Amada 300 Series, Operation Manual

Page: 34 / 80

CHAPTER 3: OPERATING INSTRUCTIONS
SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
3-2 990-115
Table 3-1. The Complete Weld Cycle
Step Event Linear Actuator
Action
Comments
1 Ready At UPST position. Run state. Ready to make a weld.
2
First level of the
foot switch is
actuated Moves to SRCH
position.
Slew rate is programmable: FAST, MED, SLOW.
If the foot switch is released, the head moves back
to the UPST position. By activating and releasing
the first level of the foot switch, the head moves
between the UPST and SRCH positions.
3
Second level of
the foot switch
is actuated
Moves toward weld
material.
Slew rate is programmable: FAST, MED, SLOW.
4
Electrode
touches weld
material
Force builds up to
WELD force.
The time required to reach the WELD force is
programmable. This is called the squeeze (SQZ)
time.
5
WELD force is
reached
Start signal (contact
closure) to Power
Supply is initiated and
follow-up force delay
timer (DLY) is started.
You
must
set the switch debounce time in the
Power Supply to 0 msec.
6
DLY time is
expired
Force rapidly increases
from the WELD force
to the follow-up
(FWUP) force.
Force change occurs in about 1 millisecond and
remains at the FWUP force level for the
programmed FWUP time duration. Round-to-
round or round-to-flat parts collapse (set down)
during the FWUP period. Flat-to-flat parts expand.
7
End of FWUP
time
Force rapidly decreases
back to the WELD
force.
WELD force is applied for the remaining WELD
time.
8
End of WELD
time Head retracts to the
UPST position.
Slew rate is the same as in step 2.
9
UPST position
is reached
Head remains at the
UPST position for the
duration of a hidden
STOP time, which is
automatically
determined from the
programmed and actual
force and time
information.
New weld cannot be initiated until the end of the
STOP time. Also, the foot switch must be released
and reactivated to start the next weld cycle. The
STOP time ensures that the head will not overheat.