Proceedure to correct Uni-polar Stepper wiring errors
LoopyByteloose
Posts: 12,537
Hi,
I have two steppers that are set up with a UNL2803.·
When I hook up a bank of 4 leds to the outputs, the sequence is visually correct.
But when I hook up the steppers, they merely jitter back and forth.
Since my documentation is in Chinese and does NOT have coil 1, coil 2, coil 3, coil 4; I have been trying to reverse engineer.
There is a listing of A, A, B, B: but I cannot seem to sort that into a proper sequence.· I belive that I presumed it would be A, B, A, B.
Is that a good sequence?
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
"When all think alike, no one is thinking very much.' - Walter Lippmann (1889-1974)
······································································ Warm regards,····· G. Herzog [noparse][[/noparse]·黃鶴 ]·in Taiwan
I have two steppers that are set up with a UNL2803.·
When I hook up a bank of 4 leds to the outputs, the sequence is visually correct.
But when I hook up the steppers, they merely jitter back and forth.
Since my documentation is in Chinese and does NOT have coil 1, coil 2, coil 3, coil 4; I have been trying to reverse engineer.
There is a listing of A, A, B, B: but I cannot seem to sort that into a proper sequence.· I belive that I presumed it would be A, B, A, B.
Is that a good sequence?
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
"When all think alike, no one is thinking very much.' - Walter Lippmann (1889-1974)
······································································ Warm regards,····· G. Herzog [noparse][[/noparse]·黃鶴 ]·in Taiwan
Comments
·· Interestingly enough it depends on the code and how the pulses are output...Or you could adjust that to the wiring although it wouldn't be as intuitive.· I would try A, A, B, B.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Chris Savage
Parallax Tech Support
csavage@parallax.com
Your sequence is the right one. It really took a quite of bit of searching to find it via Google.
After I verified everything, I found the documentation was still no good and had to just fiddle with swapping wires.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
"When all think alike, no one is thinking very much.' - Walter Lippmann (1889-1974)
······································································ Warm regards,····· G. Herzog [noparse][[/noparse]·黃鶴 ]·in Taiwan