All right, I’ve read this section of the manual several times (and the rest of it twice, so don’t get on my back for not reading it…), and I’m wondering if I’m reading this right:
In section 5.3.4.2 (Additional Parts and Materials Rules), <R43>, the last bullet:
Teams may utilize one or two additional small CIM motors in addition to those provided in the kit of parts. This means that you may use up to four, and no more, small CIM motors on the robot.
In section 5.4.1 (2006 Kit Changes), the second bullet reads:
Removed two of the CIM motors and replaced them with two larger CIM “mini-bike” motors.
The first rule says that teams may use 4 smallCIM motors, and in the kit of parts teams are given two “larger” CIM motors. Does this mean that we can use 6 CIM motors total, 4 small and 2 large?
According to this revision of the rules, yes, unless they release a change within the next few weeks declaring that you can only use 4 CIMs at any one time.
The rule clearly states that only two small CIM’s were provided in the kit, but two more can be purchased.
The two large CIM’s are entirely separate from this verbiage.
Odds are the only reason there aren’t 4 CIM’s in the kit is to keep costs down.
[edit] the last line about two CIM’s being removed from the 2005 kit, and replaced with two larger ones only means exactly that-- IN THE KIT, there are only two small CIM’s, and two have been replaced. That doesn’t mean that you can only use two small ones total.
has anyone had a look at the new CIM motor (which I presume is the larger one) and to see if it is compatible with the stock gearbox :yikes:, at least in a single motor configuration.
Somewhere in the manual it says that the new motor is not directlty compatible with the transmission, but can be modified. I think it said something about contacting AndyMark.
You do realize that using all 6 at one time, even drawing only 35 amps each would be over 200 amps - which can’t be done with the batteries we use. This is one of the things they were talking about when they said we couldn’t possibly use everything.
Yes, but you could replicate this effect by running the standard 4 CIMs, and two FPs at once. It could happen. And you can draw over 200 amps through the battery for a short period of time. I don’t know how much over 200, but anyway, the 120 amp would break relatively quickly in said case.
But who the heck is going to run 6 CIMs at that current at the same time anyway? Please, no “HexaMax V2”…
When Dave made the comment at kickoff something to the effect that just because you were given (14) motors doesn’t mean you have to use them all, we started laughing. A couple years ago we used all but one, and we considered just putting it on as a counter weight
Even though the 2 new CIM’s are more powerful, we are usually traction or control limited and not power limited so I’v guessing we’ll use 4 smaller ones for our drive train to keep things common and use the other 2 for fun stuff.
“Upgrade Kit” for the FIRST Kit Transmission
purpose: integrates the Mini-Bike Motor into the Kit Transmission
includes: 28-tooth gear with “D” hole, new motor mounting plate, capture bar for Mini-Bike motor, and hardware
price: $28
“Gear Puller” for Mini-bike Pulley
Purpose: to remove the pulley for the Mini-Bike motor
includes: machined steel channel and 1/4" bolt
Price: $10
AM Shifter 2
purpose: fits a Mini-Bike Motor and a CIM Motor (or 2 CIM Motors) into a 2-speed shifting transmission
difference from AM Shifter: both side plates, cylinder mount bar, and added capture bar and 28-tooth gear with “D” hole
Price: $330
AM Gearbox
purpose: fits at Mini-Bike Motor and a CIM Motor (or 2 CIM Motors) into a reduction gearbox
Price: $98
The website will be updated soon to show these new offerings.
However… keep in mind that these motors may run faster or slower. I’ve seen this Mini-Bike Motor run over 2,700 rpms and the CIM motor run 5,500 rpms. Consider them to be +/- 10% of the rated speeds.
