12/07/2018 at 14:13 •
PCB stepper motor has now officially been certified as open source hardware by the
Open Source Hardware Association.
10/16/2018 at 12:44 •
It is time for new coil board
- better coil shape
- better coil connection
Hamburger structure with 3 wheels is very reliable, precise aligned and use all magnetic field from both sides. also speed and temperature at 2,5V is usable for long time operation
09/14/2018 at 19:11 •
I have try add some speed .... at 2,5V boards have acceptable temperature
09/07/2018 at 20:19 •
I received new coils ... I can just say older are better, but this new are good as simple stepper demonstrator,
12 steps per rotation, board is simple, working almost without heat :)
07/28/2018 at 20:41 •
to reduce cost I am try maximize space on 4-layer board
Also I separating to 4layer coil board + bearing board with driving demonstrator
4 coils with about 80 turns (hand painted), only 3 magnets 10mm or 5mm
Also some coil variants, ordered in OSH park great 4 layer service.
05/06/2018 at 20:08 •
Finaly I get second bearing ...now is motor assembled to final hamburger structure.
I add 2 wheels with magnets to outer side, significantly improve torque.
Check run video !!!
- header detail
-Rim detail ... inner wheel is smaller
04/18/2018 at 11:55 •
04/03/2018 at 08:23 •
stepper motor support bipolar and unipolar mode, but there is no high current driver for unipolar mode
04/02/2018 at 14:28 •
This is experimental redesign first board
but on 0.8mm 2oz board
2 layer board of 1.30 x 1.18 inches (33.0 x 29.9mm)
3 boards will cost $7.65
04/02/2018 at 14:18 •
In my life it is first 4 layers design
10 turns per layer 2 coils in series
4 layer board of 1.35 x 1.26 inches (34.3 x 32.1mm)
3 boards will cost $17.00