Pages: [1]   Go Down
Author Topic: stepper motor problem  (Read 730 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Newbie
*
Karma: 0
Posts: 6
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I was using easydriver to control a stepper motor and a 9v battery. The motor specs are here in portuguese: http://www.robocore.net/modules.php?name=GR_LojaVirtual&prod=362   

it is refurbished.

9v  and 2A /phase

it was working fine but stopped. I started with theses values:

digitalWrite(x, HIGH);
delayMicroseconds(10); //A
digitalWrite(x, LOW);
delayMicroseconds(300);  // B

Then I tried increasing the delay, 20 microseconds for A and 3000 for B, and it worked for a while. But now the motor doesn't turn anymore. And I can turn it by hand with almost no effort, it wasn't like this before. There's almost no torque anymore.

What I'm doing wrong? Should I buy a new one?

Thanks in advance.
Logged

Offline Offline
Faraday Member
**
Karma: 68
Posts: 2854
The last thing you did is where you should start looking.
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

What are you using for the 9 volt source?
10us,  way to fast!!
Logged

The way you have it in your schematic isn't the same as how you have it wired up! That goes for me too.

Offline Offline
Faraday Member
**
Karma: 68
Posts: 2854
The last thing you did is where you should start looking.
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Also schematic please...
Logged

The way you have it in your schematic isn't the same as how you have it wired up! That goes for me too.

0
Offline Offline
Shannon Member
****
Karma: 221
Posts: 12710
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Not many 9V batteries can supply 200mA, let alone 2A....

That stepper is rated at 2A per phase and 2 ohm winding resistance - therefore it needs 4V, not 9V.

I suspect the 9V is the voltage for bipolar operation (two windings in series).
Logged

[ I won't respond to messages, use the forum please ]

South Texas
Offline Offline
Edison Member
*
Karma: 8
Posts: 1025
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Dead Battery.
Logged

Pages: [1]   Go Up
Jump to: