Amada Miyachi Unitek STA-100A, Operation Manual, Page: 29 / 154

STA SERIES AC CONTROLS
990-351 3-1
CHAPTER 3
USING STA SERIES
CONTROL FUNCTIONS
Section I: Overview
To ensure accurate, consistent welds, the Control delivers extremely precise pulses of energy to the weld
head. Each pulse is comprised of weld-time and weld-energy values pre-programmed by the user. The
Control with optional primary or secondary current coils is a closed-loop welding control using internal
or external sensors to measure the weld-energy delivered to the weld head. Weld-energy feedback
instantly goes to the Control's logic circuits that actively correct the pulse to compensate for any
variation in part resistance. The Control also has several monitor functions that give you remarkable
control over the welding and production process. Together, these features ensure precise, consistent
welds, higher productivity, a lower rejection rate, and longer electrode life.
The Control contains internal software that gives you a great deal of flexibility in the setup and use of
your welding system. The Control software displays various menu screens on the LCD, each containing
prompts telling you which of the Control's front panel controls to use in order to customize operating
parameters, set the Control for use in an automated welding system, and program communication
settings if you are using the optional Communication capability.
This chapter describes Control functions in the following sections based on the LCD screens:

Schedule Screen

Valves Screen

Monitor Screen

Monitor Counts Screen

Mode Screen

Linked Schedules Screen

System Wide Values Screens (3)

System Valve Status Screen

Force Calibration Screen

Stepper Screen
Before programming the Control, you must be familiar with the location and function of the LCD and
front panel controls. If you need more information on these controls, see Chapter 1, Description .
Chapter 4, Operating Instructions , contains the step-by-step instructions on how to program each of the
functions above.