3 Phase Frequency Converter and 3 Phase Rectified D.C. Resistance Welding Controller

Pictures of the 301B
Installed on a Machine

Remote Control Panel
(Mounted beside the Welder Face)

The Complete Setup

Features:

• Unmatched Versatility
• Programming in English. “No Codes Required”
• 6 Months Memory Retention Without Power
• Electronic Air Pressure Control
• Programmable Slope Synthesizer
• 3 Phase Line Voltage Compensator
• 140 Weld Schedules Data Retention
• Multiple Foot Switch Pedal Operation
• Program Integrity Secureable by a Lock and Key Control
• Data Storage on PC (optional)
• Serial Interface to Other Computers (optional)
• Interface With Automation Equipment (optional)
• Intertron Scanner (optional)
• Motor Control with Wheel Encoder Feedback (optional)
• 9 Channel Data Acquisition System (Model 304A, optional)

Specifications:

Welder controller cabinet with locking key, and containing the following:

• 1 Monolithic front panel with a display of 68 digits and touch keypads with visual tactile feedback.
• 1 Display front panel printed circuit board.
• 1 Processor printed circuit board, containing the microprocessor, associated memory with battery backup, parallel and serial I/O ports, variable baud rate, cassette interface circuits, visual INPUT/OUTPUT diagnostics, computer memory diagnostics, independent 3 phase line voltage monitoring and compensation, and the voltage generators for programming WELD and FORGE pressure.
• 1 Peripheral interface printed circuit board, containing the internal power supplies, the solid state relays for valve solenoid operation, the INTERTRON transceiver, and the SCR/IGNITRON pulse amplifiers.

Physical Specifications:

• Input voltage and power consumption: 220/240/440/480 VAC 60 HZ – 15 watts
• Operating temperature: 0 to 60 degrees Centigrade
• Weight: 24 lbs.
• Physical Dimensions: 12 1/4″h x 20 1/2″w x 6 1/2″d

Standard Features:

• Control Features:
• Weld / No Weld, Repeat / One Shot, Tip / Wheel Dress, Foot Switch Lock, Motor ON and 110VAC/30VA Outputs for controlling up to seven valve solenoids and relays
• Water Saver Timer. Shuts itself off when head is raised.
• Tip Arc Relay Control
• Two Stage Foot Switch Inputs, direct connection up to four foot pedals
• Interrupt input to halt control and sound internal alarm if detects overheating, no water flow, or lack of adequate air pressure. (Detection devices not included.)
• Line Voltage Compensator manual override
• Programmable Slope in all three modes for generating complex heat wave forms
• Weld schedule program under key lock. (Operator can still vary % heat ±5% of previous heat setting.)
• Internal switch (jumper) selects Frequency Converter of Full Wave Rectified D.C. operation.
• Thumb wheel switch for instantaneous selection of 140 preprogrammed weld schedules, with all variables parameters as viewed on the front panel
• Weld & Forge psi display: 00-99
• Operating Modes: SPOT – SEAM – ROLL (intermittent drive)
• Fixed timing functions, Tip travel 20 cycles, Precompression 4 cycles
• Variable timing functions:

SQUEEZE	0-99
PREHEAT	Imp. - Cool - Heat - Heat % - Heat decay - Heat decay %	0-99
WELD	Imp. - Cool - Heat - Heat % - Heat decay - Heat decay %	0-99
POST HEAT	Imp. - Cool - Heat - Heat % - Heat decay - Heat decay %	0-99
QUENCH	0-99
TEMPER	Imp. - Cool - Heat - Heat % - Heat decay - Heat decay %	0-99
HOLD	2-99
OFF	0-99
FORGE	Hi - Low - Var. Delay Start	000.0-999.9

• Standard components supplied with each system:
• Welder controller cabinet
• Power distribution transformer
• Ignitron firing modules, or SCR firing modules

Optional Features and Components:

• RS 232 Interface for downloading, storing, and editing weld schedules on a PC.
• Interlock Scanner. It interlocks the operation of up to ten controllers per scanner for sequential welding.
• Interface for control from a central computer.
• SCR firing package
• IGNITRON firing package
• Motor control with wheel surface speed encoder feedback
• Model 304A Data Acquisition System
• Model 350A Electronic Air Pressure Controller