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Topic: L298N and problems with steppin motor (Read 1 time) previous topic - next topic

shimidan

Hi! I'm new to forum and electronic.
I've searched and unfortunately, I couldn't find a problem excatelly like me. Briefly, I connected UNO, Keypad,  LCD 1602 (with connection shield), L298N driver and a small minebua stepping motor. At early tests (just a few second) all thing was good but when i assembled them, use a good 12V 1.5 A wall adaptor and connect 5V of the driver to VIN of UNO, No! the motor works and suddenly doesn't and suddenly do. The heat sink is hot!
Four scenarios:
  • The 12 V (all jumpers leave in place) is high! (Rejected by me)
  • Iinternal short break of the L298N. (How can i check it?)
  • Incorrect  driver! (See the later passage)
  • Need fan . (Rejected by me)

I've read some where that this old IC isn't efficient, the output current is just 500 mA not 1-2 A. I read a MOSEFT can work without heat sink up to 1.5 A.

What is the problem? If i must change the driver, Which is good for me? (cheap, easy to run and steady for long time works). Please guide me.

outsider

#1
Dec 02, 2017, 08:59 am Last Edit: Dec 02, 2017, 09:02 am by outsider
Quote
a small minebua stepping motor.
What are the voltage and current requirements for this motor. Can you provide a datasheet link?
UNO VIN pin needs at least 7V (up to 12) to get 5V from regulator, if your 5V supply is regulated and stable, connect to 5V pin.
Quote
The heat sink is hot!
Heat sink on what?

shimidan

What are the voltage and current requirements for this motor. Can you provide a datasheet link?
UNO VIN pin needs at least 7V (up to 12) to get 5V from regulator, if your 5V supply is regulated and stable, connect to 5V pin.Heat sink on what?
http://www.eminebea.com/en/engineering_info/rotary/steppingmotor/hybridmotor/cat-1/002.shtml

[quote
Heat sink on what?
[/quote]
I use L298N driver not just an IC. heat sink on the IC.
http://www.eshop.kharazmi.co/images/L298StepperController_thumb_cz9mv2by.jpg

TomGeorge

Hi,
Your link to the stepper specs tells us nothing that we need.
No voltage rating.
No current rating.

Can you post the make and model number of the stepper.

Thanks.. Tom.. :)
Everything runs on smoke, let the smoke out, it stops running....

shimidan

#4
Dec 02, 2017, 12:30 pm Last Edit: Dec 02, 2017, 12:35 pm by shimidan
Sorry, I don't know why i couldn't find this page. Please read all properties here. (http://www.eminebea.com/en/product/rotary/steppingmotor/hybrid/standard/17pm-k.shtml)



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What about A4988? It is very cheap here less than 2 $!

TomGeorge

HI,
Okay getting closer, WHICH MODEL NUMBER...

Tom....... :o :o :o
Everything runs on smoke, let the smoke out, it stops running....

shimidan

I don't remember the exact model number. I must see it hours later. But i know it is removed from original site. . I guess the current is 1 A.

outsider

Do you have an ohmmeter to measure the winding resistance? That would help ID the motor you have, also, all those motors look like low impedance types, so L298 is not suitable, you need a chopper drive with adjustable current limit.

MarkT

#8
Dec 02, 2017, 04:44 pm Last Edit: Dec 02, 2017, 04:45 pm by MarkT
Hi,
Your link to the stepper specs tells us nothing that we need.
No voltage rating.
No current rating.

Can you post the make and model number of the stepper.

Thanks.. Tom.. :)
Steppers don't have a voltage rating, just current, inductance, resistance, steps/rev, hold-in-torque.
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

TomGeorge

Hi,
Quote
No! the motor works and suddenly doesn't and suddenly do. The heat sink is hot! 
You have the stepper with your project, does it have anything written on it?

Tom... :) :o
Everything runs on smoke, let the smoke out, it stops running....

Robin2

#10
Dec 02, 2017, 06:43 pm Last Edit: Dec 02, 2017, 06:44 pm by Robin2
These links may help
Stepper Motor Basics
Simple Stepper Code

An L298 is a poor choice for driving a stepper motor.


...R
Two or three hours spent thinking and reading documentation solves most programming problems.

shimidan


Robin2

Two or three hours spent thinking and reading documentation solves most programming problems.

shimidan

#13
Dec 03, 2017, 11:21 am Last Edit: Dec 04, 2017, 07:14 am by shimidan
It's in my link - read it.

...R
Thanks. very useful. Actually, and before reading this post, I went to down town and bought a A4988 (main chip probably allegro). I'll test it.

I found some other drivers like tb6612fng and drv8825.

shimidan

#14
Dec 04, 2017, 07:19 am Last Edit: Dec 04, 2017, 08:47 am by shimidan
Model of my motor.


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I got a problem like a4988 stepper..., with my new a4988. I set VDD and VIN incorrectly and then i correct them. All grounds are connected together.

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