Tweco Eliminator Spool Gun - Manual (Page 18)

5-14
safety and operating instructions
89200011
SECTION 5:
ESG-1 (STOCK NO. 1028-1295)
The ESG-1 is a solid state control for the Tweco Spool gun assembly. It's responsible for the
on/off flow of shielding gas to the gun including pre-flow and post-flow, the on/off flow of the
welding current from the power source, the run-in speed of the filler metal during arc initiation,
and the constant wire feed speed of the filler metal while welding.
Front Panel Controls & Connections
1. Located on the front panel are three (3) potentiometers that allows control of the following
functions;
t-1 - This knob is used to select the amount of pre-flow time desired. The range of pre-
flow time control is 0 - 2.5 seconds.
t-2 - This knob is used to select the amount of post-flow time desired. The range of post-
flow time control is 0 - 2.5 seconds.
O/O - This knob controls the run-in speed of the filler metal towards the workpiece.
2. Spool gun connection (GAS) - the spool gun gas fitting plugs into this connection. Shielding
gas is delivered to the spool gun through this connection.
3. Spool gun connection (CONTROL) - The spool gun control cable plugs into this receptacle.
The ESG-1 and the spool gun communicate with one another through the following pins:
a) Pin A - Motor Voltage (+)
b) Pin B - Motor Voltage (-)
c) Pin C - Gun Switch Output
d) Pin D - Wire Feed Speed Maximum
e) Pin E - Wire Feed Speed Reference
f) Pin F - Wire Feed Speed Minimum
Spool Gun
Connection
(CONTROL)
Spool Gun
Connection
(GAS)
Pre-Flow
Control
(0 - 2.5 sec)
Post-flow
Control
(0 - 2.5 sec)
Run-In
Speed
Control
Figure 5-1: Front Panel Controls and Connection
ESG-1