broken link

broken link
Posted by at 2011-01-27 09:08:36
Hi Chris I am unable to access the newly posted PDF .
Re: broken link
Posted by at 2011-02-08 16:02:24
The Website Team is currently working on a resolution to this problem, and it should be fixed soon.
wrote on 2011-01-27 09:08:36:
Hi Chris I am unable to access the newly posted PDF .


Re: broken link
Posted by at 2011-03-08 16:15:32
I can't access it either.  This is my second year doing seaperch in a 4th grade classroom.  Last year, our propellers fell off during theell off oneis year the entire propeller shaft fell off on 3 out of 5 robots.  We did use the epoxy glue.  Were we allowed to use other materials to keep them on the motors? 
wrote on 2011-01-27 09:08:36:
Hi Chris I am unable to access the newly posted PDF .


Re: broken link
Posted by at 2011-03-08 16:16:59
Sorry.  Our propellers fell of during the competition the first year.  This year, the propeller shafts fell off the robot.
wrote on 2011-01-27 09:08:36:
Hi Chris I am unable to access the newly posted PDF .


Re: broken link
Posted by Rich at 2011-03-10 02:48:21

SeaPerch propellers often fall off IF the thruster (motor) shafts are not cleaned VERY well with alcohol before applying the two-part adhesive to attach the shaft couplers.  You will recall that they were pushed through wax during the potting process, which would prevent most any adhesive from sticking.  Fortunately, a little shaft re-cleaning and then application of a few drops of super-glue (or even hot-melt glue) can ususally fix the propellers quickly to get the ROVs back into the water.

The new supplement to the revised construction manual also details two alternate approaches for propeller mounting, one that uses a clever solder-on technique and another that replaces the shaft coupler with a small styrene plastic bushing (and the propellers are then pressed onto the shafts, and they never come off in water if installed per the instructions).

wrote on 2011-03-08 16:16:59:
Sorry.  Our propellers fell of during the competition the first year.  This year, the propeller shafts fell off the robot.
wrote on 2011-01-27 09:08:36:
Hi Chris I am unable to access the newly posted PDF .




Re: broken link
Posted by at 2011-03-10 12:42:55
Where would I find the revised construction manual?  Can you post the link?
wrote on 2011-01-27 09:08:36:
Hi Chris I am unable to access the newly posted PDF .


Re: broken link
Posted by at 2011-03-10 16:47:38
I'm working with an engineer now who wondered if we could use motors that were made for being underwater rather than the ones sent to us in the kit? 
 
wrote on 2011-01-27 09:08:36:
Hi Chris I am unable to access the newly posted PDF .


Re: broken link
Posted by jconallen at 2011-03-12 17:58:34
Last year our team used a different expoy to mount the propeller shafts (prop adapters) to the motors.  We used a marine expoy from Home Depot:

http://www.homedepot.com/h_d1/N-5yc1v/R-100371825/h_d2/ProductDisplay?langId=-1&storeId=10051&catalogId=10053

So far it has held up quite well and continues to work even a year later!

I like that better than the solder method as it is safer, and the kids and mix the epoxy.  I wouldn't let the kids do the soldering iron method (I'm too cautious).

-jim



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