WHITE PAPERS: ACCURACY
Why is the Archimedes Drive so accurate?
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Flat-Linear Hysteresis Curve Achieved
With Zero backlash and high stiffness, the Archimedes Drive achieves a stable hysteresis curve, delivering superior motion control and accuracy.
High Stiffness Actuators for Robots
Explore how the Archimedes Drive maximizes accuracy through unparalleled stiffness, optimized stress distribution, and advanced torsional resistance.
Why Micro-Slip is a Feature, Not a Flaw
The Archimedes Drive turns micro-slip into an advantage, ensuring continuous contact, zero backlash, and real-time velocity correction for unmatched precision and efficiency
Accelerating Production of Industrial Robots
By reducing production complexity, the Archimedes Drive speeds up industrial robot manufacturing to meet rising global demand.
Why is the Archimedes Drive so accurate? Small discrepancies in gearboxes amplify into positioning errors. High stiffness, True zero blacklasn and slip cnotrol.
Actuator Strategies for Humanoid Balance
Discover static and dynamic balance strategies in humanoid robots and their advantages and limitations.
Archimedes Academy EP. 3: Strain Wave Gear (Harmonic Drive)
Today, we will focus on the strain wave gear, also commonly known as the harmonic drive, named after the company that pioneered its commercialization.
Archimedes Academy EP. 4: Planetary Drives
Today, we will focus on Planetary Drives
Archimedes Academy EP. 6: Compound Principle
HOW DO COMPOUND DRIVES WORK? Summary In this sixth installment, we’re uncovering the intricate world of compound drives—a class of mechanical systems essential for achieving
Archimedes Drive Working Principle
Archimedes Drive working principle
The evolution of robotics and mechatronics necessitates precise motion control; the Archimedes Drive offers a revolutionary solution to backlash.
Building humanoid joints – Arm &Neck
Explore how humanoid arms and necks achieve precision and speed through innovative designs.
Challenges in building humanoid joints – Part 3: The Archimedes Drive
The Archimedes Drive sets new standards for humanoid joints with its advanced hardware solutions.
Challenges in Humanoid Joints – Legs
Learn about the key challenges in humanoid leg joints: balance, payload, and actuator efficiency.
Cycloidal Drive Working Principle
In this lesson from the Archimedes Academy by IMSystems, we explore the working principle, key terminology, and advantages and disadvantages of cycloidal drives, a widely used speed reducer in robotics.
Cycloidal vs Harmonic vs Traction Drive: Choosing a Robot Joint Reducer
Cycloidal vs Harmonic vs Traction Drive: Choosing a Robot Joint Reducer Robot joints use three main categories of precision speed reducer: cycloidal drives, harmonic drives
Backlash can have a significant impact on the accuracy, repeatability, and efficiency of a mechanical system, which can be particularly detrimental in high-precision applications.
Flat-Linear Hysteresis Curve Achieved
With Zero backlash and high stiffness, the Archimedes Drive achieves a stable hysteresis curve, delivering superior motion control and accuracy.
Four Commonly used Industrial Robots which will be Revolutionized by the Archimedes Drive
Articulated Arm, SCARA, Cobots, Delta… in which industries those robots are communly used and how those markets are predicted to develop.
Concepts in Mechanical Engineer around transmission system and actuator for robotic application.
High Stiffness Actuators for Robots
Explore how the Archimedes Drive maximizes accuracy through unparalleled stiffness, optimized stress distribution, and advanced torsional resistance.
Learn about traction drives in robotics: their history, how they work, key advantages like high efficiency and low noise, and why designs like the Nasvytis Drive never went mainstream.
How to Choose Arm Joint Actuators for a Wheeled Humanoid
How to Choose Arm Joint Actuators for a Wheeled Humanoid An arm joint actuator for a wheeled humanoid is the module of motor, speed reducer,
How to Measure the Performance of Joints in Humanoid Robots
Each humanoid joint requires unique metrics—discover the key performance tests
Human-Robot Interaction: Matching Expectations
Humanoid robots are transforming industries, but seamless integration remains a challenge. Learn key factors in human-robot interaction.
As energy prices heavily fluctuate and resources become more scarce, efforts have to be made towards the usage of renewable resources and reduction in energy consumption.
Navigating the Future of Industrial Robotics
The Archimedes Drive is the long-awaited innovation that can overhaul the industrial robotics market, and usher in an era of radical evolution through a combination of precision and speed.
Accelerating Production of Industrial Robots
By reducing production complexity, the Archimedes Drive speeds up industrial robot manufacturing to meet rising global demand.
Why is the Archimedes Drive so accurate? Small discrepancies in gearboxes amplify into positioning errors. High stiffness, True zero blacklasn and slip cnotrol.
Actuator Strategies for Humanoid Balance
Discover static and dynamic balance strategies in humanoid robots and their advantages and limitations.
Archimedes Academy EP. 3: Strain Wave Gear (Harmonic Drive)
Today, we will focus on the strain wave gear, also commonly known as the harmonic drive, named after the company that pioneered its commercialization.
Archimedes Academy EP. 4: Planetary Drives
Today, we will focus on Planetary Drives
Archimedes Academy EP. 6: Compound Principle
HOW DO COMPOUND DRIVES WORK? Summary In this sixth installment, we’re uncovering the intricate world of compound drives—a class of mechanical systems essential for achieving
Archimedes Drive Working Principle
Archimedes Drive working principle
The evolution of robotics and mechatronics necessitates precise motion control; the Archimedes Drive offers a revolutionary solution to backlash.
Building humanoid joints – Arm &Neck
Explore how humanoid arms and necks achieve precision and speed through innovative designs.
Challenges in building humanoid joints – Part 3: The Archimedes Drive
The Archimedes Drive sets new standards for humanoid joints with its advanced hardware solutions.
Challenges in Humanoid Joints – Legs
Learn about the key challenges in humanoid leg joints: balance, payload, and actuator efficiency.
Cycloidal Drive Working Principle
In this lesson from the Archimedes Academy by IMSystems, we explore the working principle, key terminology, and advantages and disadvantages of cycloidal drives, a widely used speed reducer in robotics.
In gearboxes and mechatronic setups, accuracy is crucial on two fronts: at the component level, where even small discrepancies matter, and at the system level, where these discrepancies can amplify into major positioning errors.
Errors that lead to the poor positioning accuracy of robots can be divided into two categories: geometric errors and non-geometric errors.
- Geometric errors are caused by manufacturing: they are the discrepancies between a system’s designed kinematic parameters (like link lengths, offsets, joint angles, and twists) and the actual physical build, which lead to positioning deviation.
- Non-geometric errors are dynamic deviations in positioning caused by effects like joint deformation, backlash, and other load-dependent phenomena.
However, it is difficult to compensate for the non-geometric errors by modelling. Those errors come from the component nature of the system, which is where the Archimedes Drive Delivers a major advantage. As a very accurate component, it results in limiting the non- geometric errors.
When it comes to transmission systems in a mechatronic system: Accuracy values represent the difference between the theoretical angle and the actual angle of output for any given input. When we say the Archimedes Drive is “very accurate,” we mean that for any given input, the resulting output angle closely matches the target angle, leaving only a minimal difference between the commanded position and the actual position.
Our goal in this series of articles is to substantiate this claim with empirical evidence. Moreover, we will focus on accuracy alone, not repeatability. As repeatability is relatively easier to obtain with stable control algorithms and a well-calibrated system. Accuracy, however, requires precise mechanical design, high stiffness, and elimination of backlash and compliance—factors that the Archimedes Drive optimizes inherently.
“Repeatability is doing the same task over and over again, while accuracy is hitting your target each time.”
— Ahmed Joubair, Ph.D
Because we aim to demonstrate how the Archimedes Drive achieves high accuracy, the following key attributes will be examined:
– High Stiffness (1):
The Archimedes Drive exhibits exceptionally high torsional stiffness, ensuring that the torsional force from the motor at the input has negligible impact on the output position. This results in a minimal angular difference between the reference position and the actual position of the output.
– Absence of Backlash and the effect of minimal lost motion (2):
A defining feature of the Archimedes Drive is its True Zero backlash. The elimination of backlash, combined with its high stiffness, yields a very flat hysteresis curve. The zero backlash characteristic of the drive contributes by eliminating mechanical play that could otherwise distort the output.
– Efficient Control System (3):
These attributes collectively confirm the Archimedes Drive’s ability to place the output exactly where it should be—meeting the stringent accuracy requirements of high-performance mechatronic applications. In the sections to follow, we will delve into each of these factors to illustrate why the Archimedes Drive stands out as an exceptionally accurate solution.