I bought a 6 wire stepper motor. it has RED-RED-BLACK-BROWN-ORANGE-YELLOW wires. i connect both red on +5v. other 4 on ULN2003. now, in which order should i supply pulse to make it run on one direction? i use embedded C in pic controller. i tried in different order but it oscillates never run in one direction.
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You will need to identify the specific windings in order to determine the correct sequence. Is there a manufacturer name on the case? May I suggest googling "stepper motor cable color code {manufacturer}"?
Here is a good description of **broken link removed** If you look and follow other links on the page, this reference also tells how to identify the coils and their associated color-coded wires.
Look sharp! The sequence should power alternatingly the upper and lower winding pair. So the correct sequence is
e.g.
1000 (ye)
0010 (bn)
0100 (or)
0001 (bk)
Yes it is 7.5 Degree per step Unipolar stepper motor from FDK but the model is obsolete now and not manufactured anymore. The two red wires (One from top coil and one from the bottom coil) are common and rest wires are as sequence as mentioned by "Fvm". The datasheet is not available.
May be its a small project but there are ample members who ask questions like the one you asked..Just to run a stepper motor. Hope your reply will help such members.