Kitbot/cims/transmissions running too slow?

[Projectchon]

i'm not a pro, but this is what i'm going to say:
Temperature maybe is a small facter, but i think is the Voltage.
Did you change the pin inside the gearbox?

[Steve P]

Originally Posted by jimfortytwo

2003: two 1/2" drill motors in high
38% 10.5ft/s real, 27ft/sec projected
(resulted in intermittent breaker and controller resets!! )

Dear god, you wanted 27 feet a second? I thought 11fps was absolutely insane.

[Evan Austin]

What is the gear reduction ratio of the kit transmission for the chippewa motors? Are you running four chippewa motors for drive or just two? I don't have any numbers for it but our 2004 bot with two chippewa motor drive, 12 inch wheelchair wheels and about 29:1 final drive ratio would absolutely FLY!
I will agree with you, your problem has me stumped too. Since your driveline feels smooth and you have already ruled out voltage problems, I don't see why it would give you problems. As for having defective motors, it is highly unlikely that you would wind up with two lemons in the same kit. Good luck, Swampdude!

[JVN]

Originally Posted by Max Lobovsky

CIMs are 5500 rpm no load according to the spec sheet. No load means no load. Wheels, a gearbox, chains, etc, are a load.

Even under a normal driving load, those speeds wouldn't make any sense.
Assuming you don't have a MAJOR parasitic load somewhere (which you probably don't) this is totally crazy.

Dan, please check your voltage and get back to us.

My prediction, you're not giving those CIMs full power.

JV

[Kit Gerhart]

Originally Posted by Swampdude

We had our kitbot running today and did a speed test.
Our configuration was using 6" wheels.
also used the 21 tooth for the counter shaft
and the 28 tooth for the wheels
we measured it's speed to be 5'/sec

If you figure those cims are running at 5300 free speed
reduced 12.75:1 (gear) and 1.333:1 (sprocket)
we should have been moving 8.15'/sec

I assume you've check this, but make sure you're getting full power. The led's on the speed controls should be green in full "forward" and red in full "reverse." If they're not, recalibrate your speed controls.