- v1.0: Automated 3D magnetic flux density mapping system.
- v2.0: Recents updates from the MRI4ALL Hackathon in NYC.
- generalized 3D mapping procedure (cube, sphere, surface of sphere)
- mapping permanent magnet constructions, passive shims, or 3 axis switched gradient coils (data included)
- Ubuntu 20.04 / Windows 10 or 11
- Python 3 or higher (very easy setup with PyCharm and relevant libraries)
- Arduino UNO Rev3: https://store.arduino.cc/usa/arduino-uno-rev3
- Arduino gShield: https://synthetos.com/project/grblshield
- Any 3D CNC rail set up or 3D printer gantry
- v1.0: Shapeoko 2 gantry
- v2.0: MRI4ALL hackathon used 3x, 30 cm linear CNC stages attached perpendicularly.
- Probe
- Metrolab THM1176 used here (USB connection).
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Install single trigger code for the THM1176 probe (https://github.com/Hyperfine/pyTHM1176/tree/cedh/single_trig/)
- place all 'pyTHM1176' subdirectory files into the 3DFM folder.
- read pyTHM1176 notes (must have correct drivers installed using Zadig)
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Flash GRBL 1.1h (i.e. the *.hex file) to the Arduino UNO.
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Change 's = serial.Serial('COM8', 115200)' of the "measure_table.py" code to match your Arduino UNO port.
- In Windows, use Device Manager to determine COM port number.
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Power ON the Arduino + gShield using a 24 V power supply unit
- connect probe USB
- connect CNC USB
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Choose the path of points you want to measure.
- change the path for input table name ("
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Read through comments in "measure_table.py" and make changes before running code.
- use 'rewind.py' to move probe without measurements
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Hit the play button.
- v1.0 code is still included.
- 3DFM.py will map in a zig-zag pattern over a defined volume.
- default mapping range is 13.5 cm x 13.5 cm x 1 cm in steps of 3 mm x 3 mm x 1 mm.
- GUI