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blackrocks0
11-02-2012, 14:40
We have been using 2 FP motors with planetary gearboxes for our shooter, but they don't seem to have enough power. (they've been giving off an odd smell when we run them for ~1-2min). Are there any other durable motors that can run <3000rpm like CIMs can?
jason701802
11-02-2012, 15:03
Which FP are you using? The powers for various 550 motors are as follows

FP-0673 291.6W
FP-9012 172.8W
FP-9013 209.3W
FP-9015 185.0W
AM-0912 180.8W
BB-RS550 253.5W

Switching to the FP-0673 (if you can find some) or the BaneBots RS550 might be all you need to do. All of these motors have a free speed of 15k-20k RPM, the free speed of the CIM is 5310RPM.
Source: http://www.usfirst.org/sites/default/files/MotorInfo4.1.pdf
Ether
11-02-2012, 15:03
We have been using 2 FP motors with planetary gearboxes for our shooter, but they don't seem to have enough power. (they've been giving off an odd smell when we run them for ~1-2min). Are there any other durable motors that can run <3000rpm like CIMs can?

What is the part number of the FP motors you've been using?

What is the gear ratio of the planetary gearboxes you've been using?

Is there any additional gear reduction between the gearbox output shaft and the wheel (such as gears or chains or belts)

Is this a bottom-only design with both motors powering the same wheel, or do you have a top wheel and a bottom wheel, each powered by one motor?

What voltage are you applying to the motors (i.e. are you driving this at full applied voltage or a reduced voltage)?

At how fast are the wheel(s) spinning?
Arjun
11-02-2012, 16:07
What is the part number of the FP motors you've been using?

What is the gear ratio of the planetary gearboxes you've been using?

Is there any additional gear reduction between the gearbox output shaft and the wheel (such as gears or chains or belts)

Is this a bottom-only design with both motors powering the same wheel, or do you have a top wheel and a bottom wheel, each powered by one motor?

What voltage are you applying to the motors (i.e. are you driving this at full applied voltage or a reduced voltage)?

At how fast are the wheel(s) spinning?


I am on blackrock0's team.

The FP motors we are using are the 9015 FP motors

The gear ratio is 3.67.1

There is a 2:1 gear ratio from the motor to the wheels using belts

This design has two spinning wheels, top and bottom. There are two separate FP motors running the wheels.

As of right now, we are running full applied voltage.
Ether
11-02-2012, 17:54
I am on blackrock0's team.

The FP motors we are using are the 9015 FP motors

The gear ratio is 3.67.1

There is a 2:1 gear ratio from the motor to the wheels using belts

This design has two spinning wheels, top and bottom. There are two separate FP motors running the wheels.

As of right now, we are running full applied voltage.

When you are running at full voltage, how fast are the wheels spinning? Or, how much current is each motor drawing? This is the data needed to estimate the operating point on the motor curve, so your question can be answered properly.

Also, are your motors properly vented? i.e, are the air vents unblocked?

Without the above answers, my guess would be either:

1) Spinning the belts at that high speed is placing a load on the motors that they cannot continuously sustain, or

2) The motors are not properly vented.
blackrocks0
11-02-2012, 18:57
The motors ran at 3600 rpm when we shot our balls. The motors still have that metal sleeve covering part of them, but i think that we're not covering any
ventilation.
Ether
11-02-2012, 19:16
The motors ran at 3600 rpm when we shot our balls.

Something doesn't add up.

FP 9015 has a free speed of 15,600 rpm.

You said you had 3.67:1 reduction followed by 2:1 reduction.

15,600/3.67 is 4251 rpm, and 4251/2 = 2125 rpm