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     2.  On the Abrasive screen (Fig. 13), select Abrasive Drum and rotate the joystick clockwise to change it from OFF to ON

Figure 13

1. 1. If screen is left untouched for four seconds it will revert back to the Operating screen (Fig. 12). Just reselect the previous screen and press ok.

     3. On the Abrasive screen (Fig. 13) move the joystick down and select Override. Press ok to change it from an X to a checkmark.

1. 1. If it has been sitting for a couple of days it may need some help to start spinning. Take the drum off and swirl it around to mix the slurry.
   2. The abrasive drum on the top of the LP50 will begin to spin.
      1. The abrasive drum contains a slurry mix of 500 to 600 mL of 600 grit aluminum oxide powder and a half full drum of DI water.
   3. The drip wires should not touch the lapping plate, monitor, or test block (Fig. 11).
   4. The drips should follow underside of the wire all the way down; if they do not, follow the wire with your finger to get the drips started.
   5. Turn on the drip monitor by pressing the green button (Fig. 16) just behind the drip tray.
      1. Once the lap wheel is started, the drip rate will be displayed on the Operating screen (Fig. 12) to the right of the Plate speed.
      2. The drip rate should be about 1 per second.
      3. To increase or decrease drip rate rotate the drip valve (Fig. 16)
   6. When the drips come out of the drum they should be split in half by the drip tray (Fig. 16). If they are not split evenly, move the tray so they are doing so.
   7. Let the lapping plate get wet.

     4.  Move the joystick down and select and press OK.

     5.  On the Operating screen (Fig. 12) move the joystick up and select Set Time. Press ok.

     6. On the Timer screen (Fig. 14)

          If screen is left untouched for four seconds it will revert back to the Operating screen (Fig. 12). Just reselect the previous screen and press ok.

Image Modified
Figure 14

1. 1. Move joystick up and select Timer rotate clockwise to change "Disable" to "Enable".
   2. Move the joystick down to select Rest Timer and press ok.
   3. Move the joystick down to select Set Time rotate clockwise to increase time and counterclockwise to decrease time.
      1. Set Time to 15 minutes
   4. Move the joystick down to select and press OK.

     7. On the Operating screen (Fig. 12) move the joystick down and left and select Plate. Press ok.

     8. On the Plate screen (Fig. 13) select Target Plate Speed.

1. 1. If screen is left untouched for four seconds it will revert back to the Operating screen (Fig. 12). Just reselect the previous screen and press ok.

Image Modified
Figure 15

            b. Rotate the joystick clockwise to increase speed and counterclockwise to decrease speed. Set the Target Plate Speed to 5 rpms.

            c. Move the joystick down to select OK. Press ok.

     9. On the Operating screen (Fig. 12) move the joystick down and to the left to select Start. Press ok.

     10. The lapping plate will begin to rotate.

     11. On the Operating screen (Fig. 12) move the joystick up and select Plate. Press ok.

            a. Increase Target Plate Speed (Fig. 15) in increments of no more than 10 rpms up to 70rpms.

            b. Move the joystick down and select ok.

     12. The test block and monitor should rotate counterclockwise. If it does not right away, it just may take a couple of minutes to adjust to the plate flatness. Then they will begin to rotate.

     13. On the Operation screen (Fig. 12) the Actual Flatness should stay within plus or minus 5 um and the Target Flatness should stay at 0 um.

     14. When 15 minutes has passed, select Stop on the Operating screen (Fig. 12) and press ok.

     15. The abrasive drum and lapping plate will stop rotating.

          a. Make sure the abrasive stops dripping by rotating it so the scoop inside the drum is vertical (Fig.16).

Drip MonitorScoopDrip TrayDrip Valve
Figure 16

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