Hi, I decided to have another go at controlling a stepper motor again the other day. Its the first time ive given it much thought since i was about 10 and now i know about PICs i managed to link a stepper motor through a ULN...something driver chip into a PIC. I was quite impressed with the results but i feel like it should be better. The motor ive been testing with is a 6 wire type. I told the PIC to turn the 4 outputs on and off in sequence and the motor worked. The problem i have is that i cant make it move fast. If i try to speed it up the PIC chip works faster than the motor and sometimes it even runs backwards.
Should stepper motors be connected to PICs using a proper stepper motor driver circuit or can it be done how ive done it here? The motor i have is really old and aparently its a 15 degree one. I was thinking about buying some bigger motors which are 1.8 degrees. Would my circuit work better with newer motors or do i need the driver circuit?
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