object detect

I am trying to configure this circuit to give an object a three dimensional co ordinates. I need a hand with sensing side ways movement applied to the tip of the probe.

I think you need to tell us a helluvalot more as I have no clue of what you're talking about. Sensor? Object? Coordinates? Circuit with unspecified inputs? Why 2 inputs for 3 dimensions? What movement? Probe? Tip?

@gates. do you know what that thing actually is and how it is used?

I am trying to configure this circuit to give an object a three dimensional co ordinates


Not possible.

The circuit is an instrumentation amp with ~700Hz low-pass action, gain of 45 and with a buffered reference input (top section). The two resistors in series on the reference input are mysterious. Such a circuit could
be used to present a +/-50mV differential signal to an Arduino analog input, for instance.

I was thinking of a circuit like this for a 3D digital probe for CNC.

IF your object is electrically conductive, then you only need to know when you touch the object. IF the object is non-conductive, then use a microswitch to detect contact with the object.

ALL the rest is software in your CNC machine.

Paul

@Gates: I was asking you, if you knew what that circuit was all about. I take your anser as "NO". I also Think that you do not know anything about CNC. Am I correct?

I do know what it does. Its in a book named "Practial Arduino" as a water tank senor.

Here is the next way I am looking at.

@zwieblum Well I have no problem building a CNC. I have a problem with getting accurate positioning. BTW what experience do you have with any type of Computer Numeric Control systems?

I equip schools with CNC machines and LinuxCNC :slight_smile:

Gates:
I do know what it does. Its in a book named “Practial Arduino” as a water tank senor.

What makes you think a “water tank sensor” (you didn’t even specify what exactly it senses - the presence of the tank or so?) has any relationship with getting 3D coordinates for a CNC machine?

relativity to pressure applied to the sensors tip when it touches the surface.

Gates:
relativity to pressure applied to the sensors tip when it touches the surface.

These remarks start to make less and less sense.

Are you trying to get help with something or just trolling? I more and more have the feeling it's the second.

If you have ever played around with a CNC, you would know that it can be possible to go past your work area. The task that I am trying to achieve is to locate all objects with some precision within a calibration library.

So say your all objects aren't the material you set your probe for...wouldn't you what to test the surface that a probe is currently above.

Let's assume your touchprobe does work (which it does not - it's not a probe at all). Have you any idea how long that scan would take with a decent accuracy?

This is a classic "solution looking for problem" aproach.

Well you know the size of the object I intend on measuring? I never gave a height/ length/ cubic measurements/ total area size...etc

STOP trolling.

(This is a classic “solution looking for problem” aproach.)

I don’t know about that, approx input / output value.

? ? ? The "usual" aproach for inaccurate measurement is a linecamera + laser. You can get it off the shelf for "some" money. Or you use ans abitrary camer - just look at linuxcnc site and browse aroud. But nobody with his wits togather places a random number of workpeaces on random locations of the CNC workarea. That's just so outerworldisch that I cannot express the strangeness of such an idea with polite words.

Gates:
Well you know the size of the object I intend on measuring? I never gave a height/ length/ cubic measurements/ total area size...etc

Don't you think it matters whether the object is the size of a cube of sugar or the size of a complete building?

(and yes, both can be 3D scanned just fine, but require a vastly different approach to it).