We are using the Robotics system to design a robot that willcompete in a race. W

Question

We are using the Robotics system to design a robot that willcompete in a race. We have just started using vex and are not veryfamiliar with gear ratios and how they work. We would like aconfiguration that would be stable yet fast. I will post the partsthat we have. If someone could suggest a gear configuration thatmight work well and explain why it would be greatly appreciated.Feel free to pm me if you need for info. There is no sizelimitation on the robot, but we would like to keep it relativelysmall.
Material Type: Derlin
Gear Type: Spur
Diametral Pitch: 24
Pressure Angle: 20 Degrees
Face Width: 0.250" (6.35mm)
Size:

• 12-tooth gears:0.5" (12.7mm) PitchDiameter
• 36-tooth gears:1.5" (38.1mm) PitchDiameter
• 60-tooth gears:2.5" (63.5mm) PitchDiameter
• 84-tooth gears:3.5" (88.9mm) PitchDiameter

ApproximateFailure:

• 12-tooth, 40 in*lbs
• 36-tooth, 120 in*lbs
• 60-tooth, 200 in*lb

Motor Info:

• Free Speed:100 rpm @ 7.5volts
• Stall Torque:6.5in-lbs
• Voltage:4.4 - 9.1 Volts (Motorlife will be reduced operating outside this range)
• PWM Input:1ms - 2ms will give fullreverse to full forward, 1.5ms is neutral
• Dead Band:1.47ms -1.55m
• Black Wire:Ground
• Orange Wire:Power
• White Wire:PWM signal

Material Type: Derlin
Gear Type: Spur
Diametral Pitch: 24
Pressure Angle: 20 Degrees
Face Width: 0.250" (6.35mm)
Size:

• 12-tooth gears:0.5" (12.7mm) PitchDiameter
• 36-tooth gears:1.5" (38.1mm) PitchDiameter
• 60-tooth gears:2.5" (63.5mm) PitchDiameter
• 84-tooth gears:3.5" (88.9mm) PitchDiameter

ApproximateFailure:

• 12-tooth, 40 in*lbs
• 36-tooth, 120 in*lbs
• 60-tooth, 200 in*lb

Motor Info:

• Free Speed:100 rpm @ 7.5volts
• Stall Torque:6.5in-lbs
• Voltage:4.4 - 9.1 Volts (Motorlife will be reduced operating outside this range)
• PWM Input:1ms - 2ms will give fullreverse to full forward, 1.5ms is neutral
• Dead Band:1.47ms -1.55m
• Black Wire:Ground
• Orange Wire:Power
• White Wire:PWM signal

ApproximateFailure:

• 12-tooth, 40 in*lbs
• 36-tooth, 120 in*lbs
• 60-tooth, 200 in*lb

Motor Info:

• Free Speed:100 rpm @ 7.5volts
• Stall Torque:6.5in-lbs
• Voltage:4.4 - 9.1 Volts (Motorlife will be reduced operating outside this range)
• PWM Input:1ms - 2ms will give fullreverse to full forward, 1.5ms is neutral
• Dead Band:1.47ms -1.55m
• Black Wire:Ground
• Orange Wire:Power
• White Wire:PWM signal

Explanation / Answer

What is the size of the motor and how fast do you want the robot to go?

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