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Making an Electro magnetic hammer
Posted by sandy klein on 11/20/2004, 8:39 am I wish to make an electro magnetic hammer. Specs: Vertical mounting, 3-4 inch stroke, 80-100 percent duty cycle. Cycle rate 80-120 strokes per minute. Hit will have 5-15 pounds of impact strength.
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Re: Making an Electro magnetic hammer
Posted by Bert Hickman on 11/21/2004, 9:54 am, in reply to "Making an Electro magnetic hammer" Hello Sandy, Glad you enjoyed your visit to the site. A man's gotta' have a hobby... :^) Because of the length of the stroke (3-4"), there are no simple electromagnetic solutions that come to mind. In fact, the simplest (and least expensive!) solution may be to use an electrically controlled air cylinder with a 4-5" stroke. You'll need a source of compressed air and an air regulator. By varying the amount of air pressure via the regulator, you can control the speed and the static force from the cylinder. And, by adding more or less mass to the hammer "head", you can control the impact force when it hits. You can control the cylinder electrically by using a solenoid valve. Sometimes a solenoid valve is even combined with an air cylinder for even more convenience. For some inexpensive examples of these devices see: Good luck and best regards, -- Bert --
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Re: Making an Electro magnetic hammer II
Posted by sandy klein on 11/21/2004, 10:51 am, in reply to "Re: Making an Electro magnetic hammer"
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Re: Making an Electro magnetic hammer II
Posted by Bert Hickman on 11/21/2004, 5:38 pm, in reply to "Re: Making an Electro magnetic hammer II" Well, it may be possible to use a long stroke solenoid, either standard or custom designed. However, 2" is a fairly long distance for a linear solenoid, and large solenoids tend to be fairly pricey. Also, unlike an air or hydraulic cylinder, the force and acceleration will be a nonlinear function of the plunger's position. You could intensify the speed and force by pulsing a DC solenoid from a high voltage capacitor, but this adds another layer of complexity. Sorry, but I don't have any electromagnetic solutions that are simple and inexpensive. Best regards, -- Bert --
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