repeating on/off timer

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  #1  
Old 07-04-11, 05:43 AM
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Welcome to the forums. Have a look at the Tork 621 or 631.
 
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Old 07-04-11, 03:56 PM
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I don't believe that those Tork timers will do what you're looking for. Your best that will probably be to use 2 timers so that when one stops the other one starts. You could then use a contact also one of them to control your device. I don't have time right now to draw up a circuit for you.
 
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Old 07-04-11, 04:52 PM
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Originally Posted by Msradell View Post
I don't believe that those Tork timers will do what you're looking for. Your best that will probably be to use 2 timers so that when one stops the other one starts. You could then use a contact also one of them to control your device. I don't have time right now to draw up a circuit for you.
You're right, the Tork (or any other standard plug-in) timers won't do it. The dial ones have a 15 minute minimum interval, and while the digital ones can be set as low as 1 minute on, but they only have 4 on/off pairs per day.

And unfortunately cascading plug-in timers doesn't work either.

You need what's called a recycling timer. They are designed specifically for this purpose, they have programmable on and off durations rather than real-time clocks - but they're a little on the spendy side..

Amazon.com: CAP ART-DNe Adjustable Recycle Timer: Home Improvement
 
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Old 07-04-11, 07:48 PM
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Just out of curiosity, what are you doing?
 
  #5  
Old 07-05-11, 06:41 AM
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did you ever think of using a coffeemaker water heater to heat the oil? It should get it to above 250f.
 
  #6  
Old 07-05-11, 09:29 AM
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Positive fuel cutoff and post purge would be better than the on-off cycling.
 
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