Entron EN1000 series

Page 112 • 700120S • ENTRON Controls, LLC.
9.3 BRAZING APPLICATION
Brazing operations differ from spot welding operations in that a much longer heating time may
be required. This is because a much larger area must be raised to the melting temperature of the
brazing material. Depending on the mass of the parts to be brazed, this time may vary from
several cycles to several seconds. The EN1000/EN1001 Controls can be operated in two
BRAZING modes: AUTOMATIC for short brazing times and MANUAL which is most useful
for long brazing times.
9.3.1 AUTOMATIC BRAZING MODE
For the AUTOMATIC BRAZING mode, the EN1000/EN1001 is initiated in the same manner
as for SPOT welding. However, it must be programmed through the EXTENDED FUNCTIONS
for BEAT INITIATION DURING SQUEEZE AND WELD, in accordance with instructions in
Section 5.4.8. For convenience, these instructions are repeated here.
To program for BEAT DURING SQUEEZE AND WELD:
1. Put the control in PROGRAM mode.
2. Use SELECT to find
EFEF
EFEF
EF.
3. Use the SCHEDULE push buttons to find
b.E.b.E.
b.E.b.E.
b.E.
4. Use the DATA push buttons and make
b.E.b.E.
b.E.b.E.
b.E.=
0202
0202
02.
5. Press ENTER.
In this mode, the initiation must be held closed for the time required to bring the parts to the
required brazing temperature. If this time is longer than 99 cycles, two or more schedules must
be CHAINED together. If the operator then opens the initiation, the brazing current turns off
immediately and the sequence advances to HOLD time, and after HOLD time the electrodes
retract. The control will terminate the weld sequence normally at the end of the programmed
schedule if the initiation switch remains closed.
9.3.2 MANUAL BRAZING MODE
For the MANUAL BRAZING mode, BEAT INITIATION DURING SQUEEZE AND WELD
is also programmed as above. In addition, set WELD/HEAT and IMPULSES to
9999
9999
99, PERCENT
CURRENT and VALVE MODE in accordance with job requirements, and all other parameters
to
0000
0000
00. Initiation switches are connected to TS1 as shown in Figure 9-10.
Operation in this mode is as follows: When First Stage is closed, brazing electrodes close on the
work. When Second Stage is closed, brazing current comes on. If Second Stage is opened,
brazing current stops, but electrodes stay closed. Current may be turned on and off in this
manner as many times as desired by operator. When First Stage is opened, electrodes retract.
Figure 9-10. Using Two Stage initiation in BRAZING mode