Chief Delphi - [FRC Blog] Questions That Need Answering

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- - [FRC Blog] Questions That Need Answering (http://www.chiefdelphi.com/forums/showthread.php?t=153601)

Caleb Sykes

13-01-2017 23:24

Re: [FRC Blog] Questions That Need Answering

Quote:

Originally Posted by mrnoble (Post 1630897)

I'm still fairly confident that <50% of teams will have a reliable and working climbing mechanism in competition, Velcro or no. I'm also confident that no team will get past quals without one.

I am confident that at least 1 team will get past quals without one.

mrnoble

13-01-2017 23:37

Re: [FRC Blog] Questions That Need Answering

Probably you're right. But not many.

scca229

14-01-2017 09:06

Re: [FRC Blog] Questions That Need Answering

Quote:

Originally Posted by Bkeeneykid (Post 1630816)

Welcome to the 2018 FIRST Robotics Competition, and the game: Water Game. Teams must bring their own water. Water must consist of a low viscosity and at it's maximum width must not be larger than 12 in.

But can I use this in my water?

prensing

14-01-2017 10:42

Re: [FRC Blog] Questions That Need Answering

What is still not clear to me is whether there is plain "velcro" strapping that can hold 130+ lbs. If not, it is not clear is sewing velcro onto a nylon strap would be legal.

engunneer

14-01-2017 13:30

Re: [FRC Blog] Questions That Need Answering

Quote:

Originally Posted by prensing (Post 1631037)

What is still not clear to me is whether there is plain "velcro" strapping that can hold 130+ lbs. If not, it is not clear is sewing velcro onto a nylon strap would be legal.

The rope does not need to be constructed of a uniform material. The material used do not need to be the full length of the rope.

efoote868

14-01-2017 13:37

Re: [FRC Blog] Questions That Need Answering

Quote:

Originally Posted by prensing (Post 1631037)

What is still not clear to me is whether there is plain "velcro" strapping that can hold 130+ lbs. If not, it is not clear is sewing velcro onto a nylon strap would be legal.

If you don't want to make the argument that sewing isn't a form of weaving, can you not think of a way to braid or weave or knot it into/onto a strap?

ginger3.14

14-01-2017 14:32

Re: [FRC Blog] Questions That Need Answering

The Velcro website uses the word woven in their product description.... https://www.velcro.com/business/products/textile-hook-and-loop My team is going to use this as justification if necessary.

cbale2000

14-01-2017 14:49

Re: [FRC Blog] Questions That Need Answering

So am I the only one who even after this blog post and Team Update 2 still cannot tell if and under what circumstances velcro is legal to use on a rope? :confused:

bobbysq

14-01-2017 17:01

Re: [FRC Blog] Questions That Need Answering

Quote:

Originally Posted by cbale2000 (Post 1631157)

So am I the only one who even after this blog post and Team Update 2 still cannot tell if and under what circumstances velcro is legal to use on a rope? :confused:

It must be loop side
It must not have adhesive on the back
It must follow the rest of rope rules

ollien

14-01-2017 17:16

Re: [FRC Blog] Questions That Need Answering

Quote:

Originally Posted by bobbysq (Post 1631220)

It must be loop side
It must not have adhesive on the back
It must follow the rest of rope rules

Would it be legal to sew some Velcro onto the rope that is hook on the inside and loop on the outside? Might we have to file off the hooks?

apm4242

14-01-2017 17:39

Re: [FRC Blog] Questions That Need Answering

1 Attachment(s)

Quote:

Originally Posted by bobbysq (Post 1631220)

It must be loop side

Hooks might be ok, too. According to this, the hooks on 3M's hook and loop with a plain back (no adhesive) are made from woven nylon or woven polyester. Product numbers SJ3401, SJ3402, SJ3476, SJ3477.

Snap shot attached if you don't want to go to the pdf.

Basel A

14-01-2017 18:06

Re: [FRC Blog] Questions That Need Answering

Quote:

Originally Posted by ollien (Post 1631228)

Would it be legal to sew some Velcro onto the rope that is hook on the inside and loop on the outside? Might we have to file off the hooks?

Why wouldn't you just buy plain-backed? Pretty cheap on McMaster: https://www.mcmaster.com/#hook-and-loop-fasteners

ollien

14-01-2017 18:13

Re: [FRC Blog] Questions That Need Answering

Quote:

Originally Posted by Basel A (Post 1631243)

Why wouldn't you just buy plain-backed? Pretty cheap on McMaster: https://www.mcmaster.com/#hook-and-loop-fasteners

Because I couldn't find any :) Didn't even think to check McMaster. Ordering now.

bdaroz

14-01-2017 18:16

Re: [FRC Blog] Questions That Need Answering

Quote:

Originally Posted by ollien (Post 1631244)

Because I couldn't find any :) Didn't even think to check McMaster. Ordering now.

In our rookie team last year we wondered around kickoff why everyone was making jokes about the McMaster catalog.

We get it now. :D

Lil' Lavery

14-01-2017 19:00

Re: [FRC Blog] Questions That Need Answering

Quote:

Originally Posted by efoote868 (Post 1631125)

If you don't want to make the argument that sewing isn't a form of weaving, can you not think of a way to braid or weave or knot it into/onto a strap?

We spent some significant time prototyping weaving velcro into our rope today. Our best results came with using string to tie the velcro, however we have concerns that it may be interpreted as "whipping," which is specifically only allowed for preventing fray.

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