Food Slicing Machine Motor Torque Assistance Profile
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Solution Overview
Problem
Food product slicing machines in servo operating mode require excessive operator effort due to inconsistent motor assistance, leading to jerky movements and increased fatigue, as the assistance is not adaptive to carriage speed and acceleration.
Innovation Solution
The drive motor assistance in the servo operating mode is adjusted based on carriage speed and acceleration parameters, allowing for overproportional torque at low speeds for smooth starting and automatic braking, with adjustable assistance profiles to accommodate different products and operators, and a braking assistant to reduce operator effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the drive motor provides constant assistance in servo operating mode, then the operator effort is reduced, but the carriage movement becomes jerky and unstable especially during starting and stopping
Solution Approach 1:
The patent applies dynamics by making the motor assistance variable rather than constant. The control device adjusts the motor torque dynamically based on the carriage speed and acceleration, providing higher assistance during starting and stopping phases when instability occurs, and reducing assistance during steady-state movement. This dynamic adjustment resolves the contradiction by maintaining movement stability while still reducing operator effort overall.
Solution Approach 2:
The patent changes the parameter of motor torque from a fixed value to a variable value that depends on carriage speed and acceleration. The control device modifies the motor assistance parameter in real-time according to the operational phase, providing overproportional torque during low-speed starting and automatic braking during deceleration. This parameter change enables the system to maintain stability while reducing overall operator effort.
2Reliability
If the drive motor provides high torque assistance during starting movement, then smooth jerk-free starting is achieved, but the motor torque must be limited at high speeds to prevent uncontrolled running
Solution Approach 1:
The patent implements feedback control where the control device continuously monitors carriage speed and acceleration, then adjusts the motor torque accordingly. During starting, the system detects low speed and high acceleration, providing high torque assistance for smooth启动. During high-speed operation, the feedback mechanism detects the speed increase and automatically limits or reverses the torque to prevent uncontrolled running. This feedback loop resolves the contradiction by automatically adapting torque levels without requiring complex manual control mechanisms.
Solution Approach 2:
The control system performs self-service by automatically adjusting motor torque based on detected carriage parameters. The system monitors its own operational state (speed and acceleration) and autonomously modifies the assistance level without external intervention. This self-regulating mechanism achieves both smooth starting and high-speed limitation while keeping the control system relatively simple, as the same control device handles both functions through parameter-based logic.
3Ease of operation
If the carriage can be operated manually with motor assistance, then the expenditure of force is reduced, but the carriage may begin to move of its own accord when given a slight push
Solution Approach 1:
The patent applies partial action by providing motor assistance only when and where needed, rather than constant full assistance. The control device activates motor torque selectively during phases where instability occurs (starting, stopping, low-speed movement) while providing minimal or no assistance during steady-state movement. This partial assistance approach reduces the likelihood of the carriage moving on its own while still providing sufficient support to reduce operator effort during critical phases.
Solution Approach 2:
The system applies preliminary anti-action by detecting the operational phase and pre-adjusting motor torque to counteract potential instability before it occurs. During low-speed starting, the control device anticipates the need for high torque to prevent jerky movement. During deceleration, it prepares braking torque to prevent uncontrolled running. This preliminary adjustment of motor assistance based on detected parameters prevents unwanted movement while maintaining ease of operation.
Data Source
AI summary
In order to improve a food product slicing machine with a circular knife, a carriage for accommodating products to be cut which is guided for displacement parallel to the cutting plane of the circular knife, and a drive motor for the displacement of the carriage, wherein the carriage can be operated manually in a servo operating mode and the operation is assisted by the drive motor, the slicing machine is configured that the assistance by the drive motor in the servo operating mode is dependent on at least one parameter of the carriage movement, wherein the at least one parameter may include the speed or acceleration of the carriage.