Stepper Motor Transport Carriage Positioning Control

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Solution Overview

Problem

Existing transport devices for circulating object transport lack flexibility and precision, often requiring complex stop mechanisms or additional motors for precise positioning on processing devices, limiting their adaptable use in various industrial applications.

Innovation Solution

The use of stepper motors with a central control unit for each transport carriage allows independent and precise positioning on processing devices, eliminating the need for additional motors and enabling flexible movement along curved paths, with a sliding contact rail for communication and power supply, and position monitoring for enhanced accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a central drive is used to move all transport carriages along the transport path, then the structure is simple and cost-effective, but the flexibility to move transport carriages independently is limited

Engineering Contradiction:

Improvedrive structureVSAvoidflexibility

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The transport system is segmented into multiple independent transport carriages, each equipped with its own drive unit. This segmentation allows each carriage to be controlled independently while maintaining the overall simplicity of the modular structure, resolving the contradiction between structural simplicity and operational flexibility.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system transitions from a static centralized drive to a dynamic distributed drive architecture where each transport carriage can independently adjust its speed and position. This dynamic capability enables flexible control of individual carriages while maintaining the simple modular structure.

Inventive Principle:

Principle #15Dynamics

2Manufacturing precision

If special coordinated stop mechanisms are required on processing devices to stop individual drives, then precise positioning is achieved, but the flexible use of different transport carriages is limited

Engineering Contradiction:

Improvepositioning precisionVSAvoidflexibility

Core Design Contradiction:

Manufacturing precisionVSAdaptability or versatility

Solution Approach 1:

Each transport carriage is equipped with its own drive unit and control system, enabling it to self-regulate its speed and position independently. This self-service capability eliminates the need for complex external stop mechanisms while maintaining precise positioning and enhancing flexibility.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The control unit receives position information from sensors and automatically adjusts the drive parameters of each transport carriage to achieve precise positioning. This closed-loop feedback control enables accurate positioning without requiring mechanical stop mechanisms, thereby maintaining flexibility.

Inventive Principle:

Principle #23Feedback

3Adaptability or versatility

If stepper motors with individual control are used for each transport carriage, then flexibility and positioning precision are greatly improved, but the device complexity increases

Engineering Contradiction:

ImproveflexibilityVSAvoidcontrol system

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

A universal control unit is designed to manage multiple transport carriages through standardized communication protocols and control interfaces. This multi-functional control system can adapt to different carriage configurations and requirements, reducing overall system complexity while maintaining high flexibility and precision.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This solution provides high flexibility and precision in positioning transport carriages, reducing costs and operational complexity while allowing for precise alignment and movement between processing devices, even on expanded or modified transport paths.

Implementation Method 1

each individual drive has a stepper motor for moving the respective transport carriage along the transport path and for positioning the transport carriage on one of the processing devices

Methodology Applied

Scientific EffectStepper motor: Linear Motor

Implementation Method 2

a sliding contact rail for communication and power supply

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentEP2877382B1Transport device for transporting objects in a circulating manner

Publication Date: 2017.02.01 MACHINES HIGHEST MECHATRONIC

AI summary

Transport device for transporting objects (22) in a circulating manner along a circulating transporting path (10), in particular for a printing press, having at least one transport carriage (20), to which an object (22) can be fastened, and at least two processing devices (15, 16) which are arranged along the transport path (10) for processing an object (22), wherein each transport carriage (20) has an individual drive (25) for moving the respective transport carriage (20) along the transport path (10), characterized in that each individual drive (25) has a stepping motor (25) for moving the respective transport carriage (20) along the transport path (10) and for positioning the transport carriage (20) at one of the processing devices (15, 16), and in that there is a central control unit (40) which is set up to output a digital positioning command for the stepping motors (25) for moving the transport carriage (20) and for positioning the transport carriage (20) at one of the processing devices (15, 16).