LM Series Catalog

Product catalog summary

Overview
Sankyo's LM Limiters are designed to protect against overloads in linear motion applications, particularly in high-speed environments such as pick and place units. The mechanism includes a slide unit and a ball & ball pocket arrangement, providing a compact solution for part handler protection.

Key Features

Linear Overload Protection: Unique in protecting against linear motion overloads, easily mountable on output shafts of pick and place units.
Accurate Operation: Utilizes a reliable ball & ball pocket mechanism to minimize friction loss.
Tripping Force Adjustment: Torque adjustment is achieved through a simple pressure nut adjustment.
Overload Detection: Displacement of the ball triggers an overload detection pin, which can activate sensors for machinery stop control.
Precise Resetting Accuracy: Returns to within ±0.03 mm of its original position after tripping.
Compact Design: Lightweight and compact, suitable for high-speed reciprocating motions.

Model Selection
The LM Limiter is used to protect reciprocating members from work overloads. The document provides formulas to calculate inertial force, workload force, frictional load force, required torque, and tripping force adjustment value. An example is provided for the Sankyo Parts Handler 5GY.

Handling Procedures

Mounting holes are provided in the rail diagrams.
Use tapped holes in the base for mounting attachments, with specified tightening torques for different bolt sizes.
Regular application of grease (Omega 77 or equivalent) is recommended monthly.

Mechanism
When an overload occurs, the detection pin protrudes, allowing for sensor activation to return error information to the control circuit.

Mounting Examples
Illustrations show vertical and horizontal mounting options, with overload detection using proximity switches or micro photo sensors.

Catalog excerpts

THEORY OF OPERATION > Sankyos LM Limiters are a compact solution for part handler protection against linear motionrestrictions. The mechanism consists of a slide unit and ball & ball pocketarrangement. FEATURES > 1.Linear Overload ProtectionThe LM Limiter is the only torque limiter that protects against overloads in linear motions;particularly high-speed linear motions such as those performed by pick and place units (i.e. SankyoҒs Parts Handler). The LM Limiter mounts easily on the output shaft of pick and place units and reciprocal moving members driven by air cylinders.2.Accurate OperationThe...

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MOUNTING EXAMPLES Ve r t i ca l M ou n t H o riz o n ta l M ou n t > Overload detection usinga proximity switch Overload detection using a micro photosensor

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