40
UBI EasyCoder 401 – Technical Manual
LABEL-TAKEN SENSOR, cont'd.
❑
The sensitivity of the label-taken sensor can be adjusted by
means of a potentiometer situated on the CPU board, as de-
scribed in the chapter “Electronics; Potentiometers” later in this
manual
1
.
CAUTION!
Since the adjustment must be performed with the power on, take
utmost care to avoid any risk of electrical shock or short-
circuits. Only use a non-conductive screwdriver and keep the
fingers away from the CPU board and the area behind it, where
the mains inlet and mains switch are situated.
❑
You can adjust the potentiometer randomly and check if it is
working properly by trying to print a label without removing the
previous one. Also check that you can print a label when there
is no label left under the LTS. Use the trial-and-error method
until the LTS works properly.
❑
Another way is to make a simple UBI Fingerprint program that
checks the printer's status using the
PRSTAT
function (also see
UBI Fingerprint manuals). Here is an example on how such a
program can be made:
10
BREAK 1,88
20
BREAK 1 ON
30
ON BREAK 1 GOSUB 1000
40
FORMFEED
50
IF (PRSTAT AND 2) THEN BEEP
60
GOTO 50
70
END
1000 BREAK 1 OFF
1010 GOTO 70
RUN
You can break this program by transmitting the character X
(ASCII 88 decimal) on the standard interface "uart1:".
• Leave the label, ticket etc. in the outfeed slot.
• The sensor is properly adjusted when the printer beeps
continuously. Turn the potentiometer screw a quarter of a
turn in each direction. The beeping should not stop.
• Remove the label and the beeping should cease at once.
• If necessary, adjust the potentiometer until the label-taken
sensor works as described above.
• When adjusting the potentiometer, always create a safety-
margin by turning the adjustment screw a quarter of a turn
further after the beeper has started or ceased to sound.
❑
Close the cover.
Adjusting the Sensitivity
Continued!
1
/. The intensity of the light emitted from
the LTS can be adjusted by means of a
strap on P-607 on the CPU Board:
No strap = weaker
Strap = stronger
