Please help - launcher issues.

[teh_lol]

It seems that using the FIRST wheels is problematic, since they do not compress. This would distort the frisbee slightly when going through the shooter. Next the linear design can also be imparting only a little of the momentum, since the frisbee will only be given momentum from the wheel at a single point.

[ehochstein]

This thread may help

http://www.chiefdelphi.com/forums/sh...hreadid=111336

[ksafin]

Thanks for the feedback guys. To address a few questions:

We are indeed using CIM Motors.

We are not doing a reduction or 1:1, both gearboxes are geared up; 1:2.375 and 1:2.

We'll try 1:1 tomorrow and try to put on pneumatic tires. We have them, but it's been challenging to get the hub on them to stay straight and not have them wobble on the shaft.

[Mk.32]

Originally Posted by ksafin

Thanks for the feedback guys. To address a few questions:

We are indeed using CIM Motors.

We are not doing a reduction or 1:1, both gearboxes are geared up; 1:2.375 and 1:2.

We'll try 1:1 tomorrow and try to put on pneumatic tires. We have them, but it's been challenging to get the hub on them to stay straight and not have them wobble on the shaft.

You maybe spinning the wheel TO FAST. Causing slip between the wheel and the disk, which would decrease performance. Try adding a victor and running at slower speeds.

[vinnie]

This may or may not be your problem, but it was our problem.

Make sure you test with the official FIRST discs. We got a bunch of generic frisbees to test with ad we were really disappointed with the horrible distance (about 5 feet) that the discs were flying. Then I tried loading in one of the FIRST frisbees and those flew over 50 feet.

Most likely one of the previous posters already identified your problem, I just thought I'd post this here just in case it could be helpful to you or someone else.

[dellagd]

Use pneumatic wheels!!!!!

[Kusha]

Try different wheels, not necessarily pneumatic but try KOP wheels etc. Put more compression on the frisbee.

[Jay O'Donnell]

Originally Posted by dellagd

Use pneumatic wheels!!!!!

Agreed, or go for something with more grip, like some plactions ( what our team is using for a prototype)

[DonRotolo]

Originally Posted by ksafin

both gearboxes are geared up; 1:2.375 and 1:2.

Absolutely too fast. Try 1:1 and 80% speed (~10 V), at least on the first wheel.

[thedude019]

slipping is a problem with those wheels we made a arc shooter with just a single wheel the wheel was directly connected to a CIM. when the frisbee went through it scuffed the frisbee and the wheel was shedding thin rubber strips. a wheel with better traction and a a wall that is slippery should work fine don't use a placation wheel as the tread around it will fly off and possibly hit someone like that almost happened to us

[Ether]

Originally Posted by thedude019

a wall that is slippery should work fine

You don't want a slippery wall.

If the bee slips on the wall, you won't get the spin you need for accurate and consistent shooting.