Servo Selection
Servos generally fall into two categories: torque-focused or speed-focused. Torque servos prioritize force, allowing robots to handle heavier loads and maintain strong positioning, while speed servos focus on quick, responsive movement, ideal for applications requiring fast adjustments.
In FIRST Tech Challenge, the three commonly used servo brands are REV, GoBILDA, and Axon.
REV offers one servo, the Smart robot servo, a good price-to-performance servo. It features a dual mode, offers average output torque and speed, and has a brass gearbox.
Smart Robot Servo
Speed at 6 Volts
≈71 RPM
Torque at 6 Volts
13.5 kg·cm
Range of Rotation
270°
Price
$30.00
GoBilda servos are a good price-to-performance servo. They feature a dual mode, and offer higher than average output torque or output speed (depending on the gearbox), and a steel gearbox.
Torque Servo
Speed Servo
Super Speed Servo
Speed at 4.8 Volts
40 RPM
90 RPM
180 RPM
Torque at 4.8 Volts
17.2 kg·cm
7.9 kg·cm
4 kg·cm
Range of Rotation
300°
300°
300°
Price
$36.99
$36.99
$36.99
Axon servos are the best price-to-performance high-performance servos. They have a high efficiency and a high power output. In addition, these servos can track their absolute position via an analog output wire.
MICRO+
MINI+
MAX+
Speed at 4.8 Volts
≈118 RPM
≈91 RPM
≈71 RPM
Torque at 4.8 Volts
6.5 kg·cm
20 kg·cm
28 kg·cm
Range of Rotation
255°
255°
255°
Price
$69.99
$86.99
$89.99
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