[Translation] PCB replaces two linear motors
The proposed design shows how limitless the possibilities of two rather old inventions are - the printing coil and the linear motor. One board replaces two such engines at once. Put a magnet on it and it will move in two-dimensional space. Put a few - they will move synchronously. New electronics will not have to develop, existing stepper motor drivers will fit.
What is required to repeat the design:
- board (100x100x0.6 mm, files here )
- four N52 neodymium alloy magnets with a diameter of 2 mm, interconnected as shown in the CCDT
- two 4-pin stepper motor drivers
- nothing else (controversial statement, “porridge from an ax” will ultimately be necessary)
Feedback is possible using the camera or Hall sensors under the board. RFID/NFC can be placed in the moving part and you can exchange data with it from the fixed part. You can force several magnets to move parallel to each other, or you can divide the board into areas with different sets of printed coils to make several magnets move independently of each other.
The existing version of the 0.6 mm board turned out to be quite thick, so the upper layer coils act on the magnet less than the lower layer coils. That is, according to “X” and “Y-card”, such a board will push the magnet with different efforts. The author plans to fix this by making the board flexible — it is much thinner.
Look at the board from two sides, how simple it is:
The conductors on one side are perpendicular to the conductors on the other. Eight pins, four per driver. And that's it.
Experienced one-sided version of the board
, moves the magnets in one-dimensional space:
Another experimental version
with a different configuration of printed reels, already two-dimensional:
And there is also a board with coils for moving the magnets around the circumference
From the translator. It is advisable to apply a film that protects against abrasion varnish and conductors. And using the board not as an engine, but as a generator, you can get a mouse without buttons, inside which there is no electronics.
Source text: [Translation] PCB replaces two linear motors