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-   -   Motors and gearboxes from the kit (http://www.chiefdelphi.com/forums/showthread.php?t=36002)

Biff 10-03-2005 16:42
Re: Motors and gearboxes from the kit
 
Quote:
Originally Posted by Tom Bishop
Sprockets are a great place to loose weight. We put eight 1" holes in each of our 4 48 tooth drive sprockets and lost about a pound each. Sprockets are hardened steel, and will be difficult to drill without a press or a mill. It might be that a team has a mobile shop at the regional that you could use. We also lost about a pound by drilling out the side holes of the kitbot frame to 7/16". You can do that with a hand drill and some good arm strength! Watch out though, the hand drill will tend to "grab" and torque the drill around, possibly smashing fingers against the table top. We used a 6" hole saw to drill out the top plate where we put the Robot controller. Any solid pieces of metal are good candidates for holing.

What regional are you attending? Maybe a team with a mobile shop can let you know if they will be at your regional and can help with what is likely to be a lot of work and reassembly, as well as other teams that could help. Good luck and I hope things turn out well for you. :)
There should be a First supplied machine shop in a trailer at the regionals Ask the First people where it's located, sometimes it's in an adjacent loading dock, sometimes it's outside, kind of depends on the space.

Kam1310 10-03-2005 17:24
Re: Motors and gearboxes from the kit
 
We are attending the Greater Toronto Area Regional in Canada, one of the biggest. Our robot is 4 wheel drive and hour whhels are 2 1/2" this and 9" in diameter. We are not using any side plates and our robot base is made of extruded aluminum (don't really know the right spelling). Were planning on drilling holes in our arm which is 15 pounds it self. We haven't been to a regional yet but our team was wondering how much robot contact is there( any pushing or shoving).

Kam1310 10-03-2005 17:26
Re: Motors and gearboxes from the kit
 
Quote:
Our robot is 4 wheel drive and hour whhels are 2 1/2" this and 9" in diameter
I meant to say our robot is 4 wheel drive and the wheels are 2 1/2" thick and 9" in diameter

ahecht 10-03-2005 17:36
Re: Motors and gearboxes from the kit
 
Be aware that one of the bearings in the kit transmission is held in by the two CIMs. If you remove a CIM, you will need to find some way to secure it.

jdiwnab 10-03-2005 20:58
Re: Motors and gearboxes from the kit
 
Quote:
Originally Posted by ahecht
Be aware that one of the bearings in the kit transmission is held in my the two CIMs. If you remove a CIM, you will need to find some way to secure it.
:confused: What bearing would that be. We had to take apart our transmissions at the compition and, due to time, had to run on 1 motor each for a match. There is a bearing for each CIM. Then there is one for each side of the first driven gear shaft and then one for each side of the second driven gear shaft. If you remove a CIM, it can keep it's bearing, becuase it isn't needed (nothing moving there). Am I missing somthing?

Manoel 10-03-2005 21:20
Re: Motors and gearboxes from the kit
 
Quote:
Originally Posted by jdiwnab
:confused: What bearing would that be. We had to take apart our transmissions at the compition and, due to time, had to run on 1 motor each for a match. There is a bearing for each CIM. Then there is one for each side of the first driven gear shaft and then one for each side of the second driven gear shaft. If you remove a CIM, it can keep it's bearing, becuase it isn't needed (nothing moving there). Am I missing somthing?
First, there are no bearings for the CIMs (well, internally there are :p). It's the one supporting the first shaft (with the 50 T and 14 T gears).

Paul Copioli 10-03-2005 22:26
Re: Motors and gearboxes from the kit
 
People,

Read the manual!! It is on the ifirobotics.com website. There is a section that clearly indicates what you must do if there is one motor. And yes, you must retain the bearings where the CIM motor is now removed. Holes are already located in the motor plate, you just have to buy some screws, nuts, and washers. Please read the manual, not doing so may be hazardous to your transmission.

Also, there should be no noise difference between one and two motors. If there is, than something else is wrong (probably didn't retain the bearings no longer held in by the removed CIM).

-Paul


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