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Topic: Self balancing robot using NEMA 17 stepper motors (Read 1 time)previous topic - next topic

a9n1s

Feb 19, 2018, 09:11 am
Hi!
I'm working on a self balancing robot project.
I have two NEMA 17 motors and I was wondering if they are powerful enough for this project.

These are the specs:

Model Number:          17HS13-0404S1
Nominal Voltage:       12  Volts
Current Rating:          0.4  Amps
Wattage                  4.8  Watts
Coil Resistance:     30  Ohm
Holding Torque:    26 Ncm
Inductance:           37 mH

Any help/advice will be greatly appreciated!

a9n1s

#1
Feb 19, 2018, 09:35 am
Hi!
I'm working on a self balancing robot project.
I have two NEMA 17 motors and I was wondering if they are powerful enough for this project.

These are the specs:

Model Number:          17HS13-0404S1
Nominal Voltage:       12  Volts
Current Rating:          0.4  Amps
Wattage                  4.8  Watts
Coil Resistance:     30  Ohm
Holding Torque:    26 Ncm
Inductance:           37 mH

Any help/advice will be greatly appreciated!

Robin2

#2
Feb 19, 2018, 10:35 am
How much torque is required to keep the robot upright?

There is a simple idea for measuring torque in Stepper Motor Basics but it may be difficult to apply it to a robot.

Trial and error is required, I suspect. Or finding a similar robot on the internet that you could learn from.

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

ezequielandrush

#3
Feb 19, 2018, 01:50 pm
hello!

You say the motors have 26 Ncm  of holding torque. It means that at a distance of 1 cm from the motor axis It can hold a counter force of 26 Newtons (2.5 kilograms aprox). The torque is halved as the distance is doubled, so a 2 cm it will be 1,25 Kg and at 4cm 0.625 kg.

I guess you'll have to take some weight measures.

I hope I have helped

Zeke

a9n1s

#6
Feb 19, 2018, 02:50 pm
Thanks for the help, Zeke!

vinceherman, I'm new to this forum. Is there a problem with posting the same question in 2 different places? If there is, I apologize.

vinceherman

#7
Feb 19, 2018, 04:33 pmLast Edit: Feb 19, 2018, 04:34 pm by vinceherman
Is there a problem with posting the same question in 2 different places? If there is, I apologize.
Yes.  There is a sticky post at the top of each forum named How to use this forum, please read.

You should read through it.  It contains a lot of helpful information for new forum members like yourself.

That post describes why cross posting is bad.  This is the text from that sticky post:
Quote
Don't cross-post!

We know you are anxious to get an answer to your problem, but re-posting the same question to multiple parts of the forum causes duplicate effort, and divides the focus on your problem. You'll get a better answer if everyone can discuss it in one place. Cross-posting is very annoying; the moderators will delete your extra posts, and you will get a warning. Save all the hassle, and just post the question once. It will be noticed.

If you aren't sure what section to post in (Programming Questions, Electronics, etc.) make a guess. Don't cross post "just in case".
I see that the threads have been merged.  I look forward to seeing how your project progresses.
Oh, pics.  I like to see pics of the projects.  So I am putting in my request now.

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