3D Printer Auto-Leveling Probe With Photoelectric Detection
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Solution Overview
Problem
Current 3D printing technologies face challenges in achieving accurate and efficient leveling of the printing platform relative to the print nozzle, with existing methods being cumbersome, costly, and requiring complex assemblies, which affects the precision and success of the printing process.
Innovation Solution
An automatic leveling device for 3D printers is introduced, featuring a photoelectric switch, electromagnetic assembly, and a probe assembly that simplifies the leveling process by using a sliding probe with an elastic piece and permanent magnet, reducing manufacturing complexity and cost, while ensuring high repeatability and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual adjusting screws are used to adjust the levelness of the printing platform, then the leveling can be achieved, but the operation becomes cumbersome and the accuracy is insufficient
Solution Approach 1:
The patent replaces the manual mechanical adjusting screw system with an automatic probe-based detection system combined with electromagnetic actuation. The probe assembly with electromagnetic component automatically detects platform levelness and drives the printing platform to adjust, eliminating manual operation while improving accuracy through precise sensor feedback.
2Measurement precision
If a probe with electromagnetic coils and plungers is used for leveling detection, then the leveling can be detected, but the device requires high assembly requirements, has poor anti-interference immunity, and high cost
Solution Approach 1:
The patent extracts the essential function of probe detection from the complex electromagnetic coil and plunger assembly. It uses a simplified probe structure that extends and retracts to detect platform contact, combining it with a photoelectric switch for signal detection. This extraction maintains detection accuracy while dramatically reducing assembly complexity and improving anti-interference immunity.
3Ease of operation
If a steering gear with micro switch is used for leveling adjustment, then the leveling can be adjusted, but an extra steering gear is necessary which complicates the printer nozzle assembly
Solution Approach 1:
The patent merges the leveling detection and adjustment functions into an integrated probe assembly that is directly mounted on the printing platform. The probe assembly combines the detection probe, electromagnetic component, and photoelectric switch into a unified structure, eliminating the need for separate steering gear and micro switch assemblies, thereby simplifying the overall printer nozzle assembly.
4Measurement precision
If an inductance sensor is used for leveling adjustment, then the leveling can be detected, but the device has a large volume and takes up the installation space of the printer nozzle
Solution Approach 1:
The patent replaces the bulky inductance sensor with a compact photoelectric switch-based detection system. The photoelectric switch uses light transmission through a photosensitive groove to detect probe position, achieving the same leveling detection function with significantly reduced volume, allowing it to fit within the constrained installation space of the printer nozzle assembly.
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
The automatic leveling device enables fast and accurate leveling of the printing platform, improving the overall printing accuracy without requiring complex circuits or software cooperation, and simplifies the assembly and maintenance of the 3D printer.
Implementation Method 1
a photoelectric switch defining a photosensitive groove; one end of the probe assembly engaged in the photosensitive groove
Implementation Method 2
an electromagnetic component defining a sliding hole; the electromagnetic assembly can drive the probe assembly to move
Data Source
AI summary
An automatic leveling device of a 3D printer, and a 3D printer is provided. The automatic leveling device includes a photoelectric switch, an electromagnetic assembly and a probe assembly. The photoelectric switch is arranged in a housing and defines a photosensitive groove. The electromagnetic assembly is arranged in the housing and defines a sliding hole. The probe assembly is slidably engaged in the sliding hole, and an end of the probe assembly is engaged in the photosensitive groove. The electromagnetic assembly is capable of driving the probe assembly to make the end of the probe assembly move out of the photosensitive groove. The automatic leveling device has the advantages of simple structure, low manufacturing difficulty, low production cost, simple and stable leveling mode, high detection repetition accuracy and no complex circuit and software cooperation.