Chief Delphi - How to attach a metal hook to a timing belt.

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- - How to attach a metal hook to a timing belt. (http://www.chiefdelphi.com/forums/showthread.php?t=111067)

Re: How to attach a metal hook to a timing belt.

Quote:

Originally Posted by Jeffy (Post 1214455)

+1. Or I found a glue called "E6000". I think it might have a bit more strength, but stays flexible too.

Here is the link for the glue and thank you http://www.michaels.com/E-6000%C2%AE...efault,pd.html

Quote:

Originally Posted by MrBasse (Post 1214456)

If you still like belts, what's stopping you from grooving the pulley to allow a fastener to pass through? All it takes is a lathe and a little patience. You shouldn't need the full width of the pulley to grip the belt if it is just lifting the weight of a frisbee.

that is true, however I want a system to be simple, easy to make and easy to repair if it breaks.

Re: How to attach a metal hook to a timing belt.

Quote:

Originally Posted by mdiradoorian (Post 1214496)

that is true, however I want a system to be simple, easy to make and easy to repair if it breaks.

What isn't simple to make? If you have access to a lathe, simply chuck up a pulley and turn a groove. If you don't, a student can achieve the same results (although a little less pretty) with a file and some spare time.

What isn't simple to repair? You would effectively cut the teeth off the pulley in the center. So if you used a fastener with a .25 head on it, cut a quarter inch groove in the middle of the pulley teeth. The only thing that might fail would be a fastener and those are pretty easy to come by.

Re: How to attach a metal hook to a timing belt.

Oh by the way putting a fastener in the middle of a timing belt would increase the chances of of the belt breaking even if i were to make a groove in the middle of the pulley. The reason how I know is that I have tried. By having a belt you need tension and tension stretches to belt and when you stretch the belt with a hole in the middle of it increases the chances of it tearing.

Re: How to attach a metal hook to a timing belt.

A belt tearing is very dependent on the stress levels we are talking about. I'd hope hat there aren't a lot of forces involved in a frisbee conveyor, otherwise I would question the overall design.

Re: How to attach a metal hook to a timing belt.

An alternative to lathing a slot in the pulley would be to obtain a non-flanged pulley whose width is smaller than the belt width. You could then fasten the hooks to the edges of the belts. You would, however, have to consider how to keep the belt centered on that non-flanged pulley.

Re: How to attach a metal hook to a timing belt.

Quote:

Originally Posted by Jeffy (Post 1214455)

+1. Or I found a glue called "E6000". I think it might have a bit more strength, but stays flexible too.

I use E6000 at work. It has a little more strength then "Super Glue", but not much more.

Re: How to attach a metal hook to a timing belt.

Quote:

Originally Posted by Aroki (Post 1213943)

I would avoid floor pickup, (in my opinion at least) the advantage of being able to pick up from the floor is less than the difficulty of designing a mechanism that picks up and can also orient the frisbees, and the time spent doing that would be better spent making a good climber and/or a reliable shooter/loader robot. This also removes the need for a floor pickup to magazine mechanism

Silly silly silly. This paragraph is wrought with ill-conceived notions of this game.

A robot which sacrifices a complex hanger in lieu of a good autonomous which nets the 4 floor discs into the high goal is more valuable than a robot which sacrifices floor pickup for a 30-point hang. (24-pt auton from floor + 10-pt hang > 30-pt hang). That said, a 6-7 disc autonomous is just as hard (IMO) as a 30-point hang, and only one robot on an alliance is eligible to pickup 4 discs in a single auton. Yet the point is that there's a very good case for pickup from the floor for 2 robots on an alliance.

There's also good discussion about whether there will even BE any upside-down discs.

(edit -- sorry for the thread hijack -- the OP should keep trying with their floor pickup endeavors, IMO)