Harmonic Drive™ gear is in a class of its own when it comes to motion control and mechanical power transmission. With operating principles and construction that maximize output torque and minimize size and weight, Harmonic Drive™ gear offers advantages such as high reduction ratios in a single stage, zero backlash, and high precision that cannot be equaled by conventional gear trains.
Excellent Positional Accuracy and Repeatability - Positional accuracy may be minimized within one arc minute and repeatability within a few seconds.
High Torque Capacity - Since power is transmitted through multiple tooth engagement, the gear offers high output torque capacity equal to drives twice its size and three times its weight.
Single-Stage High Reduction Ratio - With only three elements, the single-stage reduction ratios range from 50:1 to 320:1 with the same weight and mechanical dimensions.
Zero Backlash - Cup-type gear operates with zero backlash between mating teeth because of natural gear preload and radial tooth movement. The only shaft-to-shaft backlash that exists, originates in the input coupling (oldham coupling) and ranges from 2-36 arc-sec depending on unit size and reduction ratio. This coupling can be eliminated if necessary, resulting in zero backlash for the entire drive.
In - Line Configuration - The gearing input and output shafts are concentric, allowing machine designers to dramatically reduce the required packaging space compared to other high ratio, high torque drives.
High Torsional Stiffness - The new "S" tooth profile greatly improves the torsional stiffness of the gear allowing greater precision and higher servo gains.
Efficiencies - Operating efficiencies of up to 90% can be obtained. Ratings are based on actual shaft-to-shaft tests.
Back Driving - Harmonic Drive™ gear is reversible and can be back driven. If necessary, loads can be held in place by braking the Wave Generator when the servo system is not powered.