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What type of linear robot can meet high-speed and high-precision process requirements?

2026/04/27 By le zhan

linear robot 1-3

In automated processes such as injection molding and electronics assembly, linear robots are required to achieve rapid cycle times and extremely high precision. A linear robot that moves quickly but lacks positioning accuracy can destabilize the production line, whereas a robot with high positioning accuracy but excessively slow movement speeds will compromise overall production output. How, then, can these two attributes be effectively combined? Topstar believes that a linear robot capable of meeting the demands for both high speed and high precision must possess the following key characteristics:

  1. High-speed motors
  2. A rigid structural design
  3. Precise drive control
  4. vibration suppression capabilities

When these characteristics are integrated into a linear robot, it becomes capable of satisfying the high-speed and high-precision requirements inherent in injection molding and electronics assembly processes, precisely what Topstar’s EU series of injection molding robots delivers.

Linear Robot Meeting High-Speed ​​and High-Precision Process Requirements

A linear robot equipped with high-speed motors capable of reaching speeds up to 6,000 RPM can boost maximum operating speeds by 10% while simultaneously reducing acceleration and deceleration times by 20%. With instantaneous speeds of up to 3 m/s, the robot can significantly shorten the overall cycle time. Building upon this foundation, the main arm utilizes a lightweight, high-strength A6061 aluminum alloy material. This is combined with a dual-sided front-and-rear rack-and-pinion drive and an imported drive featuring built-in vibration suppression functionality. This configuration effectively minimizes vibration and enhances operational stability, ensuring a repetitive positioning accuracy of ±0.01 mm during gripping operations.

Equipped with High-Speed ​​Motors Reaching 6,000 RPM

The most direct method for increasing the speed of a linear robot is the adoption of high-speed motors. Topstar’s EU series employs high-speed motors capable of reaching 6,000 RPM, thereby boosting operating speeds by 10% and shortening acceleration/deceleration times by 20%. As a result, this gives the robot the dynamic responsiveness it needs for processes that require rapid cycle times, allowing it to start moving faster, complete extraction tasks more quickly, and return to the home position more efficiently. Such rapid motor responsiveness allows the robot to execute operations within the extremely brief window of the mold-opening phase, resulting in significantly faster overall cycle times.

Equipped with High-Speed ​​Motors Reaching 6,000 RPM

Instantaneous Speeds Up to 3 m/s for Rapid Response

Topstar’s EU series injection molding robots can achieve maximum speeds of up to 3 m/s, making them ideally suited for part extraction applications across various sectors, including thin-walled products, 3C electronics, medical devices, and packaging.

The capability to achieve instantaneous speeds of up to 3 meters per second without any waiting time translates directly into higher production efficiency, enabling immediate response, smooth motion, and precise stopping. When the injection molding machine, the mold, and the robot operate in perfect synchronization, the entire production line achieves greater efficiency, and production management becomes significantly more streamlined.

Instantaneous Speeds Up to 3 ms for Rapid Response

Linear Robot Featuring A6061 Aluminum Alloy Arms Minimize Vibration

By utilizing lightweight, high-strength A6061 aluminum alloy for the main arm, these linear robots can reduce vibration amplitude by 20%, thereby enhancing control precision during high-speed movements. High-frequency vibrations in a linear robot can compromise positioning accuracy, part stability, and repeatability. If the robot arm vibrates excessively, the robot may fail to return to the same position during every cycle. This can lead to issues during critical operations such as part extraction, insert placement, and the transfer of parts to downstream equipment. The key advantage of A6061 aluminum alloy lies in its optimal balance between strength and weight; it makes the robot arm lighter, facilitating faster movement and requiring less energy for acceleration while simultaneously ensuring the arm maintains its structural rigidity under specific loads.

Linear Robot Featuring A6061 Aluminum Alloy Arms Minimize Vibration

Rack-and-Pinion Drive System Achieves Repeatability of ±0.01 mm

Topstar employs a rack-and-pinion drive system for both the fore-and-aft axes of its linear robots. This design enhances the robot’s positioning accuracy and enables a remarkable repeatability of ±0.01 mm. The primary benefit of the rack-and-pinion system is that it provides the robot with direct and stable motion transmission. Unlike other drive mechanisms that may introduce excessive backlash or uncertainty into the motion path, this system helps the injection molding robot return to the same position with exceptional consistency. In injection molding applications, this allows for the precise execution of operations such as part extraction, insert loading, or component transfer.

This precision is particularly critical in scenarios involving small parts such as optical components or precision inserts, where an exact extraction trajectory is essential. In such cases, the linear robot must not only move rapidly but also execute movements along a highly predictable trajectory. Linear robots equipped with a rack-and-pinion drive system possess the requisite control precision to meet these exacting requirements.

Integrated Vibration Suppression for Stable Extraction

Featuring an integrated vibration suppression function, the robot maintains stability during high-speed operation, specifically during part extraction, placement, and motion transitions. Part extraction represents the phase of greatest stress for the robot; at this critical juncture, the part is in proximity to the mold, the timing for ejection may be extremely tight, and the robot must execute rapid movements without interfering with the product. With its integrated vibration suppression capability, the linear robot handles these scenarios with significantly greater smoothness. This technology minimizes vibration, enhances motion consistency, and facilitates more precise gripping.

Integrated Vibration Suppression for Stable Extraction

The EU Series linear robot: Meeting High-Speed, High-Precision Process Requirements

A linear robot designed to meet the demands of high-speed, high-precision processes must possess the following attributes: high-speed motors, rapid acceleration and deceleration capabilities, a lightweight yet robust mechanical arm, a high-precision drive and transmission system, and vibration suppression functionality. Topstar’s EU Series robots integrate all these essential features into a single, cohesive system.

Selection RequirementWhat the Robot NeedsTopstar EU Series Feature
Fast cycle timeHigh motor speed and quick responseMotors up to 6,000 rpm, +10% max speed
Stable accelerationReduced motion lag-20% acceleration/deceleration time
High precisionRepeatable motion under loadRack-and-pinion drive, ±0.01 mm repeatability
Lower vibrationStable arm structureA6061 aluminum alloy arm, -20% vibration amplitude
Stable extractionMotion control under real loadIntegrated vibration suppression

 

 

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