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Distance settings, 21 distance settings – Sonics GXL User Manual

Page 22

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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

21

DISTANCE SETTINGS

There are 7 distance parameters that can be specified. To better understand

the distance parameters and corresponding terms used, please see the

diagram below and note the following definitions.

Home Position: when the converter head assembly is in the full up

position, not in contact with the parts to be welded. The home (head up)

position is equivalent to the linear encoder 0 position and is used as the

distance reference for the absolute distance set point.

Pre-trigger Position: when the system begins to travel and crosses

the Pre-trigger position, ultrasonics will be turned ON (this will be prior to

making contact with the parts to be welded).

Contact Position: the position at which the horn has contacted the top

of the parts to be welded and pressure is applied. If the parts and system

are in position and engaged properly, the contact point will be found

within the “pre-weld window” (see below). The contact point is also used

to reference the incremental distance set point.

Pre-weld Window: The pre-weld window is defined by two settings,

the Pre-Weld Limit Low (4L) and the Pre-Weld Limit High (4H). (See the

parameter list that follows for additional information.) If the window has

been defined and programmed, the contact point would ideally occur

somewhere in between these two settings. (Remember that increasing

distance settings corresponds to downward travel and the “0.000”

position corresponds to the horn position all the way “up.”) The purpose

of the pre-weld window is to prevent the system from welding fixtures in

case no parts have been loaded, if the parts are not engaged properly or

HEAD UP/

INITIAL TRAVEL

CONTACT

WELD

HORN

HORN

HORN

1

2

3

4L

6

4H

5L

5H

PA

RT

B

PA

RT

A

PA

RT

B

PA

RT

A

PA

RT

WE

LD

ED

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