Machine Tool Rotary Feed Control for Seamless Speed Switching
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Solution Overview
Problem
Existing machine tool control systems, such as those for milling machines and lathes, have conditionally satisfactory operational sequences due to the need for constant hand position changes between separate potentiometers for setting advancing and rapid speeds, leading to inefficiencies and potential risks of damage.
Innovation Solution
A multi-functional, infinitely rotatable rotary control element allows for seamless switching between advancing and rapid-speed phases without fixed end stops, enabling operators to maintain focus on the tool head for more precise and efficient control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate potentiometers are used for setting advancing speed and rapid speed, then each speed parameter can be independently controlled, but the operator must constantly change hand position between control elements reducing operational efficiency
Solution Approach 1:
The patent combines two separate control elements (potentiometers for advancing speed and rapid speed) into a single multi-functional rotary control element. This allows the operator to control both speed parameters using one hand position, eliminating the need to move the hand between separate controls and thereby improving operational efficiency while maintaining independent control of each speed parameter
Solution Approach 2:
The rotary control element is designed to perform multiple functions: it can set both advancing speed and rapid speed, and it can operate in different modes (processing phase and rapid-speed phase) without requiring separate dedicated controls for each function. This universal control element resolves the contradiction by providing consolidated control that improves productivity without sacrificing operational capability
2Reliability
If fixed end stops are provided on rotary control elements, then the control range is clearly defined, but switching between processing phase and rapid-speed phase becomes problematic
Solution Approach 1:
The patent implements a rotary control element with infinitely rotatable activation part that lacks fixed end stops, allowing dynamic adaptation between different operational phases. The control element can rotate continuously without mechanical limits, enabling seamless switching between processing phase and rapid-speed phase control modes, thereby resolving the contradiction between reliable control and phase adaptability
Data Source
AI summary
A control device for operating a machine tool having a motor-driven, traversable and positionable tool head. The control device executes a freely programmable control program and determines or co-determines the sequence of operations of the machine tool. The control device also comprises a user interface for influencing the sequence of operations of the machine tool by manual control, at least one operating element for manually controlling changes to movements of the tool head being formed on the user interface. A multi-functionally designed operating element is designed to manually preset or influence a feed rate during a machining phase of the tool head and which multi-functionally designed operating element, in a second usage mode, is designed to manually preset or influence a rapid-traverse rate during a rapid-traverse phase of the tool head. The multi-functionally designed operating element is designed as a rotary actuator operating element comprising a continuously rotatable actuating member.