Posted: Tue Jul 31, 2007 3:29 pmCan anyone say what type of speed control is appropriate for the Ametek vacuum motors? I don't know what kind of motors they are but I'm sure they're AC. Thanks in advance, Steve
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Ametek speed control - what kind of controller
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Posted: Tue Jul 31, 2007 3:29 pmPosted: Tue Jul 31, 2007 4:35 pmThey're a "universal" type motor which I think means they can operate on either AC or DC at any rate they have brushes and a commutator. For speed control, it's recommended to use some type of voltage control like a variac, dimmer switch type controller work as well but motor longevity is better with a variac.
Posted: Tue Jul 31, 2007 7:08 pmYup, all you need is to adjust the supply voltage up and down, and a variac is the simplest and most reliable way to do that.
Posted: Tue Jul 31, 2007 9:22 pmWell, I'm glad to hear that. I'm thinking I can build a simple depression control with pieces available to me. I can get a differential pressure transducer easily enough and a variable voltage source. The trick will be the controller to interface the two. By the time I'm done the off the shelf pieces may seem a bargain.
And before that is worthy I would be better advised to buy one of bruces 180 pitots! :p
And before that is worthy I would be better advised to buy one of bruces 180 pitots! :p
Posted: Wed Aug 01, 2007 12:30 amHi Steve, I bought a Router Speed Control from Harbor Freight that I have tested, but as yet my bench is incomplete, so can't say I have used it any. Their part number is 43060, and it is currently on sale for $9.99! It is good for 15 amps and seems to work as required for controlling the motor speed of my "surplus center" type motors. Website is:
harborfreight.com
in case you aren't familiar with them. Search using the part number. Good luck!
Doug
harborfreight.com
in case you aren't familiar with them. Search using the part number. Good luck!
Doug