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View Full Version : pic: View of our Harvester 842

kE7JLM
30-01-2009, 00:58
[cdm-description=photo]32548[/cdm-description]
Martino
30-01-2009, 00:59
how did you attach the FP motor to the shaft? my team is working on attaching one for our picker-upper.

thanks
MrForbes
30-01-2009, 01:00
Looks like they used a piece of PVC pipe and cut slots in the end of it.
CraigHickman
30-01-2009, 01:43
Out of curiosity, how well does the Window motor powered belt work? We'll have one assembled with that motor by the end of the weekend, I'm just curious if it's fast enough in practice (our math said it is).
Michael Corsetto
30-01-2009, 03:01
Out of curiosity, how well does the Window motor powered belt work? We'll have one assembled with that motor by the end of the weekend, I'm just curious if it's fast enough in practice (our math said it is).

Depends on what you define to be "fast enough". The Denso motor has a free speed of 84 rpm's. If we assume the rollers will run at that speed (ignoring friction in the system), with a 2 inch diameter roller, and belt on both sides (ie sandwiching the ball), thats a travel rate of about 8.8 inches per second. For our system specifically, this simply isn't fast enough for us to be competitive, but every design is different. Looks great 842! Teams like you and 1726 should get special recognition for the openness you both have with your design process.

PS. I realize you did get the 2008 Chairmans Award, which is pretty good i guess :rolleyes: , but maybe a ribbon or something would be nice as well...
bmarick
30-01-2009, 03:52
congrats.

nice we have a similar pvc wheel design. bu we are using a piston to get the balls to the top of our system.
spc295
30-01-2009, 09:55
that bot looks really cool from the front.
Tim Spry
30-01-2009, 11:39
That looks like a clean design. How does it work with multiple balls in the chute? We were worried about rolling the balls against each other and having the straps on the balls catch on each other.
Sean Raia
30-01-2009, 13:12
Looks good, have you done any tests?
Magnechu
30-01-2009, 15:38
Is that chassis really legal? You might make the 2/3 rule, but certainly there's a rule that every corner must be protected by bumpers (at least 6 inches) on each of the corner, right?
Chris Fultz
30-01-2009, 15:41
All:

There are already numerous debates and threads and posts about the bumpers on 842. This thread is about the harvester.

Please refrain from commenting on their need for bumpers.

Thanks -
Vikesrock
30-01-2009, 15:44
Is that chassis really legal? You might make the 2/3 rule, but certainly there's a rule that every corner must be protected by bumpers (at least 6 inches) on each of the corner, right?

Haha, they most definitely know this by now (http://www.chiefdelphi.com/forums/showthread.php?t=71878&highlight=carmen). I believe they plan to install flat front faces on both sides in order to mount bumpers on them.
Magnechu
30-01-2009, 15:46
Sorry didn't see it :X
5n1p3r
30-01-2009, 20:47
I love the swiss cheese design on the frame, thats allot of weight u took off. :cool:
CraigHickman
30-01-2009, 23:57
I love the swiss cheese design on the frame, thats allot of weight u took off. :cool:

That's not their frame...
amariealbrecht
31-01-2009, 00:29
I really like the design, are you worried about multiple balls clogging your design?
Very nice job, good swiss cheese holes ---> Good Call!
Best of luck this year,
kE7JLM
31-01-2009, 00:58
Looks good, have you done any tests?

http://www.youtube.com/watch?v=xPaFyd0bOBU

http://www.youtube.com/user/KE7JLM
kE7JLM
31-01-2009, 01:09
how did you attach the FP motor to the shaft? my team is working on attaching one for our picker-upper.

thanks

We got a PVC coupler that fit nicely on the outside diameter of the FP motor spinning shaft thing, drilled some holes and it mounted nicely. To give it a little more we filled on some JB qwik. From the PCV coupler we poped in the some ABS the fit the diameter and put a bolt through that.

http://lh6.ggpht.com/_dvaPMGdJEi8/SXlI5xNpyHI/AAAAAAAABEg/SGcfmHuw7HY/s640/DSC01195.JPG
kE7JLM
31-01-2009, 01:13
Out of curiosity, how well does the Window motor powered belt work? We'll have one assembled with that motor by the end of the weekend, I'm just curious if it's fast enough in practice (our math said it is).

Take a look -

http://www.youtube.com/watch?v=xPaFyd0bOBU
kE7JLM
31-01-2009, 01:14
Depends on what you define to be "fast enough". The Denso motor has a free speed of 84 rpm's. If we assume the rollers will run at that speed (ignoring friction in the system), with a 2 inch diameter roller, and belt on both sides (ie sandwiching the ball), thats a travel rate of about 8.8 inches per second. For our system specifically, this simply isn't fast enough for us to be competitive, but every design is different. Looks great 842! Teams like you and 1726 should get special recognition for the openness you both have with your design process.

PS. I realize you did get the 2008 Chairmans Award, which is pretty good i guess :rolleyes: , but maybe a ribbon or something would be nice as well...

HAHA, thank you
kE7JLM
31-01-2009, 01:19
I love the swiss cheese design on the frame, thats allot of weight u took off. :cool:

O yes, our frame was 24 pounds and when we where done with it all it was 14.

From this -
http://lh5.ggpht.com/_dvaPMGdJEi8/SWWNwaMyEEI/AAAAAAAAAk8/X1-UQVTDXxQ/s640/DSC00602.JPG

To This -
http://lh6.ggpht.com/_dvaPMGdJEi8/SWbC6YKSHAI/AAAAAAAAAtg/B4tnkdX80iM/s640/DSC00811.JPG