SeanHatch
New Member
Hello,
I registered way back in the day! This place is huge now!
Anyway, I'm doing some stepper motor stuff, I don't have time at the moment to read all the theory I'd like to, so I'm just gonna take your word for it .
Some of you are more versed than me, but I've never seen a stepper like this one. 200 ohms/coil, and the voltage is rated at 12V.
1.) If I de-energize all the coils, is the stepper guaranteed to stay where it was most recently moved to? Or must I leave the coils energized?
2.) I think I understand the energization orderings, but I'm not sure of the particulars. Should one coil be energized exactly as the other is de-energized? Should there be down-time here?
3.) In the same vein, what pulse length should I apply? I suspect this isn't a simple answer. I get excited when I see the rotor spinning, but I think it may not be reliable.
4.) If I take a scope and watch the pulses at the stepper input, they are UGLY. I suspect this is abnormal, how can I fix it?
5.) These steppers are used to control a spring-loaded XYZ stage for which the controller is long gone. The controller must have had some tricks up its sleeve, because I have to exceed the voltage an current ratings of the stepper to get the thing to move. Any ideas here?
Quite long-winded. Hope someone can help me out with a few of these, thanks a lot!
I registered way back in the day! This place is huge now!
Anyway, I'm doing some stepper motor stuff, I don't have time at the moment to read all the theory I'd like to, so I'm just gonna take your word for it .
Some of you are more versed than me, but I've never seen a stepper like this one. 200 ohms/coil, and the voltage is rated at 12V.
1.) If I de-energize all the coils, is the stepper guaranteed to stay where it was most recently moved to? Or must I leave the coils energized?
2.) I think I understand the energization orderings, but I'm not sure of the particulars. Should one coil be energized exactly as the other is de-energized? Should there be down-time here?
3.) In the same vein, what pulse length should I apply? I suspect this isn't a simple answer. I get excited when I see the rotor spinning, but I think it may not be reliable.
4.) If I take a scope and watch the pulses at the stepper input, they are UGLY. I suspect this is abnormal, how can I fix it?
5.) These steppers are used to control a spring-loaded XYZ stage for which the controller is long gone. The controller must have had some tricks up its sleeve, because I have to exceed the voltage an current ratings of the stepper to get the thing to move. Any ideas here?
Quite long-winded. Hope someone can help me out with a few of these, thanks a lot!