Hi all,

I'm working in a machine that has 3 measuring devices.

Those measuring devices measure distance.

Mechanically it's impossible to mount them perfectly aligned therefore I don't know the position nor the angle the 3 measuring devices are mounted.

The machine must measure the circumference radius of the introduced part.

I have 3 master circumference parts with a known radius each.

All circumferences (parts) are always mounted in the same position.

I know that the perfect difference between master circumference 1 and master circumference 2 is the difference between their radius:

r1 - r2 = perfect distance between circumferences.

And I can measure the first one m1 and the second one m2 and therefore I can get the distance of the two contact points with each circumference.

The problem is that I don't know the angle, neither the position of the measuring device and I need to find that to be able to use the feedback from the sensor to find out the circumference radius.

Is it possible to find this data? And which would be the right approach?

A link to a small diagram to make this a little bit clearer:

link to drawing

Thank you in advance for your time and help.

Joan.

I'm working in a machine that has 3 measuring devices.

Those measuring devices measure distance.

Mechanically it's impossible to mount them perfectly aligned therefore I don't know the position nor the angle the 3 measuring devices are mounted.

The machine must measure the circumference radius of the introduced part.

I have 3 master circumference parts with a known radius each.

All circumferences (parts) are always mounted in the same position.

I know that the perfect difference between master circumference 1 and master circumference 2 is the difference between their radius:

r1 - r2 = perfect distance between circumferences.

And I can measure the first one m1 and the second one m2 and therefore I can get the distance of the two contact points with each circumference.

The problem is that I don't know the angle, neither the position of the measuring device and I need to find that to be able to use the feedback from the sensor to find out the circumference radius.

Is it possible to find this data? And which would be the right approach?

A link to a small diagram to make this a little bit clearer:

link to drawing

Thank you in advance for your time and help.

Joan.

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