Product image of Gripper

・High-precision grip force control, speed control and position control are feasible.
・Work sizes and work falls are also detectable.
・Reduced in size and weight by adopting the cam mechanism, and multidimensional mounting made feasible with robot arms or the like.

Features

Cam Structure

■Cam Structure

Adopts a spiral cam structure.
Provides excellent transmission efficiency to linear motion, achieving high precision and high efficiency.

Long Stroke

■Long Stroke

Achieves one of the longest strokes in the industry despite its compact design.

Lightweight and Compact

■Lightweight and Compact

Achieves industry-leading lightness and a compact size.

High-Precision Gripping Force

■High-Precision Gripping Force

Direct drive via the cam mechanism achieves high-precision gripping force of ±15%.
Enables stable gripping of various workpieces.

Accuracy

■Accuracy

Repeatability of ±0.02 mm for precise positioning.

Parts List

Click the arrow icon in the table below to switch from ascending to descending order.

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Motor size (number of fingers)

Stroke
[mm]

Grip force
lower limit
[N]

Grip force
upper limit
[N]

Repetitive positioning accuracy
[mm]

Weight
[g]

□20mm(2 fingers) 11 0.7 2.4 ±0.02 100
□25mm(2 fingers) 13 2.0 6.0 ±0.02 190

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FAQ

What are the advantages and disadvantages of stepping motors?
The main advantage is high-precision positioning via a simple open-loop control setup, while the disadvantage is the risk of a stall during high-speed rotation.
Because position sensors are unnecessary, they offer a low-cost, simple configuration. They excel in holding torque at a standstill and deliver high torque at low speeds. However, torque drops sharply at high speeds, requiring caution against stalls caused by overloads, heat generation, and vibration.
What is a stall, and why does it occur?
A stall occurs when the motor's rotation fails to keep up with operation commands (pulse signals), resulting in a loss of synchronization.
Main causes include sudden acceleration or deceleration, overloads exceeding the motor's capacity, and external physical impacts. Click here for details.
What is the lifespan of a stepping motor?
They offer a long lifespan due to the absence of consumable parts like brushes. The main life-limiting factor is bearing degradation.
The standard expected lifespan depends on the bearing grease's service life, generally estimated at 20,000 to 30,000 hours. However, excessive shaft loads or high-temperature environments will reduce this lifespan.

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