WTC MedWeld 5000, Technical Reference Manual

Page: 20 / 120

MedWeld 5000 Overview
1 - 2 MedWeld 5000 Technical Reference Manual
M-032170
the timer unit. It also provides fault detection. Finally, mid-frequency
conversion reduces the size of the welding transformer and the power
line demand required.
•
SPC data (Group, bin and part number)
This data can be reviewed this data with a programming device
(such as the WTC DEP-100S Hand-Held Terminal), or use it for
data analysis by programs such as WTC’s WebVIEW.
• Sequence number executed
• Transformer turns ratio
• Minimum, average and maximum DC bus voltage
• Minimum, average and maximum secondary current
• C-factor
• Average on-time
• Number of cycles in the last weld
• Line cycle or milisecond timing
• Stepper data and
• Desired constant current.
The MFDC is different from “traditional” single-phase welding and
high-frequency DC welding in the following ways:
•
There is essentially no power factor or impedance in high-
frequency welding that corresponds to the power factor issues of
AC welding. The power factor is high and constant, and the welder
transformer secondary circuit is direct current (DC).
• The welding transformer depends on the applied voltage and circuit
resistance. It is generally independent of the magnetic effects of the
secondary circuit. (Magnetic material in the secondary is not a
consideration.)
• Given a constant applied voltage, the weld current depends
primarily on the resistance of the weld itself. (Welds with different
resistances will result in different weld current.)