Spot Welding Cabinet; Introduction - ABB IRB 6620 Product Specification

2 DressPack and SpotPack

2.6.1 Introduction

2.6 Spot Welding cabinet

2.6.1 Introduction
General
The Spot Welding cabinet for SpotPack contains the electric components and circuits
needed for spot welding application. The Spot Welding cabinet, with the welding
controller built in, is controlled from the robot controller via the process software.
The capacity and functionality depends on the choice of different option combina-
tions.
The Spot Welding cabinet is designed to be placed on top of the robot controller
cabinet (Single cabinet version option 700-3), see Figure 55 below. This is also how
it is assembled at delivery.
Figure 55 Spot Welding cabinet with robot controller cabinet.
There are interface cables between the robot control cabinet and the Spot Welding
cabinet (cable length 1,5 m, connected at rear of the control cabinet and at front of
Spot Welding cabinet). These cables includes power feeding for control circuits, pro-
cess signals to the welding gun, safety signals, communication towards weld timer
and I/O:s for indication and control. Depending on chosen options wiring will differ
(see option descriptions below for further details).
The Spot Welding cabinet has the following common main features.
86
• Modular built for easy repair and installation (see Figure 56 below)
• Rotary switch with adjustable thermal release (not for UL option) and short circuit
release
• Cross connection of signal handling with separate fusing for different circuits to achive
selectivity
• Programmable weld timer with proportional valve control
• A compact cabinet family based on a common platform prepared for additional options
and for easy exchange
Rev.E 3HAC 025861-001