21
Manual Grinding Wheel 2928 00
If the water collection container is equipped with
an overflow hose, this may make pulling the container
forwards difficult.
3. Push the water collection container back under the instrument (Fig. 12/1)
and lower the instrument.
7.2.2 Filling the water tank
Grinding ophthalmic lenses with water cooling depends
on the material (e.g., silicate glass or CR39). Other ma-
terials (e.g., polycarbonate or Trivex) may only be ground
while dry.
Personnel: Specialized personnel
1. Fill the water tank (Fig. 13/1) with cold water up to about 1 cm below the top
Fig. 13: Attach water tank
2. Place the water tank (Fig. 13/1) on the attachment surface (Fig. 13/2).
Ensure that the outlet of the water valve (Fig. 14/2) is located over the hole in
the sponge (Fig. 14/3).
1. Adjustment knob
2. Outlet
3. Hole in sponge
Fig. 14: Water valve
3. Adjust the flow rate of the water using the adjustment knob (Fig. 14/1, arrow).
•
Turning the adjustment knob in a clockwise
direction increases the flow rate.
•
Turning the adjustment knob in an anticlockwise
direction reduces the flow rate.
Water tank method
The water tank method requires 2 to 3 drops per second
with a running grinding wheel. This is adjusted using the
adjustment knob (Fig. 14/1, arrow) for the water valve.
Close the valve if you want to switch the instrument off..
Operation
