilsonmw04 09-01-2015 13:21
Re: Do we really need HDPE?
 
so the scoring platforms have a textured surface? that's good to know.

SenorZ 09-01-2015 17:19
Re: Do we really need HDPE?
 
Hmmmm. All the photos and videos make it look glassy. I guess if your robot can drive on smooth, it can drive on "orange peel," but that may be a poor guess!

Andrew Schreiber 09-01-2015 17:21
Re: Do we really need HDPE?
 
Quote:
Originally Posted by wilsonmw04 (Post 1425071)
so the scoring platforms have a textured surface? that's good to know.
Yes. At least the field in Manchester had textured surface on the sides. I don't recall the top though I think it all looked like the same material to me.


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