File puptcrit/puptcrit.0503, message 127


Date: Wed, 23 Mar 2005 16:26:19 EST
Subject: Re: [Puptcrit] automated curtain question
To: puptcrit-driftline.org-AT-lists.driftline.org


 
In a message dated 3/23/2005 3:52:01 P.M. Eastern Standard Time,  
kismet-AT-bigpond.net.au writes:

I'd try  a variable resister wired in series, adjust till the required speed
then  disconnect carefully and measure the resistance.....one problemo.  ...
resistance turns power into heat...to go from 1420 rpm to say 3 or 4  rpm
will create an amount of heat AND decrease the power to the point that  you
would be lucky if the motor turned, let alone pulled the curtain.  Bonfiglio
make a range of neat motor/gearboxes but you pay for them! Try a  gearbox
from a Meccano set, a cheap car kit etc....... . . . good  luck!



Thank you for the Information, that is a concern that I would burn  out the 
motor
  it did come with a box of various size gears, will play around with  what 
you stated
if it fails then will go with plan B,  as Jim  Gamble stated it might be 
better to obtain a setup made for the purpose
   I may be able to locate a motor designed for window displays  that would 
rotate
  at 2-4 rev. minute.will need to look around.
  Regards,
 Mark
 
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