Re: 1726 Beginning Week Three
 

We are doing a very similar design to yours except I think our shooter will be placed different from yours. I was just wondering if you were planning on controlling the speed of the shooter to adjust to various distances.

Looks GREAT!!

-Mike

Re: 1726 Beginning Week Three
 

Kevin (programmer) says "yes! We're planning on using the camera or an ultrasonic sensor to determine distance and adjust the shooter speed accordingly. Human control of the speed shows distance is controllable"

(he was in the kitchen eating cereal....so I asked him....)

Re: 1726 Beginning Week Three
 

This is the major thing we are worried about and unfortunately don't have a great way to test before committing to a design.

Have you tested the effectiveness of altering the distance by changing wheel speed? If so, was spin up/spin down time a factor?

Re: 1726 Beginning Week Three
 

We didn't have much time to mess with it tonight (got it firing just before it was time to close the shop :( ) but we can test this tomorrow and see how effective motor speed is on distance. The roller is spinning at 3700 rpm from one CIM on a 5" roller and 1.5" compression, so spin up time might be a little higher than we expected, but once again, we'll test that tomorrow ;)

Re: 1726 Beginning Week Three
 

Oh okay that's what we are looking forward to also we got the camera tracking the colors and following them but we have not had a chance to test the ability of judging distance. We are going to using 5" rollers as well but we are running a CIM at a 2:1 so we are more in the range of 2600 rpm. Hopefully we can get the shooter up the rest of the way tomorrow to be able to test distance by Wednesday......

-Mike

Re: 1726 Beginning Week Three
 

Our previous test of the shooter was at about 2200 rpm (9 tooth motor sprocket, 22 tooth roller sprocket). Tonight's test was at about 3700 (15 tooth motor sprocket).

Re: 1726 Beginning Week Three
 

I was doing a quick gear box just using a 12 tooth spur gear on the motor to a 24 tooth spur gear on the output. Now that I seen that I might have the kids test a shooter with the higher range......... did you guys happen to measure how much extra distance was coming out of that extra 1500 rpm?

-Mike

Re: 1726 Beginning Week Three
 

i saw the banebots gearbox on what appears to be the banebots 545 motor...is this correct? If so, why did you choose this motor for this application, and if you guys can, or have, what did you get as the output RPM of that planetary? Thanks a lot...looks great!

Re: 1726 Beginning Week Three
 

This is great COTS engineering for a turret! What kind of support bearings are you using?

How much weight do you think your turret can handle ?

Re: 1726 Beginning Week Three
 

This is the new 2009 KOP Banebots RS-545 motor, installed on the old 2007 KOP Banebots 64:1 36mm planetary transmission. That transmission is still for sale from Banebots, and although it is sold with an RS-540 motor, it's easy to swap the motors if you have a new pinion gear (we bought several pinion gears and an extra transmission in 2007 because we thought we might use the transmission then, but did not).

Re: 1726 Beginning Week Three
 

Right now it has some of those funky grooved bearings from a previous KOP, which are desinged to be used on metal slides. We ordered some of the new KOP wheel bearings, which should fit in place of the funky ones. See our 2009 Build photo gallery on the NERDS web page for more detailed photos.

I don't know how much weight it can handle...but it's handling about 12 lbs right now, and seems to be pretty sturdy. I dontk now how it would fare against a direct hit from something during a match...we'll have to think about that. If the robot fell over, it could be damaged.

Re: 1726 Beginning Week Three
 

We were looking at using the same exact planetary with that motor, however using it in a different application than a turret....thats why I was asking for the output RPM....thanks for the info though!