Re: CIM Motor Sacrifice
 

Where can you purchase a CIMulator gearbox? Banebots has something called a cimulator, but it says it only mounts to one RS775.

Re: CIM Motor Sacrifice
 

We were discussing that today as well. We're gonna probably be doing what it seems everyone else has been saying: try out the FP motors with CIM gearboxes. The build crew pointed out that for the shooter you don't really need the CIM's torque, more just their speed, so the FP be ok.

Re: CIM Motor Sacrifice
 

AM Planetary Gearbox (am-0002)

Re: CIM Motor Sacrifice
 

Check AndyMark for the Cim-Sim gearbox, $89 each. I also found an adapter to adapt the 8mm keyed output shaft to a 1/2" hex for $10.

http://www.andymark.com/product-p/am-0932.htm

http://www.andymark.com/product-p/am-0588.htm

Hope this helps.

Re: CIM Motor Sacrifice
 

This is why Fisher Price gearboxes are so awesome. It is a plastic case with plastic gears and it already has both 500 AND 700 size motor compatible mounting holes. The downside is that you have to find the pinion or take the pinion provided on the FP in the KOP and bore it out to fit the 775. Also, the output could be an issue. That being said, it worked brilliantly on our 2011 robot.

Re: CIM Motor Sacrifice
 

PROTIP: I didn't see anything in the Robot Rules about springs. So a spring powered mechanism may eliminate the need for a motor.

Re: CIM Motor Sacrifice
 

Well, I'm not building a robot this year, but in 2006 one FP worked okay.

http://www.youtube.com/watch?v=jggKd...fOxsD6WqKj3HO_

Looking back, our original intent was to have a second FP on the other side of the turret, so the shooter would run off 2 FP's. This would have been good as far as getting our shot rate up, but would have also meant that we would have violated the maximum ball velocity rule that was in place that year... we weren't sufficiently skilled at sensors and software at that point to have a constant-speed closed-loop feedback system on the shooter motor(s).

While the full pan/tilt turret looks really good, and we could hit from half court, and this became our #1 demo robot for years, we got whupped by teams with simpler mechanisms who could aim and shoot more balls from closer range.... and that was with a much larger target to aim at.

I don't know how much more energy the larger balls this year will require, but I suspect 2 CIMs will have more than enough energy to hit the target from wherever you choose to shoot.

Jason

Re: CIM Motor Sacrifice
 

That seems like a lot of gears to go through between your motor(s) and your shooter; you'll loose a lot of efficiency that way. You may want to just skip the CIMple box and go directly from CIMilator to shooter. My team tested direct-driving CIMs on our prototype shooter and it worked great.

As for the Fisher Price gearbox, the AndyMark planetary gearbox (am-0002) is really easy and works well. It's just like a CIMulator from BaneBots, although we've never used a BB CIMulator on one of our 'bots.

Re: CIM Motor Sacrifice
 

Do you plan on doubling up on that set up? As in 2 or 4 motors driving 4 wheels? If you only have 2 wheels, there won't be enough points of contact to ensure a consistent shot, unless you guide the ball to the same spot each time.

Also, going from a CIMulator to a CIMple box seems like a lot of work. You can change the gear ratio of a gearbox to better match your needs. However, I doubt you'll need to do that since the CIMulator is designed to give similar performance to a CIM. A standard CIM has plenty of speed and torque to launch a ball.

Re: CIM Motor Sacrifice
 

As a 500 series motor, a fisher price (or 2) should fit nicely into a CIMulator, which are nice because they are cheap.

Off of a banebots or fisher price (at about 16000 rpm) you will want something in the ballpark of a 7:1 reduction from motor to 4" wheel. For an 8" wheel, 14:1, and the extrapolation is easy.

Re: CIM Motor Sacrifice
 

The only reason that we wanted the CIMple box is to combine two motors and have one output shaft (if needed). We plan on testing our prototype shooter today with a CIM (maybe 2) through the CIMple box. Is there a simpler way to do this?
As for the amount of wheels, will will find out today in our test.

Re: CIM Motor Sacrifice
 

We're using Nanotube transmissions/drives so we're using CIMs for our shooter. I would rather have to step the motors down than get into a match and our shooter need some extra juice or burn out because we skimped on the motors. Just one person's opinion...worth a warm bucket of spit! :eek:

Re: CIM Motor Sacrifice
 

What is possible with a 2-FP shooter from 2006. Six (6) balls air-born at the same time. Needless to say we are building another 5-roller shooter. No need to sacrifice CIMs for it IMO.

Re: CIM Motor Sacrifice
 

Did you actually get 2 9013's in the Kit, or are you simply referring to the fact that the KoP lists 2 9013 motors?

http://www.chiefdelphi.com/forums/sh...41#post1104041

Re: CIM Motor Sacrifice
 

I only briefly looked at the FPs in the kit in person, and later looked at the Checklist, which is where I originally got the 9013. Today I looked through our motor stash, we have a heck of a lot of 9015s, as expected, one 00673 from last year, and two rather old looking 9012s, probably from 2007? (our rookie year) I didn't get around to looking at what the number on the new ones was (they were hidden in a kit box somewhere and there were more pressing things at hand), so I will likely check that out tomorrow.

Edit: checked the 2007 KoP checklist (hadn't done that yet) and there were two 9012s (with gearboxes) in the 2007 kit (according to that document).