3D Printer Detection Device for Precision Nozzle Positioning
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Solution Overview
Problem
3D printers, especially FDM 3D printers, face challenges in achieving high precision due to the sensitivity of position detectors, which can be influenced by external environmental factors, limiting the size of the piezoelectric ceramic sheets used.
Innovation Solution
The integration of a detection device in the 3D printer that includes a piezoelectric ceramic sheet and a position detector. When the nozzle approaches the carrier, the position detector sends an approaching signal, and the piezoelectric ceramic sheet generates a vibration signal upon contact, allowing for accurate detection of real vibrations and reducing external influence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the size of the piezoelectric ceramic sheet is increased to meet detection accuracy requirements for larger print objects, then the detection coverage and accuracy for large objects is improved, but the sheet becomes more sensitive to external environmental factors causing loss of accuracy
Solution Approach 1:
The patent combines the position detector and piezoelectric ceramic sheet into an integrated detection device. The position detector identifies the approaching signal when the nozzle nears the carrier, while the piezoelectric ceramic sheet detects the contact vibration signal. This merging allows the system to use larger piezoelectric sheets for better coverage without suffering from their increased environmental sensitivity, as the position detector provides contextual information to distinguish real contact signals from environmental noise.
2Measurement precision
If a position detector with high sensitivity is used to achieve high precision printing, then the detection accuracy is improved, but the detector becomes more susceptible to external environmental influences
Solution Approach 1:
The system uses feedback from two detection signals: the approaching signal from the position detector and the vibration signal from the piezoelectric ceramic sheet. The control unit processes both signals together to confirm actual contact between the nozzle and carrier. This feedback mechanism allows the system to maintain high sensitivity for accurate positioning while filtering out false signals caused by environmental factors, as both detectors must confirm the same event.
3Area of stationary object
If the piezoelectric ceramic sheet is made larger to accommodate larger print objects, then the detection coverage is improved, but the accuracy is compromised due to increased environmental sensitivity
Solution Approach 1:
By merging the position detector and piezoelectric ceramic sheet into a coordinated detection system, the patent enables the use of larger piezoelectric sheets to cover larger print areas while maintaining accuracy. The position detector provides spatial context about nozzle position, which helps distinguish valid contact signals from environmental noise on larger sheets, thus preserving detection accuracy across extended areas.
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
This solution enhances the accuracy of detection in 3D printing by minimizing external environmental influences on the piezoelectric ceramic sheet, allowing for larger sheets to be used without compromising precision, and enabling the detection device to meet the accuracy requirements of various print sizes.
Implementation Method 1
the piezoelectric ceramic sheet generates a vibration signal when the nozzle contacts the carrier
Data Source
AI summary
A 3D printer includes a frame, a carrier, a nozzle and a detection device. The carrier is fixed to the frame. The nozzle is movably disposed on the frame. The detection device includes a piezoelectric ceramic sheet and a position detector. The piezoelectric ceramic sheet is in contact with the carrier. The position detector is disposed on the nozzle.