Discussion in "Hardware" started by    karkipreeti    Mar 14, 2013.
Thu Mar 14 2013, 11:28 AM
#1
hello

i want to interface stepper motor with 8051.But i don t have information about the pin configuration of the motor. The motor has just a female connector with 6 pins. 2 of them are shorted in connector. But when i tested it with the multimeter, i found that all the pins in the connector are internally shorted. now i am confuse how to interface the motor as all the pins are internally shorted.
Thu Mar 14 2013, 05:33 PM
#2
Whats the motor specification Part # you need to use some driver IC like L298 for current upto 2A






http://onlinetps.com/shop/


[ Edited Thu Mar 14 2013, 05:33 PM ]
Thu Mar 14 2013, 07:05 PM
#3


hello

i want to interface stepper motor with 8051.But i don t have information about the pin configuration of the motor. The motor has just a female connector with 6 pins. 2 of them are shorted in connector. But when i tested it with the multimeter, i found that all the pins in the connector are internally shorted. now i am confuse how to interface the motor as all the pins are internally shorted.

karkipreeti


Two pins are connected,intended to be common supply or earth.

The rest are probably not actually shorted, just low resistance.
Find a way to measure low resistances, then measure the windings.
This will give an idea of what voltage and current is needed to drive the motor.
Fri Mar 15 2013, 08:59 AM
#4
I did not understand how could i find the pin connections. shall i use it randomly to test the pins according to movement??
Actually i have no knowledge of motors,had just started working on it.
i have checked the datasheets. but i did not find the enough information. The ratings are as- Drive Voltage=24v,
Current/Phase=600 ma.i also want toknow that can i use ULN 2803 to drive the motor??
Fri Mar 15 2013, 05:16 PM
#5
What model is the motor ?
Sat Mar 16 2013, 04:44 AM
#6
Stepper motor model-NMB PM 35L-048 HPH7
Sat Mar 16 2013, 12:03 PM
#7
I found this when searched for PM 35L-048


It clearly explains the coil number and so easy to find steps. step angle is 7.5 degrees.
 karkipreeti like this.
Sat Mar 16 2013, 08:45 PM
#8


I found this when searched for PM 35L-048



It clearly explains the coil number and so easy to find steps. step angle is 7.5 degrees.

Ajay Bhargav


That may not be the same motor as it only shows four wires.
This web page says five wires and 5-12 volts.

http://www.robotstorehk.com/motors/motors.html

This image shows there are 6 connectors internally.





[ Edited Sat Mar 16 2013, 08:46 PM ]
Mon Mar 18 2013, 04:46 AM
#9
@Phil, yes 6 connector wire is same as 5 in which common is shorted and comes out on port. I think the datasheet I gave is for bipolar stepper where as he is using a unipolar stepper motor (5/6 wires).

@Karkipreeti, You can take a look at this post of mine, where I explained how to find right stepper motor wiring.

How to find stepper motor connections
 karkipreeti like this.
Thu Mar 21 2013, 05:26 AM
#10
thanks, ajay sir. the link given u was helpful. i found the pin arrangements. they are all in sequence 1-2-5-6, except common pin, which is at 3-4 position.
now i have to interface it with 8051. i have used IC L 293 to drive the motor. But as i power on my system, the motor moves a step forward and then backward and stops. the micro-controller is getting heat up. Does not work like my program, where i want to start motor , when a switch is pressed.
what can be the problem?? is l293 is not able to drive the motor??

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