View Single Post
  #5   Spotlight this post!  
Unread 07-11-2016, 21:46
asid61's Avatar
asid61 asid61 is offline
Registered User
AKA: Anand Rajamani
FRC #0115 (MVRT)
Team Role: Mechanical
 
Join Date: Jan 2014
Rookie Year: 2013
Location: Cupertino, CA
Posts: 2,215
asid61 has a reputation beyond reputeasid61 has a reputation beyond reputeasid61 has a reputation beyond reputeasid61 has a reputation beyond reputeasid61 has a reputation beyond reputeasid61 has a reputation beyond reputeasid61 has a reputation beyond reputeasid61 has a reputation beyond reputeasid61 has a reputation beyond reputeasid61 has a reputation beyond reputeasid61 has a reputation beyond repute
Re: Custom Gearboxes

If you want to use a custom box for this, I would recommend using a dual-input Versaplanetary stage to fit both 775pro motors, following by a 5:1 or 7:1 VP stage. At that point you only have to do a small 3:1 or 4:1 reduction to get close to what you want at the spool.
Fully custom gearboxes shouls be avoided IMO if you don't have CNC machining capability of some kind. You'll end up with a heavier, larger product. That being said, integrating a Versaplanetary with an extra output stage to a spool can be made very compact and with minimal machining tools.
Look into the JVN Mechanical Design calculator instead of making your own calculators. Link: https://www.chiefdelphi.com/media/papers/3188
The "linear mechanism" tab should have all you need, including projected current draw and other useful statistics.
__________________
<Now accepting CAD requests and commissions>


Last edited by asid61 : 07-11-2016 at 21:54.
Reply With Quote