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View Full Version : Real world stepper motors.,



xxxxxx
04-27-2005, 11:51 PM
Hi,

most of us have used stepper motors for years..., let me 2 say that i have a 1.8 degree step angle, unipolar stepper.

So how many coil do i have in my stepper. dont say 4, If it is 4 then each coil when energized the rotor has to move 360/4 = 90 degree, but it moves 1.8 degree. So do i have 200 coils connected in 4 sets....

10x in advance... waiting for ur reply....


xxxxxxxx

xxxxxx
04-28-2005, 07:20 PM
Hi again,

So the only way is to break the stepper motor and see it... It is really amazing we all had used it for years, but still the working is like a mystery....


xxxxxx

subot_robot
04-28-2005, 11:18 PM
.

subot_robot
04-28-2005, 11:23 PM
Hi
The stepper motors will not have 200 coils. but it will have internal gears to reduce the stepping angle. the 5 wire and 6 wire stepper motor will have 4 coils. I don't know about 4 wire stepper motors.

subot_robot

xxxxxx
04-29-2005, 12:13 AM
Well,

I am talking about simple 5 wire, unipolar stepper motor.......


Ok let us say internal gear reduction :arrow: ...

if 90 degree (Rotor) is reduced into 1.8 degree (Shaft) then we need to have a gear reduction of 50 times....

for instance,
if u rotate a geared dc motor's shaft in hand with a gear reduction of 25 - 30 times, u can feel the shaft's resistance. but we dont feel any such resistance in turning the stepper motor.

But if u turn a stepper motor in hand, u can feel the coging of motor in steps... if it is just a gear reduction then the stepper motor will freely rotate instead of cogging .......

So,....

xxxxxxx

samrat189
04-29-2005, 07:56 AM
hey its not like that have this link, u'll get more than what if i explain...


http://www.sapiensman.com/step_motor/

bye

jack
04-30-2005, 12:23 PM
Hi again,

So the only way is to break the stepper motor and see it...

xxxxxx

I bet a better idea would be to read some book, rather then hammer it down!

rao
04-30-2005, 12:25 PM
Grat link Satish

Thanks a lot

Rao

samrat189
04-30-2005, 04:14 PM
not more than u people's work thanku :D :D

jack
05-03-2005, 11:43 AM
BTW, have you tried this one http://www.cs.uiowa.edu/~jones/step/