Go to Post Like a moth to a flame, true FIRSTers are attracted by the Victor instead of the Banner. - Rich Wong [more]
Home
Go Back   Chief Delphi > Technical > Electrical
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #5   Spotlight this post!  
Unread 11-02-2016, 12:46
JesseK's Avatar
JesseK JesseK is offline
Expert Flybot Crasher
FRC #1885 (ILITE)
Team Role: Mentor
 
Join Date: Mar 2007
Rookie Year: 2005
Location: Reston, VA
Posts: 3,625
JesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond repute
Re: VersaPlanetary Integrated Encoder - Where should it go?

As another reference point:

The configuration on our turret is [BAG -> 10:1 -> 10:1 -> 4:1 -> VP Encoder -> 18:42 chain]. This is technically out of spec by a smidge but after careful consideration of the full system setup I believe it will work fine. The turret uses the really nice, sturdy Igus slew ring that prevents 'racking'. It doesn't require much torque to turn and at full motor power should only be about 4% of the maximum load rating for any of the failure conditions listed in the VP load rating guide (2.1 N-m at the hex output shaft + 100% safety margin). We went for higher precision in control since it only has a 75-90 degree FOV. In reality I don't believe the turret will ever receive full motor power - probably more like 75% while it resets to center. The thing seriously takes some oomph to turn by hand for manual alignment...

Conversely, the configuration on our tilt is [BAG -> 10:1 -> 10:1 -> Encoder -> 3:1] since the load for the tilt is a bit higher of a load, at about 50% of the load rating of the failure conditions at the worst point (including 100% safety margin). It may see full power when angling backwards, so we'll remain strictly within the BAG->VP "Green" zones in the guide.
__________________

Drive Coach, 1885 (2007-present)
CAD Library Updated 5/1/16 - 2016 Curie/Carver Industrial Design Winner
GitHub

Last edited by JesseK : 11-02-2016 at 13:12.
 


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 02:52.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi