Micromat MM 470A, Operator'S Manual

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Section
41
INITIAL SETTING
1) Position some black/white artwork securely on the table, switch PROG on and drive the
TV target to one of the pad pips.
2) Switch the "ASCOPP" function switch to "M" and the control switch to "ON" and
ensure that the small square to the lower left of the target comes on when the pad pip is
within the inner target ring. The black/white sensing switch on the rear panel must be in
the correct position for the artwork being viewed.
UP will sense WHITE pips and DOWN will sense BLACK.
Two controls are available above the sensing switch on the rear panel and are to be adjusted
to suit the contrast of the subject being viewed. The upper control is for WHITE pips, the
lower is for BLACK. The appropriate control should be adjusted to achieve the fastest
centering time on a typical pip. Once adjusted to suit a particular subject and light level,
similar subjects should not require further adjustment.
3) Press HOLE, and the target will move and lock onto the pad pip. If it is not central then
continue pressing HOLE while adjusting the slotted centering control to the left of the
black/white sensing switch on the rear panel until the small cross is in the centre of the
pad pip. As long as the rest of the artwork has a similar black/white contrast ratio then
no problems should be encountered using "ASCOPP" on that artwork.
The optimum distance for satisfactory operation will vary with overall pad size, but as a
general rule the small cross in the centre of the target should be touching the pad pip before
the HOLE button is pressed.
For best results a positive or negative film work should be used on a light background such
as white PVC. A sheet of glass should be laid on top of the film to keep it flat.
It may be possible to use printed panels if attention is paid to the relative contrast of the ink
and the background colour.
The centering and sensing controls may have to be adjusted when changing from black to
white sensing and some attention will have to be paid to the level of lighting on the
machine.
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