Lab 7 Total Station and Coordinate Measuring Machine (CMM) 

In this lab you will learn some basic operations on the total station (the Leica builder) and the CMM (the TESA MICRO‐HITE 3D). You need to know how to set up the total station and how to measure distances and angles between points of interests with it. For the CMM, you need to know how to do the start calibration and how to measure with it the dimensions of some simple parts. 

I. The Total Station 

The total station we are using is the Leica Builder R200M. 

Take the Builder out to the bench mark at the south of Meinel. Set up the Builder on the bench mark.  

Measure the angle between two objects. (pick two as you like) 

Measure the size of the side block of the stadium. Check the result with measuring tape. 

Measure the height of the parking building. 

Measure the area of the concrete block of the pavement. 

(Here are some basic instructions from the manual. For some part that is not included, refer to the paper version manual.) 

 

 

 

 

 

 

 

 

 

II. CMM 

Follow the quick guide start up the machine. 

Measure the size of a square. 

Measure the size of a gauge block. 

(IMPORTANT! : The CMM is an expensive and delicate machine. Please do not force the axes to move. Do not exert too much force on the Zrail. Do not overtravel the probe; damage can occur after just a couple of millimeters of travel.) 

 

 

 

 

 

Uncover machine, make sure air supply ishooked up,

Turn on machine at left side of touch screen

Press button next to check mark to aòceptLanguage default setting

Press this button every time the reading takenby the machine is to be accepted

Follow instructions for catibration every timemachine is to be used after being off.

First task is to recognize the origin point .Follow instructions on screen

Every axis can be locked in position at any timewith switches at vertical sliding arm

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IMPORTANT: push and pull vertical sliding armevery time you move on the y axls

Accept the default for TTp probe

Next task is to remove the probe and place Zrail against the sphere

Before you do this, move Z rail close to thecurrent position of the ball

Remove the probe loosening the lever at theright side of Z railPosition bottom of Z rail on top of the sphereand accept the point

Reattach Probe to Z rail at the same position itwas before (light in front)

Next task is to measure the qualification sphere

IMPORTAÑT: For all following tasks and tomeasure anything points have to be registeredcontacting probe to surfaces. To do this,carefully move probe close and make contactwith the surface approaching it very slowly andnormal to the surface. Do not drag probe acrosssurface.

You need to contact the sphere on five points.

First touch the top of the sphere.

Next, you need to touch four sides along the"equator" of the sphere, a suggested way to dothis is to get the probe in position then lock theZ axis

Contact four points around the sphere

Unlock Z axis

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Accept reading of Probe tip summary (unlessthe reading is not within tolerance)

Press button next to Measurement icon

The measurement screen is blank and showsthe position of the probe from the origin pointestablished in the beginning, at the front, top leftside of the machine

Register four or more points in the granitesurface to define a plane for the origin of the Zaxis

Accept the reading when the arrow is in theplane icon position

Another way to accept a reading is to push thecheck mark button in the Z rail

Sometimes a circle is registered when you aretrying to define a plane, this is because thesoftware recognizes three or more points asdefining a circle as if they were intersecting thecircle.

Cancel the circle definition by pressing thebutton next to icon shown. This icon cancels thelast reading registered.

The best approach to avoid registering a circleis to select four points on surface, one of theminscribed inside three points defining atriangular shape

The screen at the left shows how a plane isregistered

Press button to define this plane as datum "A"

This establishes the origin of the Z axis in thisplane

Once you define this plane as a datum, youshould see the screen turn to this

Next you need to define the X and Y axisdirectly on the part you are measuringTo do this pick two points first to define the Xaxis l ine.

First point to be picked must be on the leftrelative to the other one.

Pick second point

A line is registered in the screen. Accept this

Sometimes you get a screen asking you toestablish this selection of points as a plane.

Exit the screen and register two points again

Register two points at the left of the part todefine the Y axis line

This is what a defined line looks like in thescreen

Select the tools icon to establish a relationshipbetween the two lines you picked.

Pick relationships from tools screen (not shown)

Pick the two lines you created by selecting the xmark once you highlight every line

Accept the selections and select the buttonshown at the left, this will establish theintersection of the two lines as origin "C", whichwill make the lines to act as X and y axes