The bipolar stepper motor is a two-phase brushless motor which has two coils (windings), this motor has 4 wires (2 wires for each coil). The other type is the unipolar stepper motor, it is 4-phase brushless motor which has 5 or 6 wires. ( or if a pre-made version exists ) for 5-phase (10wire) stepper motors?
Hi every one I've tried to replicate L297-driven-L298 scheme for my 5 phase oriental motor pentagon stepper motor, but I've find L297 only use for 4 wire motors, hence I've decide to use an atmega16 for controlling the stepper motor, I've tied 4 L298 input together as well as 4 output to control each winding with single L298 (2+2 amper for each winding), I've tied currents sense A & B for the another input to my microcontroller. My plan is following the oriental motor full step pattern table to energize the winding, in each step I read analogue input of currents sense related to its L298 phase and chopped whether is exceed from MAX Currents in the loop, then go to next step such as following code.
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Interesting you should ask this. I've been working a lot with stepper motors and especially the oriental pk series. The sad truth is 5-phase stepper motors aren't really used anymore, due to being a pain to work with. This being said you'll have to figure out the grey code required for the stepper motor to step. You'll be better off with other stepper motors. Also remember the arduino cannot power the stepper motors directly!
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You will end up drawing too many amps and essentially shorting out. The stepper motor should have the nominal amps and winding resistance written on the back of it.
If you really are committed to this, you will need to build a circuit using the measured winding resistance between each two terminals - that provides the proper amperage to the motor for a given voltage. You'll need to get your hands on a lot of high amp diodes and high wattage, low resistance resistors. This way you can use a common 12 volt power supply to power a motor that itself would need 1.5 volts with 1.5 amps. There may also be some age old drivers out there, but you'll still need all the diodes unless you want to risk dealing with inductive spikes. Many thanks for your reply. Haha Believe you me, I have found out that they are a pain, alright. Even before any wiring.
I am worrying about finding the right voltage and currents, and I can't find datasheets for this model at all. I'm using drivers for it, alright. I have some uln2003A chips, and I also have some of the giant block drivers that are made for it, but they are ~120V AC, and that is a problem for me, as the power supplies we have are 24V.
It's part of a college project, and my insistence on using them is due to wanting to solve the problem rather than avoid it, but I'm getting very stressed, and it isn't worth it. I may have to machine new parts to accommodate new motors, but I reckon this is an acceptable trade-off • • • • •. I don't think that library is going to cut it, if you were going to use those motors i think you'd have to code the pulse sequence manually. Or rewrite the library. Bit of digging looks like the SI-7510 is the way to go, but apparently they're hard to find. I would suspect if you factored in the time to buy or create a driver and/or code to run it (with the possiblity of nuking everything because you dont have the specs) vs buying newer steppers, drivers and machining mounts you'd find the later much more cost and time effective • • • •.