stepper motor problem!!!

[maham ahmed]

hi every1 ! i was driving a stepper motor ....few days ago the motor was in working condition although there were vibrations in it but it was in working condition....but today when i checked it it is not even rotating on the same program....i have checked properly the internal wires ..all is fine .Then i checked stepper motor through battery method i hope u know the battery method that is just give ground to common and 1 by 1 give 5v to all the wires of motor ..it will take jerk and step....so when i checked this today i was very surprised to observe that at 1 time only 2 wires is taking jerk and step....that two wires are not fixed when i checked it several times the wires which were taking jerk were different.

i dont know what is happened and i am very worried about this problem.what does it mean ?plz help me out

 

[Gryd3]

Maham,
To confirm, what you have found with the battery method is that 2 of the 4-wires work on your initial test. As you kept testing however, you have found that the two wires that work are now different.

With the wires disconnected, can you please measure resistance from common, to each of the 4 leads?

 

[Gryd3]

Back in your old thread, you said you had is running smoothly after putting 5V to the enable pins of your driver RC.
https://www.electronicspoint.com/threads/stepper-motor-is-missing-the-steps.269295/

What changed that caused it to run with vibration?

 

[maham ahmed]

Maham,
To confirm, what you have found with the battery method is that 2 of the 4-wires work on your initial test. As you kept testing however, you have found that the two wires that work are now different.

With the wires disconnected, can you please measure resistance from common, to each of the 4 leads?

yes i have checked the resistance....the res between common with each lead was about 1.5 ohm... and between the leads were half of this resistance

 

[maham ahmed]

Back in your old thread, you said you had is running smoothly after putting 5V to the enable pins of your driver RC.
https://www.electronicspoint.com/threads/stepper-motor-is-missing-the-steps.269295/

What changed that caused it to run with vibration?

yes i have said this but it was my misconception ....i have said on previous post that my motr was missing steps....so the missing steps problem was resolved but vibrations still there.

 

[Gryd3]

yes i have checked the resistance....the res between common with each lead was about 1.5 ohm... and between the leads were half of this resistance

Can you please double-check these measurements?
If common to one lead was 1.5Ω, in theory lead to lead would be 3Ω

 

[Gryd3]

Also, I realize the time of computers allows you to get answers from anywhere 'arshia', but when you post the same question on multiple boards it can really complicate things. You will need to follow many more trains of thought in troubleshooting the same issue, and it's much more difficult for us to help when we don't know what else you are trying to or are told to do from other sites.

(I have also found posts on yahoo and allaboutcircuits.com)

 

[maham ahmed]

Can you please double-check these measurements?
If common to one lead was 1.5Ω, in theory lead to lead would be 3Ω

Can you please double-check these measurements?
If common to one lead was 1.5Ω, in theory lead to lead would be 3Ω

no According to theory the lead to lead res would be half of the res of lead to common res

 

[maham ahmed]

Also, I realize the time of computers allows you to get answers from anywhere 'arshia', but when you post the same question on multiple boards it can really complicate things. You will need to follow many more trains of thought in troubleshooting the same issue, and it's much more difficult for us to help when we don't know what else you are trying to or are told to do from other sites.

(I have also found posts on yahoo and allaboutcircuits.com)

because we can't rely only onn 1 forum as answers in any forum are not always correct...people just share their experis and opinions.

 

[(*steve*)]

no According to theory the lead to lead res would be half of the res of lead to common res

Interesting theory.

ahmed, I propose that you stop posting here until or unless you find your problem cannot be solved elsewhere. It will be more economical on your time and ours. As Gryd3 points out, fault finding is best done by following a structured path, not by going scatter-gun at the problem.

Find someone you trust and follow their advice to try to track down the problem.