Quote:
Originally Posted by asid61
I assume you know how both of these work?
Anyways, ball shifters require less force to shift but one of our mentors doesn't like them, as they wear out in industrial applications. But for FRC, wear is not really a problem with them I hear. The Vexpro ballshifter is lighter than the WCP shifter.
Open shifters are probably not going to die ue to carpet grime as long as you wipe them off after a regional.
We used a ballshifter this year to winch back out catapult (several hundred pound of force) and the only thing we had to modify was to beef up the pneumatic cylinder so that it would have enough force to shift.
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We were planning on using them for the drive train so I don't think that would be a problem for us.
Quote:
Originally Posted by nathannfm
MOE used the 3 CIM ball shifters this year and we experenced significant wear on the aluminium shifting shaft. I heard a few other teams experienced this on their winches but this was on our drive, enough that the most worn one was unable to shift. We also had some of the miniature ball bearings fail, possibly related to this. We never did get to the bottom of the problem (possibly user error related to the pneumatic coupler) but I have to stress that VexPro and JVN were extremely helpful and generous when we told them of the problems we were having. I also believe it was mentioned that this component would soon be replaced with a steel version which I know some teams already took it upon themselves to manufacture. If you are looking to purchase gearboxes in preparation for 2015 I would wait and see if VexPro has another product unveil in mid December like they have had the last 2 years. You don't want to be stuck with "last years model" if they come out with something better. |
So those are from shifting pneumatically? Last year we waited too long and were stuck with Toughbox Minis. It is in our best interest to order these gearboxes and test them well before the build season