Modifying Cheap Stepper Motor To Be More Powerful (28BYJ-48)

In this video i'm going to modify a 28BYJ-48 stepper motor to work as a bipolar motor and evaluate it's performance against an unmodified motor.

Music from #Uppbeat (free for Creators!):

[paulz]

Isn't it refreshing to watch an educational video with no "pointless verbal garbage". Thanks so much for your time, making this video.

[Roboticlay]

Ooooh yes, I love the buttery smooth voiceover. I'm looking forward to the next one!

[headbanger]

This is a great hack for low budget DIY/hobby. Thanks! I’m amazed you were able to squeeze out such performance from such an old built component. Maybe a video on a cheap way on how to cool them while at top performance? Is there such a thing as thermally conductive silicone tubing? Then one could run a water jacket.

[JoseHernandez-lzvr]

Nice video, congratulations and thanks for it.

I have found that with current limiting at 12V, the modified motor, if we want to keep it stopped but with the coils powered so that it is not possible to move it by hand (it will handle a flap), the voltage chopper makes the motor vibrate. I am using the MP6500, I have ordered a DRV8825 to test as well.
I think there is no solution for this and when it has to be stopped you have to disable the controller and trust that the gearbox prevents the flap from moving.

[ainbrisk]

very cool! thanks for the explanation (and the take apart), very helpful in understanding the motor

[policedog]

Very helpful! Thank you for posting this. For purposes of discussion I wanted to mention there seem to be two versions of these with the same 28BYJ-48 designation - one a 12 Volt and the other is a 5 Volt version. I haven't checked the coils but I assume there is just a different number of turns on the coils. Good job getting the case apart you have to have the perfect size mini screwdriver which I have yet to find in spite of having a collection of 20 of them. edit (I just watched the video again and noticed your video did show the 5V spec and compare to the 12V - I just missed that the first time).

[EcoHamletsUK]

Thanks. That's really helpful. I've just designed and 3D printed a model railway turntable to be powered by a 28BYJ-48, and was a bit concerned it might be underpowered. If it is, I can try your mod, that will hopefully solve the problem without the need to redesign it for a NEMA17 motor.

[sidster]

Very nice Should Increase in Generation also less conflict in flow Great Job

[OutTheGaWoods]

I am new to the use of stepper motors and understanding them. I thank you for your content. I just accidentally found you on YouTube and I’m grateful for that. I have a few questions about heat being generated on a low maintenance project that I am working on and what your suggestions would be, please let me know if you’re willing to help. Thanks again for the video.

[mystixa]

Its true but you can buy them with 3 wires as well. Also increasing the torque on these isnt a great idea as they have enough to break aa tooth in the gearbox as is. I know this from having a 3d printer that used 4 of these motors as extruder motors. A common failure was to have a broken tooth in the gear box.

[noweare]

The 5 volt test, the motor did not seem to sound correct and the shaft did not move smoothly. You might have to drive them at a different frequency to find the sweet spot.

[paranoidzkitszo]

Mine has no curcuit....:( I really don't suggest anyone take apart these unless youplan on not using em after....

[subseany]

Help Me Step Motor I'm Stuck in the washing machine

[larryplatzek]

Thank you for replying good to explain why you did not show running with 5 volts. Hope you have a Great day!

[BritishEngineer]

The construction looks super similar to geared ac synchronous motors

[Rwide]

Nice video! I'm wondering, will this modification make the stepping more reliable when using a a4988 (or similar) stepper driver? I am currently using these motors unmodified with a4988 (yes it works). I do experience a missed step/jitter here and there though. Slowing down the speed doesn't seem to help so perhaps this modification could have a positive effect?

[SrGreck]

Hi there! I really enjoyed your video on the 28byj-48 motor. Do you have the 3D model available for download? I'm interested in creating a new internal reduction for the motor and would find it super useful.

Also, do you know if the sizes in the model are accurate? Any insights would be appreciated!

[lesto]

as you break the connection, you dont use anymore the red cable? you drive directly only the remaining 4 cables?

[valdolandar]

I am thinking of using these motors as syncronous with 5 volts and AC current at 50 hz.

[erwinz]

this motor had 2000 microsteps and, with the hack it has a backlash of 4 degrees.
how much backlash did it had before?
how does this make sense. how can one fight this backlash issue in small steppers..?
or is it simply the price for add on power due to other magnet mode?!