Amada TC-W100A, Operation Manual

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CHAPTER 1: SYSTEM DESCRIPTION
TC-W100A - THERMOCOUPLE WELDER
990-070 1-5
Initiation
The Handpiece must be correctly inserted into the Weld Chamber to initiate firing. The two
thermocouple wires loaded in the Handpiece must touch the Arc Button located inside the Weld
Chamber in order to initiate a weld. The firing sequence ensures that the Handpiece is double earth
grounded for maximum operator safety. Internal power supply filtering prevents premature firing due to
radio frequency interference.
Safety Features
Double earth grounded techniques eliminate the possibility of electrical shock to the operator. The
Handpiece used to hold the thermocouple wires is earth grounded to the TC-W100A chassis using a
non-removable cable. The length of the cable prevents injury to the Handpiece should it fall off a table
or bench that is a minimum of 30 inches high. When the Handpiece is placed in the Weld Chamber, a
solenoid mechanically clamps the Handpiece, creating a second earth ground path.
Physical Dimensions
BODY LENGTH 4 inch (10.16 cm)
BODY DIAMETER 3/4 inch (1.91 cm)
WIRE CLAMP LENGTH 3/4 inch (1.91 cm)
WIRE CLAMP DIAMETER 1/4 inch (0.64 cm)
WEIGHT 0.2 lb (91 gram)
Argon Purge Gas
Thermocouple welding is performed in an argon filled Weld Chamber which is located on the center,
upper face of the TC-W100A. Argon purge gas is necessary to prevent thermocouple joint oxidation
during the welding process.
NOTE:
Nitrogen is not effective as a purge gas.
Gas Flow
3 cubic feet per hour, nominal.
Argon Purge Gas Shutoff
An internal solenoid valve blocks the flow of argon purge gas to the Weld chamber when input power to
the TC-W100A is turned off.
NOTE: For this system to be economical, the user must eliminate all leaks in the gas system feeding
the TC-W100A. When the input power is on, gas flow is continuous. An internal gas reservoir, located
between the purge gas input connector and the shutoff solenoid, stores a sufficient amount of argon
purge gas to immediately clear out the Weld Chamber when the TC-W100A is turned back on.