Special:
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[DAT] (requires LDraw-compatible viewer)
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Subject:
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stepper motor sequence
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 3 Feb 2000 15:50:57 GMT
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Original-From:
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E158 (M.FAZAL) <M.FAZAL@BHAM-EEE-FS4.BHAM.AC.spamlessUK>
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Viewed:
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2143 times
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hi all
i was trying to connect a uni polar stepper motor with the hb. i was using
the stepping sequence given in peter harrison page.
A B C D
1 0 0 0
0 0 1 0
0 1 0 0
0 0 0 1
This sequence means that each coil will be energised one by one. and at no
time will A and B or C and D will be energised at the same time. this works
out fine since A and B are on one motor channel and C and D are on another
motr channel
--------- ----------
A | | C
(+V)------- ---------- (+V)
B | | D
--------- ----------
when both motor channel are off current will flow from the supply through
both coils. this will consume a lot of current. when the first sequence is
applied (i.e. A is ON) the circuit will look like as below
+V-------- ----------
A | | D
(+V)------- ---------- (+V)
B | | C
--------- ----------
thus no current will flow in coil A. but coils B C and D will be on. thus
the actual sequence effectively becomes
A B C D
0 1 1 1
1 1 0 1
1 0 1 1
1 1 1 0
is my analysis correct or am i missing something?
cheers
fazal
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