Briot emotion, Operation Manual

Page: 86 / 210

Using your Edger... Special cases
3-85
3.5.5.6 P
RODUCE A MANUAL GROOVE
3.5.5.6.1 P
RINCIPLE
>
You wish to visualise the lens thickness and define the curve and the position of the groove.
3.5.5.6.2 P
ROCEDURE
To produce a manual groove:
1. Start the edging process
2. Enter its characteristics.
3. Proceed as shown on the flow chart ”Producing a manual groove 3-12”.
3.5.5.6.3 H
INTS

When the edging cycle is finished, remove the lens from the edging chamber without removing the block
so as to be able to retouch it if necessary.

Check the lens dimensions and finishing.
3.5.5.6.4 I
MPORTANT NOTES
> Only plastics can be grooved.
>
The minimum thickness of the lens must be equal to or greater than 1mm to produce a groove.
> The groove position can be modified in 4 ways: Right or left offset, width and depth modifications. Only the
middle of the groove is displaced along this point. The opposite side remains fixed and the curve of the groove
is unchanged.
>
The relationship between the minimum Lens face - Groove edge distance and the depth of the groove will
always be adjusted automatically to guarantee the lens resistance.
3.5.5.6.5 L
IMITS
> If the maximum thickness of the lens is less than 2 mm, the applied groove will automatically be of 50% type,
whichever type of groove is selected initially.
> To make a groove of any type, the minimum distance between the front face of the lens and the front edge
of the groove (or the rear face and rear edge) must be greater than 0.4 mm. If it is less than 0.4 mm at any
point of the lens, the groove will not be produced.
>
The safety-bevel(s) of a grooved lens will be maintained if the retouch value is less than 0.2mm to the
diameter.
3.5.5.7 F
EEL THE LENS AGAIN
> If the diameter of the lens being felt is too small, the warning message "Lens too small" is displayed and you
transfer to the manual finishing screen.
You may then feel the lens three times successively. The lens is felt 0.5 mm closer to the interior
each time.
If the three successive feeling operations are not enough, the lens is too small and cannot be edged.
Confirm the message.
Complete the cycle and retrieve the lens.
> If irregular points have been detected during the first phase of the cycle, the message "Irregular points" is
displayed and you transfer to the manual finishing screen. We advise you to repeat the lens feeling cycle.