Desktop Laser Motion Control With Pre-Calculated Trajectory Queues
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Solution Overview
Problem
User-level desktop smart laser devices face challenges in controlling the motion of their actuators for laser cutting and engraving, differing significantly from traditional industrial laser cutting machines.
Innovation Solution
A motion control method and apparatus for a desktop smart laser device, involving the sequential generation of a trajectory point queue, pre-scanning of curves, pre-calculating motion commands, and traversing the queue to perform laser processes based on configured data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional industrial laser cutting machine control methods are used, then manufacturing precision can be maintained, but device complexity and ease of operation deteriorate for user-level desktop devices
Solution Approach 1:
The patent pre-calculates motion commands for trajectory points before actual laser cutting execution. The controller pre-processes the cutting path data, computes motion parameters including velocity and acceleration for each trajectory point, and stores these pre-calculated commands. This preliminary action simplifies real-time operation since the device only needs to execute pre-computed commands rather than performing complex calculations during cutting, thus improving ease of operation while maintaining precision.
2Manufacturing precision
If complex motion control algorithms are implemented, then manufacturing precision improves, but productivity and ease of operation worsen
Solution Approach 1:
The patent implements pre-calculation of motion commands offline before production runs. All complex motion planning, velocity profiling, and acceleration calculations are performed in advance when the cutting path is defined, not during actual cutting operations. This allows complex algorithms to be executed once during setup, enabling high-speed execution during production without real-time computational overhead, thus maintaining manufacturing precision while improving productivity.
Solution Approach 2:
The patent divides the cutting path into discrete trajectory points with predetermined motion parameters. Each trajectory point contains pre-calculated velocity, acceleration, and position data. This segmentation transforms continuous complex motion control into discrete, pre-computed steps, allowing parallel processing and optimization of each segment independently, thereby maintaining precision while enhancing overall productivity through efficient batch processing.
3Productivity
If real-time motion calculation is performed during laser cutting, then adaptability improves, but loss of time and productivity worsen
Solution Approach 1:
The patent performs all motion parameter calculations in advance during the path definition phase, storing velocity, acceleration, and position data for each trajectory point before cutting begins. This eliminates real-time computational delays during actual cutting operations. The pre-calculated commands are stored in memory and executed sequentially during production, completely avoiding time loss that would result from real-time calculations, thus maximizing productivity without sacrificing adaptability since the system can still handle different cutting paths by re-running the pre-calculation process.
Data Source
AI summary
Provided are a motion control method and apparatus in a desktop smart laser device, and a desktop smart laser device. The method comprises: for data configured as motion control in a cache region, sequentially generating trajectory point queues for the desktop smart laser device to execute laser process (S210); pre-scanning a curve of the trajectory point queues, and positioning head and tail trajectory points of a mapped curve segment (S220); pre-calculating the motion of covered trajectory points according to the head and tail of the mapped curve segment to obtain instruction parameters for operating the trajectory points, and updating the instruction parameters to the trajectory point queues (S230); and traversing the trajectory point queues, and executing, according to traversed trajectory point motion instructions, the operation of the desktop smart laser device at the trajectory points until the traversal ends (S240).