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                                                Figure 10

              c.  Place the large arm with rollers facing up on the post that is forward and on the right side of the lapping plate.

1. 1. 1. Clean the test block with a kimwipe and isopropyl alcohol.
      2. Place the test block with the weight on top in the arm so that it is flat on the lapping plate and is touching the rollers on the arm (Fig. 11).
      3. Adjust the arm so the edge of the test block is touching one of the sides of the center cross (Fig. 11).
      4. Tighten the arm down. None of the set screws should be touching the lapping plate if there are; adjust the arm up.

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                                                   Figure 11

              d. WeightTest BlockLarge ArmDrip Wires Image Removed
Figure 11 Remove the center cross.

              e. On the Please Set Jig Positions screen (Fig. 9) select and press OK.

CHECKING LAPPING PLATE FLATNESS

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1. On the Operating screen (Fig.12), move the joystick up and to the right. Select Abrasive and press ok.

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Figure 12

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

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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.
2. 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. 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.
         1. 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.
3. Move the joystick down and select and press OK.
4. On the Operating screen (Fig. 12) move the joystick up and select Set Time. Press ok.
5. On the Timer screen (Fig. 14)
   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.

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