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The Index Module

There is a removable index module (see Figure 5) mounted on the target

to aid in the indexing of the target at 0 and 180 degrees. The procedure

of indexing the target at 0 and 180 degrees is done when the target is

used to check the alignment of an axis of rotation and the alignment of a

bore. The module can be loosened and positioned in any orientation or

removed from the target when it is not needed.

To use the Index Module, rotate the target so that the bubble level is

showing “level,” then take a reading. Rotate the target 180 degrees, re-

level the target and take a reading.

Mounting Error Calculation

All T-212 targets are shipped with the target PSD aligned to the housing within .0005 in. TIR. In time,

handling may cause the target cell to become out of center. To remove centering and fixture errors, use

the NORMIN method of taking a normal reading, rotating the target 180 degrees and taking another

reading, and splitting the difference between the two (see The NORMIN Procedure beginning on Page 5).

This is done for the center values and angular values separately.

Figure 6 –

T-212 with Index Module

Содержание T-212

Страница 1: ......

Страница 2: ...ticles of equipment manufactured by other companies and limited by a warranty extending for less than one year In such an event the more limited warranty applies to said instrument or article of equip...

Страница 3: ...ents Introducing the T 212 4 Axis Target 1 Interpreting Signs 2 How the T 212 Target Measures Angle 3 How the T 212 Target Measures Center 3 The Index Module 3 Mounting Error Calculation Error Bookmar...

Страница 4: ...f the target see Figure 2 Figure 2 Centering and Angular Modes To switch to Angular Mode remove the light shield and insert the lens module using the index pin see Figure 3 to orient the lens properly...

Страница 5: ...Page 5 The T 212 Target s half inch mounting stud is designed for use with Hamar Laser s target mounting fixtures Custom mounting fixtures are simple to design a in hole reamed square to a face is all...

Страница 6: ...the results shows the pitch and yaw of the axis of the bar or bore relative to the mechanical axis used to support the indicator Figure 4 Measuring Angle with the T 212 Target With the T 212 this subt...

Страница 7: ...rget so that the bubble level is showing level then take a reading Rotate the target 180 degrees re level the target and take a reading Mounting Error Calculation All T 212 targets are shipped with th...

Страница 8: ...ore alignments True Bore Center Target Center and Laser Reference Centerline If mounting fixtures were perfect the Target Center would be located at the True Bore Center and if perfectly aligned the T...

Страница 9: ...n the readout are also rotated Therefore although the Target Center appears to be to the right of and lower than the Laser Beam Center in Figure 9 the vertical readings are positive and the horizontal...