Essilor Pro-B 300, User Manual

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Refer to the centering procedure for the particular type of lens:
• Centering a single vision lens
(
F
p.46)
• Centering a progressive lens
(
F
p.51)
• Centering a bifocal lens
(
F
p.57)
• Centering an executive lens
(
F
p.59)
• Centering a mid-distance lens
(
F
p.61)
8. B
LOCKING A LENS
The tracer is set to a WECO posiblock usage by default.
To set the limit values based on the posiblocks used, see the section Set tracer-centerer-blocker/Blocker>
Customize tracer > working mode and Display Metrics
(
F
p.104)
.
Prerequisite:
• The lens must be centered.
• Use the posiblock adapted to the shape.
Fit the appropriate pad on the posiblock, making sure to align the pad lug with that of the posiblock.
• The pads are non re-usable.
• Do not stick pads on posiblocks in advance as they may loose some of their holding power.
• The posiblock must never be placed on the rear (inner) surface of the lens.
Position the posiblock in the blocking head.
Press to start the blocking.
The blocking arm places the posiblock on the lens at the shape Boxing center.
The lens is blocked.
For a hydrophobic lens, press with your fingers on the posiblock so that it adheres to the lens
properly.
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> III. C
ENTERING A LENS
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Pro-B 300 > v1.0 - 03.19