Instruction manual
ITEM TE550
S.p.A.
COMPLETE USE OF THE STEPPER MENU FUNCTION (NON-LINEAR INCREMENT
CURVE)
It is possible to use the non-linear increment curve function by knowing the real electrodes
consumption only.
In the aforesaid work method, a linear welding current increment is used during the whole life
span of the electrodes. In actual fact the increase of the contact section of the electrode on
the sheet is not linear but has a pattern that is similar to the one shown in the graph below.
CURRENT
NUMBER OF WELDING SPOTS
IDEAL PATTERN
REAL PATTERN
WITH LINEAR INCREMENT
As such the use of the linear increment is an approximation which nonetheless permits to
achieve good results in most applications. However when the user wishes to achieve utmost
constancy during work conditions, a non-linear increment curve can be set that is described
by defining a certain number of segments.
This type of adjustment requires an adequate knowledge on how electrodes wear and on the
parameters required during their life. Consequently many welding spot tests are necessary for
assessing the work conditions in different moments of the electrodes' life.
CURRENT
NUMBER OF WELDING SPOTS
IDEAL PATTERN
REAL PATTERN WITH SET
INCREMENT CURVE
The increment curve is set by assessing a certain number of linear segments. The number of
welding spots and the desired increment are assessed for each segment.
STEPPER MENU
>TOTAL STEPS 4
SPOTS 1 00700
INCREMENT 1 19
%
The TOTAL STEPS parameter determines the number of segments to be inserted in the
increment curve. Enter the number of welding spots that make up the segment in the SPOTS
1,2… parameters. Enter the corresponding percent increment to be achieved in the
INCREMENT 1,2… parameter.
The programming procedure is outlined in the
STEPPER MENU
paragraph.
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