Sonics GXL - Manual (Page 24)

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I N S T R U C T I O N M A N U A L • M O D E L G X L P O W E R S U P P LY
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cycle and examined against a post-weld window (as explained in item 5
above), the lower limit of which is defined by this value. If the final travel
distance is less than this entry, a distance low alarm will be indicated on the
Alarm Screen display and by a flashing LED on the distance key.
Distance Limit High – sets the maximum weld distance permitted for an
assembly (presumably the maximum weld distance to be traveled to produce
a “good weld”). The weld distance is monitored at the completion of the weld
cycle and examined against a post-weld window (as explained in item 6
above), the higher limit of which is defined by this value. If the final travel
distance is greater than this entry, a distance high alarm will be indicated on
the Alarm Screen display and by a flashing LED on the distance key.
Pre-weld Limit Low – sets the minimum position during pre-weld travel
where the parts should be found. The pre-weld distance is monitored against
an allowable pre-weld window (as explained in item 5 above), the lower limit
of which is defined by this value. If contact occurs before this specified
position is reached, the system will retract and display a “Check Pre-weld
Limit” message.
Pre-weld Limit High – sets the maximum position at which the parts should
be found. Distance is monitored against an allowable pre-weld window (as
explained in item 5 above), the higher limit of which is defined by this value.
If contact occurs beyond this specified position, the system will retract and
display a “Check Pre-weld Limit” message.
Pre-Trigger Distance – The Pre-trigger distance is the distance that the
horn must travel before the ultrasonics are turned on. The Pre-trigger
distance must be set and the trigger selection must be “Distance.” If the Pre-
trigger distance is “cleared” or set to 0, then Pre-trigger occurs from the
Home Position. (Should the Pre-trigger distance be set further than the
distance to the parts, the system will wait indefinitely to achieve the Pre-
trigger. The Clear key can always be used to abort a cycle.)
Use the Pre-Trigger Distance feature only when pre-triggering is required.
Pre-triggering during normal welding operations may result in surface
marking.
ENERGY SETTINGS
There are 4 energy parameters that can be specified. These are accessed by
pressing the Energy key, which allows specification of the following
parameters. The first menu display will show the following:
Energy Setting – sets the amount of energy in joules to be delivered to the
parts being assembled.
NOTE: The distance limit
low/high is entered as an
absolute number if the
absolute distance set point
has been programmed. If
the incremental set point
is programmed, the
distance limit low/high
must be entered as an
incremental number. If
neither absolute nor
incremental set point is
programmed, the limit
window may still be used.
The default is absolute
mode and the entries must
be absolute (referenced
from the top).
NOTE: The Pre-
trigger distance
should not be
confused with the
Trigger key that is
used to select the
actual Trigger Mode,
BUT, in order to use a
Pre-trigger distance
setting, the Trigger
Mode must be set for
DISTANCE or the
system will not
execute the Pre-
trigger process.
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