Interesting I had not noticed this resistor. I'll do some careful resistance checks next time I am in one of these buggers. Additionaly ceiling fans also use a two section capacitor so section a alone, or b alone, or both are connected into the winding circuit for speed change. Ron ----- Original Message ----- From: "Max Robinson" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, August 16, 2006 5:18 PM Subject: Re: [BlindHandyMan] Fan maintenance
> This message has two paragraphs. If you think you are not interested in the > first one, skip to the second one. > > Actually I am betting on congealed oil in the bearings. About the only > cure for this is to dissolve it with new oil. The right way to do it would > be to tear down the motor and clean out the bearings with kerosene but > that's a lot more work then a couple of drops of oil. > > Dan. Some of those box fans place a resistor in series to cause more > slippage in the induction motor and let the fan run slow. This works with a > fan because the load on the motor is always the same at a given speed. The > resistor is usually not recognizable as a resistor but is distributed along > the cable connecting the switch to the motor. In such a fan the cable will > feel slightly warm after prolonged operation at medium or slow speed. The > distributed resistor can become open, that is, burned out, although there is > not likely to be any burned smell or scorched insulation. The fan might be > repaired by replacing the resistance cable with a discrete resistor. A more > usual way of changing the speed of a fan is to have taps on the motor > winding. Such tapped windings are more expensive to manufacture than a > simple coil. Which method is used is an economic decision by the > manufacturer. Whether a tapped motor winding or a resistance cable costs > more. > > Regards. > > Max. K 4 O D S. > > Email: [EMAIL PROTECTED] > > Transistor site http://www.funwithtransistors.net > Vacuum tube site: http://www.funwithtubes.net > Music site: http://www.maxsmusicplace.com > > To subscribe to the fun with tubes group send an email to, > [EMAIL PROTECTED] > > ----- Original Message ----- > From: "Dan Rossi" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Wednesday, August 16, 2006 10:47 AM > Subject: Re: [BlindHandyMan] Fan maintenance > > > > Just out of curiosity, can Max or Tom shed a bit more light on the fan > > subject? I wonder if it is not something electronic and not just > > mechanical, such as burned out coils on the transformer or something like > > that. > > > > I also had a big box fan that I ran every night for white noise. I ran it > > on medium speed for years. After a long time, if I turned the fan on > > medium it would not start turning. I could possibly feel a bit of > > vibration like it might sort of been trying to turn, but it just wouldn't > > get started. However, if I turned it on low or high, it worked just fine. > > If I turned it on high, let it get started, then turned it to medium, > > sometimes it would stay going, but more often than not it would just slow > > to a stop. > > > > Later. > > > > -- > > Blue skies. > > Dan Rossi > > Carnegie Mellon University. > > E-Mail: [EMAIL PROTECTED] > > Tel: (412) 268-9081 > > > > > > To listen to the show archives go to link > > http://acbradio.org/handyman.html > > or > > ftp://ftp.acbradio.org/acbradio-archives/handyman/ > > > > The Pod Cast address for the Blind Handy Man Show is. > > http://www.acbradio.org/news/xml/podcast.php?pgm=saturday > > > > The Pod Cast address for the Cooking In The Dark Show is. > > http://www.gcast.com/u/cookingindark/main.xml > > > > Visit The New Blind Handy Man Files Page To Review Contributions From > > Various List Members At The Following Address: > > http://www.jaws-users.com/handyman/ > > Visit the new archives page at the following address > > http://www.mail-archive.com/[email protected]/ > > For a complete list of email commands pertaining to the Blind Handy Man > > list just send a blank message to: > > [EMAIL PROTECTED] > > Yahoo! Groups Links > > > > > > > > > > > > > > > > > > > > To listen to the show archives go to link > http://acbradio.org/handyman.html > or > ftp://ftp.acbradio.org/acbradio-archives/handyman/ > > The Pod Cast address for the Blind Handy Man Show is. > http://www.acbradio.org/news/xml/podcast.php?pgm=saturday > > The Pod Cast address for the Cooking In The Dark Show is. > http://www.gcast.com/u/cookingindark/main.xml > > Visit The New Blind Handy Man Files Page To Review Contributions From Various List Members At The Following Address: > http://www.jaws-users.com/handyman/ > Visit the new archives page at the following address > http://www.mail-archive.com/[email protected]/ > For a complete list of email commands pertaining to the Blind Handy Man list just send a blank message to: > [EMAIL PROTECTED] > Yahoo! Groups Links > > > > > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.405 / Virus Database: 268.11.0/420 - Release Date: 8/16/06 > To listen to the show archives go to link http://acbradio.org/handyman.html or ftp://ftp.acbradio.org/acbradio-archives/handyman/ The Pod Cast address for the Blind Handy Man Show is. http://www.acbradio.org/news/xml/podcast.php?pgm=saturday The Pod Cast address for the Cooking In The Dark Show is. http://www.gcast.com/u/cookingindark/main.xml Visit The New Blind Handy Man Files Page To Review Contributions From Various List Members At The Following Address: http://www.jaws-users.com/handyman/ Visit the new archives page at the following address http://www.mail-archive.com/[email protected]/ For a complete list of email commands pertaining to the Blind Handy Man list just send a blank message to: [EMAIL PROTECTED] Yahoo! 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