Tweco HMC-410 - Manual (Page 56)

HMC-410
4-14 July 27, 2005
Cycle — one execution of a weld schedule
Schedule — collection of weld parameters describing
a weld procedure
SCHEDULE
SUB SEGMENT
SEGMENT
ONE CYCLE = ONE TIME THROUGH
THE SEQUENCE
Art # A-04368
Figure 4-1: Programming the HMC-410
Segment Programming
The details of programming each of the HMC- 410’s
segments are discussed in this section. Additionally, the
function of each segment is defined. The segments are
discussed in the order in which they would occur during
a weld cycle. The segments are selected by rotating the
MODE SELECT encoder. The segment selected is shown
by the light lit next to the segment.
Ready
The ready segment is not actually part of the weld
sequence. The top two displays of the ready segment
display the accumulated arc hours on the control panel.
The bottom display allows the operator to select the
schedule to be viewed, programmed, or executed.
Preflow
The preflow segment is programmed in time and is the
delay time before the start of run in and initiation of the
arc. The gas valve is turned on at the beginning of preflow
and remains on through the completion of postflow. The
time is programmed in the upper display. The range is 0
to 25.5 seconds, in .1 second increments.
Run In
The run in segment has three programmable parameters;
the strike time or time allotted to strike the arc, voltage,
and WFS. Each of these signals is output at the beginning
of run in and remains constant until the next segment is
executed. If the arc is detected within the programmed
time, execution passes to the weld segment. If the arc is
not detected within the programmed time, the cycle will
be terminated and the control will return to the ready
segment and the ready mode.
The run in time is programmed in the upper display. The
time can be programmed from 0.2 to 25.5 seconds, in .1
second increments.
The voltage is programmed in the center display. The
voltage can be programmed from the minimum
programmable voltage (0 to 10.0) to the maximum
programmable voltage (between 36.0 and 44.0), in .2 volt
increments.
The WFS is programmed in the bottom display. The WFS
can be programmed from 0 to 8881 IPM (0 to 22.5 MPM),
in 4 IPM (.1 MPM) increments (888 is displayed, but the
actual limit is 887 IPM).
Weld
The weld segment is responsible for the major portion of
the weld cycle. This segment has three programmable
parameters: time, voltage, and WFS. If the time is selected
to be continuous (CON in the upper display), the panel
requires the operator or master control to issue the stop
command to enter the crater fill segment. If the
programmed time is not continuous, the weld cycle is a
timed spot weld and will automatically proceed to the
crater fill segment after the weld time has expired.
The weld time is programmed in the upper display. The
time can be programmed from .1 to 25.5 seconds, in .1
second increments. When CON is displayed, the
continuous weld is selected. When OFF is displayed, that
weld sub segment is disabled. The various weld sub
segments are selected in the recycle segment.
The voltage is programmed in the center display. The
voltage can be programmed from the minimum
programmable voltage (0 to 10.0) to the maximum
programmable voltage (between 36.0 and 44.0), in .2 volt
increments.