Rotating Pen Holder Control for Variable Line Width Drawing
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Solution Overview
Problem
Existing drawing devices cannot dynamically change the line width of a line segment during the drawing process, limiting the expressive power of the drawn object.
Innovation Solution
A drawing device that includes a holder, a first movement portion, a rotation portion, a processor, and a memory, which allows for the rotation of the pen holder based on angle data for each line segment, enabling variable line widths during drawing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the drawing line width is set to a constant pre-set value, then the drawing device can maintain simple control structure, but the power of expression of the object appearance becomes poor
Solution Approach 1:
The patent applies the dynamics principle by enabling the holder to rotate around a rotational axis parallel to the Z direction, allowing the pen orientation to change dynamically during the drawing process. This rotation capability enables the line width to vary according to the angle data stored in memory, transforming the drawing device from a static to a dynamic system that can adapt line width to different line segments, thereby improving the power of expression without significantly complicating the control structure
Solution Approach 2:
The patent implements parameter changes by varying the rotation angle of the holder as a controllable parameter. The memory stores angle data corresponding to different line segments, and the processor controls the rotation portion to adjust the holder's rotation angle according to this data. This parameter change approach allows the line width to be modified systematically across different line segments, enhancing the expressiveness of the drawn object while maintaining structured control
2Adaptability or versatility
If the pen holder is rotated per line segment, then the line width can change to improve expressive power, but the device complexity increases
Solution Approach 1:
The rotation portion enabling the holder to rotate around a rotational axis parallel to the Z direction implements the dynamics principle. This mechanical rotation capability allows the pen orientation to change dynamically during drawing, enabling line width variation across different line segments. The dynamic rotation mechanism is integrated into the existing XY movement system, achieving line width adaptability without requiring a completely new device architecture
Solution Approach 2:
The holder serves multiple functions: it holds the pen for drawing and simultaneously acts as a rotatable component for controlling line width variation. The rotation portion integrated with the holder combines positioning and orientation control in a single mechanism. This multi-functionality approach reduces overall device complexity by making existing components perform multiple roles rather than adding separate dedicated systems
Data Source
AI summary
A drawing device for drawing an object on a workpiece using a pen includes a holder, a movement portion to move the holder, a rotation portion to rotate the holder, and a memory storing, for each of a plurality of line segments configuring the object, drawing data relating to a position and a length of the line segment, and angle data relating to a rotation angle of the holder. The drawing device acquires the drawing data and the angle data of a preceding line segment from the memory, rotates the rotation portion in accordance with the angle data, and draws the object by controlling the movement portion in accordance with the drawing data. The drawing device acquires the drawing data and the angle data of a subsequent line segment continuously subsequent to the preceding line segment, rotates, and draws the object in the same manner as the preceding line segment.