Tweco Weld Sequencer - Manual (Page 26)

OPERATION 20 Manual 0-2023
4.04 RP1 Control Descriptions
1
2
3
4
5
CONTACTOR
ON
OFF
SPOTWELD
WELD
CURRENT
START
SEQUENCE
START
DOWNSLOPE
RP 1
CONTROL
A-02416
Figure 4-3 RP1 Control
1. Contactor ON/OFF Switch
Activates main contactor closure in power supply to
prepare for start of weld sequence. Must be in the
OFF position before turning sequencer to OFF posi-
tion.
2. Weld Current
Allows welding current to be adjusted within the
range set on the power supply. Can be used to set CS1
and CP1.
3. START SEQUENCE Switch
Activates sequence of CS1 and GS1 only. When GS1
is used independently, pressing switch will start
plasma gas 'upslope' sequence.
4. START DOWNSLOPE Switch
Allows manual start of plasma gas and current
'downslope' sequence.
5. SPOTWELD Switch
Allows contactor closure to be initiated at operators
discretion after the first spot weld sequence has been
completed (if the CONTACTOR ON/OFF switch is
left in ON position).
4.05 WT1 Weld Timer Control
Descriptions
WT 1 WELD TIMER
T E N T H S S E C O N D S
O N O F F
A - 0 2 4 1 7
1 2
Figure 4-4 WT1 Weld Timer
1. ON/OFF Switch
In OFF position WT1 is disabled. The ON position en-
ergizes timing circuits.
2. SECONDS-TENTHS Dial
Allows weld time to be set in seconds to the tenth of a
second up to 999.9. When WT1 is used with CS1 tim-
ing starts with start of upslope and times out to auto-
matically initiate downslope sequence.
S t a r t o f
d ow n s l o p e
S t a r t o f u p s l o p e
We l d T i m e
( 0 . 1 - 9 9 9 . 9 s e c )
A - 0 2 4 2 1
CAUTION
WT1 is set for operation on 60Hz power. For 50Hz
operation the timer must be reset (refer to Section
3.05 for 50Hz).