Picaxe Stepper Motor Driver For Mac

'Simple Demo stepper mtr unipolor, 1/2 step. '28byj-48 stepper has internal gear reduction, aprox 60:1 ' ' Will use the Lookup/Lookdown methode later 'LOOKUP offset,(data0,data1.dataN),variable 'Offset - is a variable/constant which specifies which data# (0-N) to 'place in Variable. Photoboothtalk.com. ' '4 Nov 2014 Paul ' With delay per step set at 1.28 ms (scoped) it takes about 2 seconds for a complete revolution (1/2 step mode) ' It takes approximatly 510 X 8 half steps for one revolution ' ' Wired to pixaxe 40X2 as follows (thru ULN2003) 'Pin 40(B.7) to Blue wire 'Pin 39(B.6) to Pink wire 'Pin 38(B.5) to Yellow wire 'Pin 37(B.4) to Orange wire 'Clockwise rotation test. Yes, they are cheap and slow, but in full step mode mine seems very predictable.

In full step mode I let it run both directions (1/2 rotation, 180 degrees every 5 sec) for over 12 hours with no accumulated error that I could see on my setup. Of couse this is with no load as shown in the attached picture. Popclip app for mac.

In 1/2 step mode I could not get repeatable results but that may have been a error in my code because during reversal you must start with the same step pattern as you stopped with. Here is the code. If you call 6 RPM livin'. Believe it or not, my video shows the max speed I could somewhat reliably achieve even running this 5V motor at close to 12 volts on full step drive (two coils always on).

Hi, Yes, that motor is well-known on this forum (and generally well-liked). It is unipolar so quite easy to drive, particularly with the included driver board.

It still missed steps occasionally, which shows up pretty obviously in that slotted wheel demo. I can believe that slowing down increases their reliability, but they are pretty glacial to start with. I do teaching and education, and this motor isn't going to wow people and make them aspire to get one.