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Exatron 3000B
www.exatron.com 5-20 Chapter 5 Diagnostics
5.
BEGIN MOVING THE PLUNGER DOWN USING THE
[6]
KEY FIRST, then the other keys as
needed. Stop when you can see the pick-up head just start to compress against the gate as viewed
from above the plunger.
6.
PRESS THE
[Enter]
BUTTON to start the self-adjust operation.
7.
THE HANDLER WILL DISPLAY
JOG DOWN
, QUICKLY FOLLOWED BY
JOG UP
. The plunger will
jog down until the pick-up head trips the test site sensor. The index section will singulate a device
which will come to rest against the pick-up head. The plunger will jog up enough to allow the DUT to
fall into position in the test site.
8.
THE HANDLER WILL DISPLAY
Z DOWN - PART TOP
, The plunger will then jog an additional three
steps up to allow enough clearance for the DUT to rest against the pick-up block's stop. The vacuum
will then turn on and hold the device against the pick-up block.
9.
THE HANDLER WILL BRIEFLY DISPLAY
FOUND PICK UP
, The plunger will begin to jog up in the Z
plunger assembly.
10.
AS IT DOES, THE HANDLER WILL DISPLAY
UP STEPS = 000
.
This number, 000, will scroll up
in value as the plunger moves up.
The plunger will continue to jog up until the top position micro
switch is closed.
11.
ONCE THE MICRO SWITCH IS CLOSED: The handler will display the
UP STEPS =
message with
the
actual number
of steps required to close the switch.
Note that there is a limited range of steps within which the plunger must close the top position
micro switch. The minimum number of steps is 10. The maximum number of steps is 50.
12.
IF THE NUMBER OF STEPS THE PLUNGER MOVES IS NOT WITHIN RANGE: The handler will
display
ADJ Z SWITCH
. The switch itself must be moved so that the plunger will stop within the
defined range.
13.
THE Z PLUNGER ADJUSTMENT OPERATION IS NOW COMPLETE. To exit the self adjust routine
and return to Manual Mode, press the
[Clear]
button on the handler controller keypad.
REMEMBER: The closer the number of steps is to 10, the shorter the distance the plunger will have to
move in order to intercept the DUT. This slightly speeds up the whole production cycle by minimizing the
pick-up cycle and plunge-to-board depth.