Home  Sources  Part descriptions  Electrical parts  Mechanical parts  DC motors  Geared motors Gearmotors compared Nihon details Copal details Omron details Omron gearhead details Tokyo Micro details TS-53 / S3003 details CS-20bb details Microcassette details BIObug 143:1 details BIObug 177:1 details BIObug II 224:1 details  Stepper motors  Misc. parts Assembly descriptions   BEAM Pieces is a BEAM Reference Library site.		Tower Hobby's TS-53 / Futaba S3003 "hacked" servo detailed data The smallest little things that make up a BEAMbot Manufacturer Futaba, for Tower Hobbies (but many other comparable motors are available) Source Purchase from Tower Hobbies or Solarbotics; similar servos (manufactured by other companies) are available from Tower Hobbies, Hobby People, and other vendors catering to RC Aircraft builders. (image courtesy of Solarbotics) Comments Hobby servos need to be "hacked," in general, before they are used on a robot. This just consists of disconnecting and removing the internal circuit board, removing the intenal potentiometer (if possible; some servo models use the pot to hold gears in place), and often removing a motion stop on one of the internal gears -- see here for details. Note that hobby servos are designed to last just several hundred hours; while easily obtained, and not-too-expensive (as low as $10 US for a "standard" size servo), their short lifetime somewhat limits their usefulness. Thanks to their low Vstart, these are great for experimenting, but their relatively-short lifetime makes them a less-than-optimum choice for a 'bot you'll give as a gift. Meanwhile, they're not all that efficient, and very noisy (in an electrical sense). You'll definitely want to connect a capacitor in parallel to any servo you put on an Nv-net-driven bot. This page presents all the data from my testing of a single example of the Futaba S3003 (pull up the Tower Hobbies Sticker to reveal its true nature!) / Tower Hobbies TS-53 "standard" servo, "hacked" for full rotation. The test procedure I used is described elsewhere. Voltage No-load Current (mA) No-load Speed (deg/sec) Efficiency (deg / mW-sec) 0.5 31.6 14.4 0.9113 1.0 33.7 43.27 1.284 2.0 42.4 109.0 1.285 3.0 50.1 176.0 1.171 4.0 55.5 241.6 1.088 5.0 63.1 307.7 0.9753
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