MedWeld 4000 Operator’s Guide
Modified: 9/17/08
7 - 1
M-032116 Programs #T03300, #T02300 and #T02400
Advanced Software Features
7
This chapter describes some of the advanced features of the MedWeld
4000 control.
C-Factor
C-Factor
is the value of current obtained for each
change
in percentage
of the maximum secondary current delivered. C-Factor equals 1% of the
total available current during a weld.
The C-Factor can be used in various ways:
•
It can be used as a conversion factor between %I values and the
actual value of current that would be produced.
•
A change in C-Factor will indicate changes in the welding
environment.
The actual C-Factor is calculated by the MedWeld 4000 after every
weld. The programming device displays this value in the Weld Data
display.
The processor calculates C-Factor is by dividing the average secondary
current during the weld by the %I fired. The following formula shows
this:
where
n
= transformer turns ratio.
The C-Factor varies with changing conditions in the secondary.
Decreasing C-Factor indicates that the total capacity of the system is
decreasing. This is evident when the tool current pathways become
more resistive. This, in turn, results in deterioration in the secondary
circuit. (Two examples of this are cable wear and deterioration of
connections.)
C-Factor = I x x = x
pri
n
%I
I
%I
sec
V
nominal
V
line
V
nominal
V
line
