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I removed the following text from the main page. Please feel free to readd it in a more coherent form.
> Stepper motor movements and speed are defined by which poles are on or off.
> Stepper motors are similar to DC Brush less motors due to the fact that they use poles in conjunction with magnetism. Insert non-formatted text here > Hard drive motors can be "sort of" thought of as stepper motors because the servo must use some kind of pole system to know where the spindle is to send it to the chip. But they are not STEPPER Motors; they are a type of DC Brush less.
> Stepper motors have been used in micro machines.
> Stepper motors are kool.
kmccoy (talk) 01:53, 11 Apr 2005 (UTC)
I might get to these later...
Anyone want to add schematics to show some of the things described? (the coils, the transistor drive)
Can u also add some data as to what will happen if two of the consecutive stators are simultaneously charged? 202.41.93.129 04:36, 21 March 2006 (UTC) AD
I plan to play around with Inkscape, post the SVG code so you can improve it.
Scheduled for this weekend, please give a note here, If you are already working on this.-- Arnero 18:07, 5 May 2006 (UTC)
I added a physical description of how step motors work and some text to go with the figures; I thought it was kind of hard to get a basic idea of what step motors are from the page before. I also organized the unipolar vs. bipolar information.--
Dreadengineer 09:17, 20 December 2006 (UTC)
Sizing would be useful, a list of the NEMA standards, and if there are any standards for the can type. ˥ Ǝ Ʉ H Ɔ I Ɯ ( talk) 03:22, 2 December 2014 (UTC)
I changed the "Fundamentals of Operation" back to an earlier version, with a few edits. Stepper motors are very commonly used by hobbyists, so it's important to have an easily understood explanation of their operation. The previous explanation used terms such as external commutation, phases of a motor, magnetic reluctance, etc., all of which are valid, but are unnecessary for a basic understanding of fundamentals of operation. They should go in a different section, and the "Fundamentals" section should give a quick, basic understanding of how steppers work. Dreadengineer 05:22, 21 September 2007 (UTC)
The images that illustrated stepping had been removed with the note that they were "wrong." I'm assuming this meant that the images are not the same as the actual construction of stepper motors. But the images are effective at communicating the basic idea of how stepper motors work. Also, they are not very different from motor construction; see the "hybrid" image on this page: http://www.ams2000.com/stepping101.html or this one: http://www.sapiensman.com/step_motor/. It's true that the images don't illustrate that parts of the stator on both sides of the rotor will be energized, but adding that would add confusion to the picture and is unnecessary to explain the principle of operation. We can discuss it here if anyone disagrees. Dreadengineer ( talk) 05:34, 27 January 2008 (UTC)
The animated image in wrong in that stepper motors don't work that way. In a 2-phase stepper motor, there are just two electromagnets and the stepping sequence involves changing polarity. It is a nice image, but it is wrong. Having a wrong image is worse then having no image. The image is wrong, the description below the image is also wrong. The image should show the two coils opposite each other working together and changing polarity. Like at http://en.nanotec.com/steppermotor_animation.html FreedomSeven ( talk) 21:45, 13 May 2011 (UTC)
FreedomSeven, you're thinking of a bipolar stepper motor. The animation is of a unipolar stepper motor, which does work the way shown. Also, the motor in your link is a brushless DC motor, not a stepper motor. That page seems to be illustrating the driver circuit, not the motor type. Notice that their motor picture is the same when you select the brushless DC option. Dreadengineer ( talk) 05:52, 15 February 2012 (UTC)
Also, I'm not sure of the value of the last image on the page, which talks about motor configuration and says "everything is combineable." It's not clear what is illustrated by the image; it seems pulled from a page that talked about it in more detail. Does anyone think it adds value? Dreadengineer ( talk) 05:48, 27 January 2008 (UTC)
hello,
Do SRD's bear any similarity to stepper motors as i tried looking for them on wikipeida and all i got was stepper motor.
Hre is a site that has a little info on SRD's
Switch reluctance drives [1]
many thanks
wouse101 ( 82.3.201.199)
I recommend that the following sections be added:
Juxtaposition with other brushless DC motors Juxtaposition with other electric motors
I found a Naval Electrical Pocket Book from 1933 at a car-boot sale, and was surprised to learn that step-by-step motors were used as early as the 1930s for setting the firing elevation and deflection on battle ships:
The device was electro-mechanical and human operated. They even did half-stepping. Should there be a History section in here? —The preceding unsigned comment was added by 213.58.97.242 ( talk) 16:41, 15 January 2007 (UTC).
It could have a history section; other motor articles don't, though. Motor technology in general has been around for a long time. Dreadengineer 05:22, 21 September 2007 (UTC)
I'm not very familiar with the subject or I would attempt to add a section or is there a reason there is nothing in the article regarding half stepping? Thorney 05:58, 12 May 2007 (UTC)
One important and popular application of stepper motors is in electronic (quartz) watches and clocks with an analogue face. The motor is used to drive the 'second hand' in steps of 1 second.-
A link to electojects.com has been repeatedly added to Stepper motor, Electric motor and Brushless DC electric motor by Special:Contributions/217.53.109.235, Special:Contributions/82.201.156.201, Special:Contributions/217.53.107.168, Special:Contributions/217.53.16.164, and others.
The link in question is registered to Abdoh Ali Mohamed, Hay Swesri, Nasr City, Cairo, Egypt. [3]
I wonder if the four IP addresses listed above have any connection... Naw, couldn't be. [4] [5] [6] [7] Egypt is a big country. Must be a coincidence.
I'm going to start patrolling wikipedia for any links to electojects.com or redirects to it and deleting them on sight. If they come back, I'll move to blacklist the address. Mdsummermsw ( talk) 18:07, 28 December 2007 (UTC)
The awardspace.com link is from the same source. [9] [10]. - Mdsummermsw ( talk) 19:01, 28 December 2007 (UTC)
I have now removed the same user's links to her/his other site at awardspace.com from Stepper motor, Electric motor, Motor controler, DC motor, Brushed DC Electric Motor, Electrostatic motor, Motor and -- the kicker -- Stepper which has no relationship to the rest, other than the name. - Mdsummermsw ( talk) 20:03, 28 December 2007 (UTC)
This website ( electojects.com/motors) is helpful, you havn't to remove it. 217.53.108.172 ( talk) 22:56, 28 December 2007 (UTC)
An additional comment on this issue has been added to Talk:Electric_motor#Spam. - Mdsummermsw ( talk) 13:31, 31 December 2007 (UTC)
I have just taken a quartz clock to pieces and the motor in it has a permanent magnet rotor and a long U shaped stator with a coil around it: the ends of the U nearly touch the rotor. Why does it go around only one way in half turn steps each second? there is no mechanical ratchet. Also, this type of stepper motor is not described in the article. -- 83.105.33.91 ( talk) 10:48, 22 April 2008 (UTC)
This is a stepper motor. This has a very simple design and with each pulse the rotor moves 180 degrees and this is geared down to the seconds hand. The design is not critical on the pulse width or the pulse height (within limits) and depends on the frequency alone. Basically it has only one coil and two poles with a (ferrite) magnetic rotor. I do not know how the direction of rotation is established. Ck.mitra ( talk) 08:05, 8 October 2009 (UTC)
As a student, having read the article I still don't understand why it is required to reverse the polarity of the electromagnets at all - the clear demonstration using images suggests you just need to switch electromagnets on and off. Am I missing something or does the article not make the link between switching electromagnets on and off and having to change their polarity? —Preceding unsigned comment added by 195.137.75.44 ( talk) 15:33, 29 November 2008 (UTC)
Is there mistake in point number one of references? It is reference to book "Instrument Engineers'...". On wikipedia page it says that the information about types of stepper motors are on page 2464 of that book, however they are on page 1377. Is it right? —Preceding unsigned comment added by Rumcajs00 ( talk • contribs) 14:39, 13 June 2009 (UTC)
I added some definition to motor types and made a minor change in the introduction, eliminating the reference to "normal DC motor". There is nothing abnormal about a stepper motor, it's a conventional synchronous DC motor. The original reference to "normal DC motor" is probably referring to an asynchronous DC brush motor. The concept of "normal motor" is colloquial and is open to interpretation based on the experience of the reader. Overall, this article needs quite a bit of correction to get to proper descriptions in terms of physics and the engineering of electric machines. -- LifelongEngineer ( talk) 01:37, 23 September 2009 (UTC)
You are absolutely correct. If you draw the pulses with sine/ cosine waves, you can see that stepper motors are basically synchronous motors with rotors replaced with permanent magnets. As stepper motors are small (usually) this causes no serious problems. Large synchronous motors will need slip-rings and coils on the rotors. This aspect becomes very clear once you drive the stepper in the microstepping mode when the analogy to the sine/ cosine drive waveform will be apparent. Also you can see in microstepping mode there is absolutely no way to stop the rotor in an arbitrary position.
Another important difference is that in "normal" motors, the poles on the rotors are usually slanted at an angle to prevent latching. But this is precisely the effect we need in stepper motors and the poles are parallel to the axis. Ck.mitra ( talk) 08:17, 8 October 2009 (UTC)
We may have a background of different engineering terms. The slant or skew found in the rotor laminstions of brush type DC motors and AC servo motors is to reduce cogging, the sine wave of torque that is superimposed on the intended torque generation. I suspect this is what you mean by latching-- LifelongEngineer ( talk) 18:48, 18 October 2009 (UTC)
The article lacks some clarity and completeness about the distinction between parmanent magnet stepper motor and variable reluctance stepper motor. Some sections only apply to one type without even mentionning it.
For instance : in the introduction "Stepper motors are similar to switched reluctance motors": this applies to variable reluctance motors. The animated image describes a VR motor too. "fundamentals of operation" too.
The section "two phase stepper motors" only describes permanent magnet stepper motors.-- Olivier.rieux ( talk) 14:12, 15 June 2010 (UTC)
I believe the operation described in the figure in phase current waveform is that of a two phase unipolar stepper motor (according to the description above) and not a four phase as mentionned in the caption.-- Olivier.rieux ( talk) 14:40, 15 June 2010 (UTC)
Contact owner of this website to add these photos?
How to build stepper motors. http://www.aerodesign.de/peter/2001/LRK350/LRK350-20-15_eng.html http://www.aerodesign.de/peter/2001/LRK350/Warum_dreht_er_so_eng.html#Anker1164462
-- Ericg33 ( talk) 03:01, 6 July 2011 (UTC)
In order to understand the contents of the third paragraph, clarification of the concept phase in the context of stepper motors is needed. The explanation is based on this concept and thus requires the user to first figure out what it is elsewhere. Blecchi ( talk) 10:15, 1 December 2013 (UTC)
== Title error of section "wave mode" (there are two full stepping modes, the first one most likely addresses a different topic "wave mode" - as mentioned in the text"
It says "remnant". Does it mean remanent? 213.160.127.250 ( talk) 14:29, 14 April 2014 (UTC)
I believe that stepper motors are commonly used in the analogue indicators of speedometers in modern motor vehicles. (I recently read a report, not on the internet, by a police crash investigator who has done research on the effect of crashes on these). This application is not mentioned on this page, and there is no mention of stepper motors on the "Sepeedometer" page either. Sorry but I don't know any more about this. Is there someone out there who does, who could add a biref mention in both this page and the speedometer page? Thanks -- 86.160.153.66 ( talk) 12:56, 24 February 2015 (UTC)
Some of the applications are nowdays quiet obsolete. How many persons borns after 1990 knows what i floppydisk is? 82.209.141.187 ( talk) 07:56, 11 June 2022 (UTC)
I suspect that we are all agreed about the meaning of the term, and how it relates to one of the common ways in which most types of electric motor (DC brushed or brushless, AC induction in particular) may be mounted. However the "Flange" Wikipedia article does not mention motors at all. The omission is larger than this one article. I am suggesting that someone more experienced than me decides how to implement the necessary improvement. For instance, should every relevant motor article have a mention of mounting arrangements? (These would include foot mounting, often where chain or belt drive is used, flange where direct drive is used and axial alignment is fairly critical, or "servo" where small clamps engaging a groove are used, but there is a registration diameter on the end of the motor, like flange mount, to centre it accurately in its location.) There are almost certainly a range of other mounting styles of which I have no knowledge, hence my desire for someone else to fix this.
Tiger99 ( talk) 21:04, 4 November 2018 (UTC)
i think stepper motor can also use as a vibrator, vibrational motor for capping bottle or shifting of any object from its container — Preceding unsigned comment added by 27.61.157.253 ( talk) 02:29, 13 December 2018 (UTC)
I don't understand why the latter part "Wave drive and single phase full step are both one and the same, with same number of steps but difference in torque." is in this subsection that is about full-step drivings. It makes this subsection uncleared.
Maybe it should be moved to the subsection above regarding wave drive. This senttence is also a bit unclear, so maybe also add some clearence to it. HenrikBorg ( talk) 14:37, 7 August 2019 (UTC)
Currently given animation is increasingly oversimplified. AXONOV (talk) ⚑ 18:12, 26 July 2022 (UTC)