Hi friends, stepper motor and servo tied. But the servo does not move. In the same way the stepper motor vibrates but does not turn. Why could it be?

Sana please don't hijack other people's threads - start your own thread with a descriptive title, and your question in it.

Onuryuzak, there are literally a thousand reasons this could be, and you haven't given us any infomation at all that might help. What kind of machine have you got, what kind of arduino, what kind of driver, what kind of firmware, where did you get the firmware from, what modifications have you made to the firmware, have you tested the hardware with other firmware to make sure it works (motors and servo), what errors or messages do you see in the console when you connect the machine, is the controller receiving responses from the machine, is the machine on, how are you powering the machine. What do you do to test it, what do you expect to happen, what actually happens. Come on, throw us a bone here!

Quote from sandy on April 29, 2017, 18:29
Sana please don't hijack other people's threads - start your own thread with a descriptive title, and your question in it.

Onuryuzak, there are literally a thousand reasons this could be, and you haven't given us any infomation at all that might help. What kind of machine have you got, what kind of arduino, what kind of driver, what kind of firmware, where did you get the firmware from, what modifications have you made to the firmware, have you tested the hardware with other firmware to make sure it works (motors and servo), what errors or messages do you see in the console when you connect the machine, is the controller receiving responses from the machine, is the machine on, how are you powering the machine. What do you do to test it, what do you expect to happen, what actually happens. Come on, throw us a bone here!

Nema 23 I am using a 0.9deg / step motor. I use Arduino uno. I feed from the outside with 12V. I use AF Motor shield. I am using Processing 2.2.1.

It works without any inconvenience when I run the servio with normal code. But in processing I do not react at all when I call a pen lift.

Onuryuzak I'm sorry to seem impatient, or demanding, but you really need to give a bit more.

What happens when you upload your machine spec?
Look at the console (in the Processing IDE) when you send the pen lift / pen drop commands. What do you see?
Look at the console and reset the arduino. What do you see?

How could i tell, when I don't know what kind of motors you are using?

Your power supply must be matched to your motors. With 0.5amp PSU, your motors should draw less than 250mA each.

I'm afraid I'm about to give up on this, because you don't seem able to understand my questions or describe your problem, very sorry.

The very first google result for "Nema 23 KP56KM1-014" lists data on this motor.
http://klinikrobot.com/product/retired-products/retired-products-by-request-kp56km1-014-stepper-motor.html

Literally the least I could do.

This suggests that these motors draw 1A each. You have not said which motorshield you're using (there are two kinds of Adafruit shield), and they have different capabilities. The old Adafruit motorshield v1, with L293D drivers could supply 600mA per motor. The v2 shield can supply 1.2A per motor. So this does make a difference.

Your motors will try to draw 2A. Your PSU can't supply that much. I don't know about your motorshield because you haven't been clear about which one you have.

I'm out, I'm sorry.

Ok Alexandre:
What kind of firmware? Where did you get the firmware from? Have you made any modifications to the firmware?

By default, the polargraph_server_a1 firmware is configured to use an Adafruit v1 motorshield.

https://github.com/euphy/polargraph_server_a1/blob/master/polargraph_server_a1.ino#L52-L66

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