automatic hammer

[camr_tna]

Hi!

I have no electronic background so I am only relying on some existing samples and researches.

What I have is NI USB 6002 and it is connected to a solenoid which will make an impact at constant spacing distance which was also recorded by the same NI 6002. Can someone help me with a labview code?

[mikeporter]

Your first problem is hardware. It is highly unlikely that the USB 6002 will be able to drive a solenoid unaided. What is this automatic hammer? What kind of solenoid is controlling it?

If you don't know electronics you need to be finding someone who does. What sort of background do you come from?

Mike...

[camr_tna]

It is a device which taps at constant spacing.

This is the concept:

I have a mobile system moving on top of my material and at specific interval, the hammer powered by solenoid (700 g force) will tap my material.So this distance sensor and hammer is connected to my NI 6002.

Another sensor attached to the system is connected to NI 9234 and will detect the impact and analyze it. It is similar to impact hammer test but what I am having problems with is automating hammer.

Im into materials so this configuration really confuse me.

[mikealder]

The NI 6002 digital output lines have a max current output of 4mA this won't drive a solenoid, you need some basic electronic parts to turn the switched output from the 6002 in to something with a few amps (measure the current the solenoid pulls to get a more acurate figure) - Mike

[Hooovahh]

Yup, make a buffer circuit involving an FET transistor.  Turn on the transistor using your digital line, and have the FET drive the large amount of current needed.  There is likely a 3rd party component that will do this for you off the shelf.

[mikeporter]

700G? That is one powerful "tap". In any case, the key parameters you are looking for concerning the solenoid are the voltage it requires and how much current is required to close it. What solenoid are you using?

How fast will this system be tapping? This could also come into play in that electromechanical devices have service lives that are shorter than all-electrical components.

Mike...

[jcarmody]

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@mikeporter wrote:
700G? That is one powerful "tap" [...] 

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It's not as bad as you think.  Drop a fairly rigid object onto a fairly rigid base and the acceleration shoots through the roof fairly quickly.  I did the math once...

[johnsold]

Grams or gravities?

Lynn

[billko]

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@jcarmody wrote:

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@mikeporter wrote:
700G? That is one powerful "tap" [...] 

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It's not as bad as you think.  Drop a fairly rigid object onto a fairly rigid base and the acceleration shoots through the roof fairly quickly.  I did the math once...

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But that's also why glass shatters when you drop it onto the floor.  So it actually is somewhat as bad as you think.  😉

[mikeporter]

I know this is rapidly wandering wayyyy off topic, but one time I had a conversation with an engineer at Corning where he explained why Corelle plates **don't** break when they are dropped on the floor. Very cool...

Mike...