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Wiper motors question

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weloveflying

Joined: 14 Aug 2017
Posts: 6

Posted: Fri Sep 08, 2017 8:14 am Post subject: Wiper motors question

*Newbie Question/First Thread*



I'm just wondering what kind of motors are used for wipers; are they servo motors, like this one: SM110 Motor Series, or are they just simply wiper motors, which are powered by a universal, electric motors? 



My hunch tells me that servo motors are the ones that are behind it, which is of course based on my understanding of a servo's function; nevertheless, it's just my hunch.



Your thoughts are very much welcome!

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Eric Page

Joined: 15 Feb 2017
Posts: 245

Posted: Fri Sep 08, 2017 10:53 am Post subject: Re: Wiper motors question

A simple DC motor spins at high speed.  It drives a worm gear that greatly reduces speed while multiplying torque.  The gear train turns an arm or cam with an eccentric lobe or pin, which makes the wiper arm oscillate.



Much cheaper and easier to implement than a stepper or servo motor, as no complex motor drive circuitry is required.



See attached exploded diagram.



Eric

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WiperMotor.GIF

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bob.verwey(at)gmail.com
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Posted: Sat Sep 09, 2017 8:08 am Post subject: Wiper motors question

My guess (based on having used one as a trim motor) is that most of them are dumb motors governed by external inputs like limit switches and timers....BWTHDIK



Best...Bob Verwey



082 331 2727

[img]https://docs.google.com/uc?export=download&id=0B5d7rgAInTuTUUZsUjY4QmJsdVU&revid=0B5d7rgAInTuTdDJDaXRFZVh3b3lMa3FWL0s3MFdzc01YRlNvPQ[/img]





 

On 8 September 2017 at 18:14, weloveflying <yourordinarybeing(at)gmail.com (yourordinarybeing(at)gmail.com)> wrote:

 	  Quote: 	
		  --> AeroElectric-List message posted by: "weloveflying" <yourordinarybeing(at)gmail.com (yourordinarybeing(at)gmail.com)>

 

 *Newbie Question/First Thread*

 

 I'm just wondering what kind of motors are used for wipers; are they servo motors, like this one: SM110 Motor Series (http://www.powerjackmotion.com/product/sm110-motor-series/), or are they just simply wiper motors, which are powered by a universal, electric motors?

 

 My hunch tells me that servo motors are the ones that are behind it, which is of course based on my understanding of a servo's function; nevertheless, it's just my hunch.

 

 Your thoughts are very much welcome!

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=472629#472629

 

 

 

 

 

 

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nuckolls.bob(at)aeroelect
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Posted: Sun Sep 10, 2017 6:34 am Post subject: Wiper motors question

At 11:06 AM 9/9/2017, you wrote:

  	  Quote: 	
		  My guess (based on having used one as a trim motor) is that most of them are dumb motors governed by external inputs like limit switches and timers....BWTHDIK

 	


  Correct, these are just DC motors with two or more

  speed select features (brushes offset from optimum

  torque position) or taps on series field windings

  (only in the nearly antique, electric motors).



  There are numerous articles on the 'net for using

  these motors in amateur robotics and other DIY

  situations . . . they are cheap and robust . . .

  but quite dumb. They have a servo-like behavior

  in their ability to 'park' the wiper blades but

  this is a simple limit switch mechanism. 



 

 

   Bob . . .

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