Current Control And Pulse Control

You say I win, but your language leaves it open as to whether you are wrong. "his professor's idea" sounds like you still think you are right.

By current control stepper motor never become a motor and it does require phase step sequence for which stepper motor is known for.

Micro stepping does require continuous current control waveform simultaneous on two or more phases with phase shift and then it works like a DC motor to some extent under phase to phase current control for micro stepping and that gives much better control. Phase control used in micro stepping is far superior and current here is dynamic for sine wave phase shifted waveforms.

There is no question of being right and wrong here. Understanding of an answer makes all difference. This person has consulted his teacher and that is the answer perhaps teacher was looking for.

As stepper motor has inductance in coils and current control is better way to operate than voltage waveform in stepping, your answer is right. It is not due to hold current, but due to superior power injection by current control stepping waveform makes it better performer.

Not sure what you mean by "stepper motor never become a motor", sounds contradictory.

In fact you may chose to use microstepping or not with what is often referred to as a chopper drive (PWM current control). You can still run standard whole step or half step sequences. I've done it many times on high speed controllers running in excess of 2000 whole steps per second.

Thanks for your comments.

hold current is a static actuator action and not a motor action. motor action means motion.

Now we are really "splitting hairs". I guess you imply that when a motor isn't turning it is not a motor. That would make it an electromagnetically operated static torquing device, nice. I suppose by the same logic, when a light bulb isn't lighting, it isn't a light bulb, it's just a bulb. Very nice.

Yes, when bulb is not glowing then it is only glass and metal. Only shop owner call them by name but when you use them and you know what they are.

I know that you will not stop so i stop all this and let others move on to more serious and valuable info. You win. OK.

If you were joking, great joke.

If you weren't joking, then you are going down too far in detail for all of us.

We do see your point, but your point, although accurate, is very unhelpful to the question I feel......

Apologies if you feel attacked, but I was really only doing a reality cheack. Nothing more, nothing less!!

You should take the views of rcapper. He is smarter.

I don't believe so.......you got taken in with the flashing blue lights and the buzzer!!!

I think it is in order to give Shyam a break. Perhaps English is not his first language. I have come across Engineering text books written by some Indian professors and technologists and they are completely incomprehensible too. And to my surprise, they are very popular with the students there.

You have no right to comment on people of any nation like this publicly. If it is incomprehensible for you thats okay..keep that upto you only.. Similarly Indians face problem to get Canadian Authors also or any other nation people.

Also language is only a means to give a vent to your views and nothing else..

Oops...............I did not mean to..............!

I really appreciate comments by people and for sure my English is very funny for me also. My wife who know more than 10 Languages also says that my languages are funny.

I also like the reasoning of most of the engineers around and I really appreciate their smartness. I will like this from anyone in India also but here people get offended easily.

I care for young knowledge and I do read their comment and to my surprise they take lots of efforts in getting to what they say. It is not an easy thing to do. Most of the people on the forums are close to my heart for this reason.

When I say, you win means I like their thinking as well and not asking any one to quit discussion. I often get busy with my work as I need to earn millions of dollars to let my employees have salary and projects have to move on and that is merely time pressure on me.

I can easily accept that many engineers are smarter here and in fact truly they are so. Will I get any pleasure in knowing that young generation is less smarter? After all knowledge is generating better knowledge in time and it should be that way.

We can close this part and let everyone move on to pure and helpful discussion. I like all of you so it remains at that point for good.

Good reply Shyam! I do not intend to offend any body. I guess I would naturally struggle to explain myself if I tried doing it in some other language than mine.

Good idea.