WTC MedWeld 3005, Operator'S Manual

Page: 146 / 206

CdU``Ub4QdQ
'" =UTGU\T# %?`UbQd_bµc7eYTUD)## "
= #" "%1`bY\" "
/LQHDU6WHSSHUV
The conventional linear stepper tracks the number of welds
completed. It increases the heat provided to the weld at several
programmed set points. This serves to compensate for drifts in
the welding process.
The stepper profile consists of a number of linear steps, and a
parameter to allow stepper grouping. Each linear step applies
additional weld current over a number of welds.
Because the stepper is linear, if a step is programmed to add 3%
current over 100 welds, it will actually add 1% after 33 welds, and
another 1% after 66 welds. (Heat is added in minimum
increments of 1%, based on the function selected.) By the 100th
weld, the stepper is adding the full 3% current boost to the
amount of current programmed in the weld function.
At the end of a weld schedule, the control will verify the stepper
that was activated to see which group it belongs to. The control
then bumps up the weld count on all steppers that are associated
to the group. (Use the DEP-100S or other programming device to
assign steppers to a group.)
For example, if one gun (tips) was used to several different
schedules using different steppers, grouping allows you to
automatically increment the stepper for every schedule in the
group every time the gun is fired.
When the control completes the last weld in the last step, the
electrode tips must be dressed and the stepper reset.
To use the linear stepper, you must include Function #82 as the
first function in the weld schedule.
>?D5*
The stepper is not active during every weld function: it is incremented
only when you execute the following functions that provide weld
current:
20 WELD 00 CY 00 %I
25 WELD 00 CY 00.0%I
26 WELD 00 HALF CYCLES 00.0%I
30 WELD 00 CY 00000 AMPS
36 WELD 00 HALF CYCLES 00000 AMPS
40 SLOPE 00 CY 00% TO 00% I
45 SLOPE 00 CY 00000 AMPS TO 00000 AMPS