Renishaw HS20 Installation Manual page 47

4. Move the axis so that the measurement retroreflector is furthest away from the laser.
At this point make pitch and yaw adjustments to the laser to bring the beam onto the correct position
on the target.
5. Repeat steps 3 & 4 until the beam position is maintained on the target for the entire axis stroke.
6. Remove target from the measurement retroreflector and attach a voltmeter to the diagnostic
connector of the HS20 in order to monitor the signal strength.
7. With the measurement retroreflector near to the laser head, check and adjust the position of the
interferometer to ensure both beams are concentrically placed on the return aperture, and that
maximum signal strength (1V) is indicated on the voltmeter.
8. Now move the axis whilst checking the signal strength along the full length of the axis. It is
recommended that the signal strength remains above 70% (0.7v) for the entire range of the
machine. It may be easier to do this using the LS06 beam steerer.
- Firstly tighten all the screws on the HS20 laser head and alignment plate.
- Fit the LS06 beam steerer to the front of the interferometer. Take care not to move the optics.
- Run the machine along the axis whilst making small adjustments on the beamsteer to ensure
that the machine stays aligned.
- When the machine is aligned, complete another run to ensure that the beam is correctly aligned
along the length of the axis.
Figure 46 - Axis furthest away from laser
Figure 47 - Yaw adjustment
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