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CHAP.
3
KEYTOP LAYOUT
The basic layout of this programmable keyboard is a matrix with 8 rows and
14 columns to provide maximum 112 keys with the 6 position control key. However,
there are means for the user to break the monotony and to improve the efficiency in
application of this programmable keyboard.
First of all, there are 4 legend sheets of different colors in the accessory bag
that the user may want to print the identification for each programmed key into each
cell of the sticker matrix and then stick each cell printed with the identification onto
the surface of the corresponding key top. A key cap from the accessory bag can be
snapped on the key top to protect the sticker (ref. Fig. 3-2). In this way the user may
feel a lot easier in using the programmable keyboard.
At the bottom of the programmable keyboard, the user may find an adjustable
key clip which can be used to pick up the key cap whenever required (ref. Fig. 3-2).
The two “feet” of the key clip should be pulled wide for use with double key and quad
key (ref. Fig. 3-5). It is advisable to use a flattop (minus sign) screw driver to help
getting the key top off when necessary (ref. Fig. 3-2, 3-3 and 3-4).
Whenever there comes the need to install a key top onto the programmable
keyboard, the user should notice that at the bottom of each key top, one of the four
walls is springy and in the hole on the keyboard to accept the bottom of the key top
there is a protuberance at the lower side. The user should match the springy wall of
key top against the protuberance in the hole (ref. Fig. 3-6) and press the key top down
till a click sound is heard. The key cap (except the blank key) should be placed after
the printed label is stuck onto the key top.
Among the options available for this programmable keyboard is a set of
“numerical keys” which is composed of 12 individual keys each is preprinted with one
from the set of “0”, “00”, “.”, “1”, “2”, “3”, “4”, “5”, “6”, “7”, “8” and “9”. These
numerical keys are molded in a little different shape from the normal individual keys
and are suitable for the user to create a particular “numerical keypad” at any zone on
the programmable keyboard which is convenient to the user (ref. Fig. 3-7).
Furthermore, there are blank keys available which the user can use to form
visible partitions or clusters of key tops on the programmable keyboard. When the
user wants to make a group of keys on the programmable keyboard clearly separated
from the rest part of the keyboard for certain specific application, he/she can use the