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 Step 3. Screw in the provided brass extender with internal M3 tread onto the shaft thread and fix it with the provided set screw. |
 Step 4. Remove the coarse focus knob by unscrewing the three screws. |
 Step 5. Attach the base plate of the focus drive instead of the coarse focus knob with the provided M3-16 screws and star washers |
 Step 6. Put two provided washers (ID 1/2", OD 7/8", Th. 1/16") on top of the wavy spring washer, then pull the flexible coupling onto the shaft and fix it tightly. Take care not to push the focus shaft out of the microscope body by applying pressure to the focus knob on the other side of the microscope. |
 Step 7. Pull the focus drive sleeve until the set screw holes align with the groove in the base plate, insert the set screws and tighten them. |
 Step 8. Tighten the set screw holding the motor in place, then tighten the set screw holding the back cover. |
