Quote:
Originally Posted by JesseK
VEXPro -
Single Speed: The single-speed double-reduction looks like it will work for WCD as-is, yet I have some reservations about longevity. There are effectively about 5.5 lbs cantilevered off of 2 mount points through plastic housing. I'd trust such a setup for a single competition. Yet I have reservations for so many matches between March 1 and November 31 in a game like 2016 (with considerations for transporting the robot so many times). It would require additional support somewhere, either from adapter plates or a super structure. So IMO it's not quite plug-and-play in WCD. My team could easily get it done, but I'm not sure for a typical team.
There also seemed to be a very large sensitivity to assembly tolerances on the VP Ball Shifter. I heard of multiple teams who had gear teeth sheer on the 3rd stage due to slight misalignments, and one such team was our alliance partner in the Finals at their 2nd event. It was something manageable, but I know my team would have to consider how rough the game is on drive trains before purchasing ball shifters.
These are, of course, my perspective based upon what I know about my teams strengths and weaknesses.
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We've used VEXpro for 3 years now, and it relatively pretty easy to do WCD. We use
bearing blocks, and all you have to do is turn the middle one upside down to get the required drop. This year we used this system, and the
triple cim ball shifter and it worked like a charm. We supported the gearboxes by having a crossbar over the gearboxes and screwing into the mounting points on top of the plastic housing. Never snapped a chain, and just generally never had problems with the drivetrain at all this year. And we were definitely one of the more "violent" bots while crossing defenses.