Home | Product Categories | Motors | ROB-09238

just for people who buy this ive made a post on my blog for creating a surveilance system using the motor http://garagedeveloper.wordpress.com/2009/12/05/the-diy-surveillance-system-using-a-webcam-part-1/ . all is open source with code so :) thanks spark fun

Hi. Is this a Bipolar or a Unipolar Stepper Motor? Can I control this motor using ULN2003 IC?

What kind of battery do I need for this?

Batteries won’t last long with a motor like this. You better use a power supply.
I tried to make it work with a little higher current, and I could feel the magnets move inside. Unfortunately, the head doesn’t spin…
Any clues about what’s happening here?

Is this NEMA 23? (Compatible with this tutorial:
http://reprap.org/bin/view/Main/McWire_Cartesian_Bot_1_2 )

it looks like from yourtube videos I’ve seen that this motor used to come with a much longer shaft. Any word on whether this has changed with this batch of motors, or could the data sheet be off.

This is a 200 step motor? What is the % margin of error per step? For example, with 5% MoE I can expect 1/8 step accuracy. With 10% MoE I can only use ¼ steps reliably.

Found in the datasheet: 1.8 degrees +/– 5%

Great motor. Any source for similar motors but smaller?
Thanks

Seems to be a nema 17 (31mm)

If you go by measurements on the picture here, motor body face size is about 26 mm square, yet datasheet with link above specifies 43 mm. Which motor exactly are you selling?

I have this motor and the EasyDriver V4.2. I have looked at many different posts and it would appear that I have everything hooked up correctly. When I send pulses to the motor to drive it, the motor just vibrates. It may be a similar issue to that posted by Lyouss on Oct. 8th 2009. Another symptom is that when I do single steps, there are times when my power supply is drawing the entire amount of current (aprox. 0.6 amps) and there are times when the current drops to about 0.3 amps and the motor loses it’s holding torque. Any help would be much appreciated.

Does anyone know how to use this with Ladyada’s motorshield?

Does anyone know where I can find a pull-out curve for this motor? I need to know the torque vs. speed characteristics.

Do you sell any wheels that fit this motor? I see you have wheels that fit to the DC motors. It looks like the shaft diameter is 5mm. Thanks for any help.

When do you expect these motors to be in stock again.

Mis: If you go by measurements on the picture here, motor body face size is about 26 mm square, yet datasheet with link above specifies 43 mm. Which motor exactly are you selling?
i’d like info on this too. i hope to dear god its 43mmx43mm, otherwise i’m returning.

I assume this is a standard NEMA-17 mount stepper. If not, let me know. Also, I’ve been looking around the web for a wheel to fit this 5mm shaft. Does anybody have any suggestions? Ultimately, I’d love to put an omniwheel on this thing but for now a regular wheel will do.
Thanks,
Reggie

Can you please identify the A & B wires for this stepper motor, and how they would connect to the easydriver ??
Thanks
John

What sort of speed should I be able to get out of this motor?
I can’t seem to get more than about 60RPM out of it, seems a little slow?

This is for comparison to other motors (to show you how good this really is). Datasheet Torque converted. This little baby is two times more powerful for its current than any Ive found.
0.230000 Newton Meters
23.0000 Newton Centimeters
2.30000e6 Dyne Centimeters
2.34535 Kilogram Centimeters
2345.35 Gram Centimeters
32.5708 Ounce Inches
2.03567 Pound Inches
0.169639 Pound Feet

Hi!!! Does anybody know where I con buy a pulley/gear for this motor? thx!

Shaft Copuling, look here
http://www.servocity.com/html/rigid_shaft_couplers.html
Greetings
FAA

Warning. Just got 4 of these motors in the mail. 3 were fine, but the 4th wouldn’t spin at all, even when cranked by hand. There was some mechanical obstruction. I opened up the motor and discovered that the insides were rusty with chipped paint on the magnetric drum.
Please check your storage conditions, Sparkfun guys. Also, before sending the things out, do a hand crank test. If the gears are welded, it should be obvious that that the device has issues.
Check the following shipment for rust, label: “Mercury Motor SM-42BYG011-25 23/2010”.

Hey, not sure if this is the place for this, but I just ordered 3 of these a few days ago that went out today… possible that they are bad?

I love these little motors. They are easy and fast to setup with the Easy Driver board also offered here on Sparkfun, and will work wonders in any project.
For those looking for simplified code for Arduino + Easy Driver + 2 button forward/reverse control visit:
http://currentamps.com/projects/2-button-stepper-motor-control

Another interesting DJ-related post:
This motor’s torque drops it somewhere between a Technics 1200Mk2 Turntable and a Numark TT500.
…Also, stepper-motor vibration could be mechanically mitigated…
…Also 33.3rpm wouldn’t be a problem for this motor…
Do you see where I’m going with this?
Someone please build a really smart turntable before I do. Do I have to do everything myself?
(Also… build the chassis out of laser-cut parts from Ponoko… and add fun lights… and maybe a little display of some kind)

What is the sequence for this motor?

It says in the datasheet that the motor has a holding torque of .23 N.M. But not sure what the NM means. I have this stepper motor, but it does not seem to be able to turn heavier objects like a 1 pound 3 fit cardboard disc. I assume I need a stepper with more holding torque. Would I be correct?

I bought 3 of these and got 3 matching easy drivers v4.3

I measured the wires and got 34.5 ohms on the following pairs of wires:(red, green) (blue, yellow) …any other combination yields 0 ohms.

I connected one pair to [A] and the other to [B] on easy driver. (Gnd, Stepper, Dir) on the easy driver gnd and stepper are connected to digital pins on an Arduino Uno (gnd is not connected to anything).

The power source a power supply that reads 9VDC @ 800ma (even though when i measure the voltage it reads 13.2 Volts).

When I power everything up and send it pulses to step it does step and it changes direction. The problem is that it jitters way too much and is very noisy and it doesnt stay in one position.

I connected MS1 and MS2 to the Ground and Positive pins of the power connector using a 10K ohms resistor in an attempt to disable or enable Micro Stepping, and that had no effect. Playing with the current regulating Potentiometer on the easy driver didnt help either.

What am I doing wrong?

Thanks for your help!

Hey Sparkfun,
Could you please answer these questions?
1. Will this motor work with EasyDriver Stepper Motor Driver (sku: ROB-09402)?
2. Please tell me Wall Adapter for this motor.
Thank you very much.
D

4 wires, no directions. What wires go where using the mini stepper sold here? tia

I used these motors in a drawing machine installation we called SADbot: the Seasonally Affected Drawing robot. Check out the Instructable here: http://www.instructables.com/id/SADbot-the-Seasonally-Affected-Drawing-robot/
Did anyone else have problems with these burning out after a while? We had the installation on daily for about 6 hours, and over the course of about a month and a half had to replace 2 or 3 of them. A few students of mine used them as well and they burnt out after much less usage.

It says 0.33A. Is that the max amps the motor should ever see from driver? Or the amount it draws?
I have had it up around 210rpm. But hard to go any faster because of the ~1ms signal delay you need between high/low signals sent to the board. It seems to me a better general step driver would be a board that you raise one pin high to move and the driver handles the timing on the board. Another pin would output step completion signals. That way you have a feedback loop and can take Step pin low after N steps complete.

Can anyone tell me how many steps this motor can cycle through in one second? Is there a min / max to what you can set with the Easy Stepper?

Will this item come back in stock soon?

I’m using this motor with the Easydriver. The Easydriver will limit the current up to 0.8A. This motor needs 12V – 0.3A. I only got a power supply 12V – 1A.
Now I’m wondering, will it be safe to feed the motor 0.8A with the Easydriver? Does this mean I have to let it rotate slower because else the motor will burn? I’m new to this (trying to build a CNC) :) THNX

4-M3 4.5mm for the screw holes.
How do you read that? Is that M3 x 4.5mm?

I wish you add belts and pulleys for this motor as it is essentially parts of most automation and control projects .

I am using this with the easydriver and everything worked perfectly. However, I took off the bottom of the motor in order to mark where I would place it (i thought I could use the screw holes on the bottom to mount it). But now, when I connected everything back together, I power up the board and the stepper motor just holds steady, it does not turn at all. I didn’t know if this sounded like a problem w/ the motor or the electronics.

hello everyone. where you can find a gear reduction with ratio of 10 or more, for this motor?

I’m trying to wire this motor up to the Adafruit motor shield but i can’t seem to get the wiring right. Can anyone help? What colours go where? Everything on the board has been tested and is working fine.

Will i be able to power this with this supply: http://www.sparkfun.com/products/9442 ??

Does anyone have the solution for the question that a lot of people asked…My stepper motor just vibrates, and won’t spin at all. I’m using the adafruit motorshield as a driver. I’ve already tried flipping phases, changing voltages, etc. I’m only trying to get the thing to spin at 10rpm. I never knew using a motor could be so complicated!

In my (limited) experience with steppers 2 things would always cause them to vibrate but not spin. Either trying to drive them too fast (speed must be ramped up gradually) and hooking up the wires incorrectly. A google search will turn up loads of help, and a multimeter is a must for figuring these things out.

Hi, How hot are these steppers suppose to get? I am running them for 20 minutes, they are very hot. I could not find the data sheet anywhere.

Anyone know where you can buy gears/chain/mechanics to use with this motor?

This Stepper Motor really woks great with the Domo*pes lots of torque at high speeds.
http://cncsnap.com/node/149
http://cncsnap.com/wiki/domopes
Thanks for caring a great Product sparkfun.

I bought 4 of these in May for my Mendel 3D printer. One has failed – on the Y-axis. What is the warranty, if any?

Can you drive this with less than 12V? I would like to use a 7.4V lipo battery for short time frames.

On the easy driver I have to current turned down, but these motors still get too hot to touch after 30 min or so. Is this normal?

Any guidance on what the screw definition in the Spec sheet means? 4-m3, and 4 .5mm. It was asked earlier with no reply. This seems like something people would like to know.

When will sparkfun publish an arduino library for the EasyDriver ?

I am going to build a reprap soon, and I was wondering if these steppers would be adequate for the 2 Pursa z motors. and possibly if sparkfun’s new 400 step/rev steppers would be good for everything else
Thanks

Is this stepper motor rated at .33A per phase for a total of .66A?

What kind of plug would you put on the end of the wires and how would you put it on?

What kind of plug would you put on the end of the wires and how would you put it on?

How would you apply a plug like this http://www.sparkfun.com/products/10551 ?

How would you apply a plug like this http://www.sparkfun.com/products/10551 ?

Hi,

I’m using a bunch of these Sparkfun steppers with Easydriver, and everything works fine, except the steppers seem to have very little torque; for instance, I can easily make them stop turning by simply applying a little pressure with two fingers; I don’t need it to run a mill or anything remotely that demanding, just raise a 40g weight by turning a screw… Is there any way I can (first) measure the actual torque the stepper is building, and (then) improve it?

Thanks, G

would this be enough to close/open some roller blinds? thanks

I’m confused by the holding torque on this stepper. The data sheet says .23N.M, but the description says 2.3kgcm. Just using google to convert 2.3kgcm is ~207 oz.in, but .23N.M is only ~32 oz.in Unless I’m mistaken about how to do the conversions. I’m guessing it’s the latter (~32 oz.in) though because at only .33A per phase I doubt it’s capable of much more than that.

Does anyone know (or even tried) a worm drive suitable for this stepper motor? Besides the “Universal Mounting Hub” compatible with this motor, I could not find any other mechanical parts available on sparkfun.com :( In my opinion, things like shaft couplings, worm drives, etc. would be very useful for any robotics project. I know that Sparkfun is more electronics oriented, but it would be nice to find all these things in one place.. Thanks in advance!