I am using Arduino +L298N + stepper motor to test a 17HS4401 motor with the sketch attached.
The motor runs well for a while and then feels difficult to run, seems there is a very large force? and a large vibration.
what's wrong? can be the L298N board too hot? input V=7.5V.
There is a 10K pot input to A0.

 

Does how long it runs depend on the pot setting?

 

Does how long it runs depend on the pot setting?

can run well for 1 minute? no matter hot the pot set.
Thanks

 

Does the L298 get hot - too hot to keep your finger on?
Does it have a heatsink?

 

If you reset the arduino does set off again for another minute, or do you have to leave it for a while before it will run again?

 

Does the L298 get hot - too hot to keep your finger on?
Does it have a heatsink?

Yes, too hot to touch.
and the motor doesn't run when the Vin=5.5V.
Thanks

 

If you reset the arduino does set off again for another minute, or do you have to leave it for a while before it will run again?

No.
reset the Arduino doesn't effect any thing.
Thanks

 

Are you using that L298 board in the picture - with that nice big heatsink?

 

Which model of motor are you using?

 

Are you using that L298 board in the picture - with that nice big heatsink?

Yes.
Thanks

 

Which model of motor are you using?

17HS4401.
Thanks

 

Does the heatsink get too hot to touch or only the chip?

 

Does the heatsink get too hot to touch or only the chip?

heatsink and chip all hot.
thanks

 

The L298 is an old design, and you can do a lot better than those.
It does sound like it is overloading.
What current is the motor drawing?

There are others to look at..

These and similar are used in 3D printers .

And these below are a lot higher power.

 

What current is the motor drawing?

From the motor datasheet, the coil resistance is 1.5Ω so the current will be about 3A. The L298 is rated to 4A but it all depends on the size of the heatsink and its ability to get rid of the heat.

 

The L298 is an old design,

Yeah, that one should be put to rest with Audioguru's favorite op amp the 741.

 

The L298 is an old design, and you can do a lot better than those.
It does sound like it is overloading.
What current is the motor drawing?

There are others to look at..
View attachment 207790
These and similar are used in 3D printers .

And these below are a lot higher power.
View attachment 207791

Ya, I'll change the driver for my project, for the testing only now, I hooked a 10Ω / 10W Power resistance on each coil of the motor, seems OK now.

BTW. any suggestion on how to hook 4 stepper motors to a MEGA2560?

Thanks

 

BTW. any suggestion on how to hook 4 stepper motors to a MEGA2560?

It may almost be worth while looking at a low end 3D printer board. Most off these are Arduino MEGA2560 based.
Going up market to an ARM based board could also be an option.

Just a RAMPS board plugged into an Arduino MEGA2560 is what my big 3D printer uses. The other two printers have custom boards that are functionally the same.

 

It may almost be worth while looking at a low end 3D printer board. Most off these are Arduino MEGA2560 based.
Going up market to an ARM based board could also be an option.

Just a RAMPS board plugged into an Arduino MEGA2560 is what my big 3D printer uses. The other two printers have custom boards that are functionally the same.

Thanks.
Actually I have many sensors and switches, I just post a new topic.
Best.

 

heatsink and chip all hot.
thanks

Try to put a relative small value PWM signal on the Mot A Enable and Mot B Enable which will limit the current drawn by the motor. Normally those lines are jumpered to continuous enabled.