We prototype using PVC with wood plugs in the ends and 1/4 20 bolts sticking out long enough to put electric hand-drills on for proto-power...
On production, we use hollow aluminum tube with Nylon plugs in the ends and we press aluminum shafts in, spinning on lubricant-infused bushings.. I think going forward we'll skip the bushings and use sealed-bearings if weight/cost isn't an issue.
As for keeping Polycords in-place... we abide by the 148 Robowranglers credo... "IF gum-rubber isn't the answer, THEN you're asking the wrong question..."
LOL
SERIOUSLY, the black gum-rubber works _great_ creating channels and looks _awesome_!! < some scrolling pictures
www.broncbotz.com > You need to apply at least TWO layers and super-glue each layer...
From McMaster:
4568T18 Architectural Anodized Aluminum (alloy 6063), Tube, .065" Wall Thk, 1-1/2" Od, 1.370" Id, 6' L
93625K58 Natural Gum Foam, Adhesive-backed, 1/8" Thick, 1-1/2" Width, 50' L
8541K56 3 Ft. Wear-resistant Black Nylon Rod, 1-3/8" Diameter
__________________
"Retired Insurance Guy"
Link to me on this new fangled-thingy called The Linkedin and help make me popular, or at least appear to be... ;-)
https://www.linkedin.com/in/wmichael...ve_tab_profile
- Head Coach / Founder - FRC 6370 Texas Titans < FRC and VEX teams under development - VRC 15842a >
- President / Founder - San Antonio Competition Robotics Alliance - SACRA 501(c)(3) nonprofit (2012-present)
- Executive Director - Sports-Competition Robotics of Texas Excellence - SCRATE (2016-present)
- Former-Head Coach / Founder - FRC 3481 - Bronc Botz (2011-2016) // C++ Beta Test Team (2012 to 2016)
- Former-Lead Coach (2013-2016) Former-Head Coach (2009-2012) / Co-Founder - FTC 4008 - Bronc Botz (2009-2016) and FTC 4602 - Bronc Botz (2011-2016) and FTC 6976 - Bronc Botz-Nano for middle-schoolers (2013-2016)
- Co-Founder w/Matt Blake - VEX VRC 3481z - Wonder Botz (2011) [for Physically or Mentally Challenged Teens] (2011-2012)