pic: Team 148 - 2011 - Raptor

[Adam Freeman]

Originally Posted by jwfoss

The adjustable length four bar link is a really slick trick. I've had that sketched out in my engineering notebook since the first time I ever saw that done back in 2008 at FLR. They had an adjustable lower link to stay within the sizing rules and to tilt the gripper up, whereas you adjust your upperlink to actuate your wrist. Also I believe theirs may have been passive (gas shock) where your is pnuematically adjusted.

FRC67 - HOT from 2008
http://www.chiefdelphi.com/media/photos/30680

Unfortunately our 2008 adjustable lower link design never made it passed our practice field. The mechanical implementation on that design (PVC and gas shocks) had a serious transition phase that caused our programmers fits. We ended up re-designing the lower arm and replacing it with a solid link as soon as it came out of the crate Thursday morning @ FLR.

Raptor's adjustable arm is much more elegant and functional than that HOT '08 adjustable arm ever dreamed of being.