Where is harmonic drive used?
Harmonic Drives have been employed in a variety of applications that range from such low-cost consumer applications as vending machines and rotating home-television antennas to sophisticated systems for military and aerospace use.
Is Harmonic Drive back drivable?
Harmonic drives were once popular for robot arms, because they provide huge gear reductions in a small space. But they’re not back-drivable at all – overload one and you break gear teeth.
What are the advantages of a harmonic drive?
Compared to classical toothed gears, harmonic drives have numerous advantages, but there are some disadvantages as well. Their main advantages include: high torque capacity, excellent positioning accuracy and repeatability, compact design, zero backlash, high single-stage reduction ratios and high torsion stiffness.
Who invented the harmonic drive?
Walt Musser
Musser. Walt Musser is credited with over 250 major inventions and discoveries. One of those inventions: the Harmonic Drive® Strain Wave Gear.
How does a harmonic drive work?
Harmonic Drive developed a unique gear tooth profile that optimizes the tooth engagement. This tooth profile (the “S tooth”) enables up to 30% of the total number of teeth to be engaged simultaneously. Additionally the large tooth root radius increases the tooth strength compared with an involute tooth.
How is harmonic drive calculated?
Diametral Pitch (Dp) = 0.393700787 teeth/mm (10 teeth/in) Tooth difference = 2 selected Ratio calculation of Harmonic drive first stage I = F.S./(C.S. – F.S.). I = 50 / (52 – 50) I = 50 / 2 I = 25 First stage reduction 25:1. Ratio calculation of Harmonic drive second stage I = F.S./(C.S.
Why are harmonic drives so expensive?
While harmonic drives have few parts and those parts aren’t expensive, they are still uncommon and usually only used for specialty applications. That makes them pricey. Most harmonic drives gearboxes are driven by brushless DC (BLDC) electric motors, but this one is driven by a stepper motor.
Why are harmonic drives used in robotics?
Harmonic drives have three components, a wave generator, a flex spline, and a circular spline. These drives reduce the gears on a robotic system, ultimately saving you increased maintenance costs.
How do harmonic drives work and what is the benefit of this system?
Harmonic Drive gears are noted for their ability to deliver precision motion control with very low or even zero backlash and vibration, providing high reduction ratios through concentric shafts in a lightweight yet robust assembly.
How are harmonic drives made?
Basically, the HarmonicDrive® -developed to take advantage of the elastic dynamics of metal- is typically made up of only three components: a wave generator, a flexspline and a circular spline (Depending on its shape, the HarmonicDrive® is sometimes made up of four components; but even this four-component Harmonic …
How is Harmonic Drive calculated?
What is a cycloidal reducer?
A cycloidal drive or cycloidal speed reducer is a mechanism for reducing the speed of an input shaft by a certain ratio. Cycloidal speed reducers are capable of relatively high ratios in compact sizes with very low backlash. These output shaft pins directly drive the output shaft as the cycloidal disc rotates.
Who is harmonic drive?
Since 1970, Harmonic Drive has been the leading manufacturer of precision gears and is your first point of contact worldwide when it comes to highly developed drive solutions.
What happened to Harmonic Drive Antriebstechnik?
A shift of emphasis to servo technology was reflected in 1994 in the change of the company name to Harmonic Drive Antriebstechnik GmbH. Reinhard Ernst held all shares in the company, and invested in it significantly in the years that followed.
What is the operational efficiency of a harmonic drive?
The efficiency of a typical harmonic drive measured on real shaft to shaft tests by the manufacturer goes up to 90%. There are very few mechanical engineering elements that can claim such an operational efficiency level.
Why choose a hiharmonic drive® rotary actuator?
Harmonic Drive® rotary actuators are the easiest solution for your high precision motion control applications. Performance matched precision gearing, motors, and encoders are designed to provide a power dense, cost effective solution.
