Motoman XRC Series User Manual

MOTO MAN i SpotWelding Manual for Medar
TABLE OF CONTENTS
Section
Page
1 INTRODUCTION
1.1 About this Document .................................................................................................... 1-1
1.2 System Configuration ................................................................................................... 1-2
1.3 System Components..................................................................................................... 1-4
1.3.1 XRC 2001 Controller ...................................................................................... 1-4
1.3.2 Robot .............................................................................................................. 1-4
1.3.3 Servo Robot Gun ............................................................................................ 1-5
1.3.4 Medar Integrated Weld Control ....................................................................... 1-5
1.3.5 Water Cooling System ....................................................................................1-6
1.3.6 Tip Dresser (Optional) .................................................................................... 1-6
1.3.7 Work Cell ........................................................................................................ 1-6
1.4 Equipment and Component Specifications ...................................................................1-6
1.5 Reference to Other Documentation................................................................................ 1-7
1.6 Customer Service Information ......................................................................................1-7
2-1
2 SAFETY
2.1 Introduction .................................................................................................................. 2-1
2.2 Standard Conventions ..................................................................................................2-2
2.3 General Safeguarding Tips............................................................................................ 2-3
2.4 Mechanical Safety Devices ...........................................................................................2-3
2.5 Installation Safety .........................................................................................................2-4
2.6 Programming Safety ..................................................................................................... 2-4
2.7 Operation Safety ...........................................................................................................2-5
2.8 Maintenance Safety....................................................................................................... 2-6
3-1
3 THEORY OF OPERATION
3.1 Resistance Welding Variables....................................................................................... 3-1
3.2 The Weld Cycle............................................................................................................. 3-2
3.3 Critical Factors in Resistance Welding.......................................................................... 3-2
3.3.1 Current ........................................................................................................... 3-2
3.3.2 Voltage ........................................................................................................... 3-3
3.3.3 Ohm’s Law ...................................................................................................... 3-3
3.3.4 Secondary Resistance ..................................................................................... 3-4
3.3.5 Reactance, Resistance, and Power Factor .......................................................3-4
3.3.6 Primary Current .............................................................................................. 3-5
3.4 AC Welding ..................................................................................................................3-5
3.5 DC Welding .................................................................................................................. 3-6
3.6 Spot Welding Theory .................................................................................................... 3-6
3.6.1 Steppers ......................................................................................................... 3-9

Motoman XRC Series Specifications

General

Programming Language	INFORM III
Communication Ports	Ethernet
Power Requirements	200-220 VAC single phase, 50/60 Hz, 1.5 kVA
Mounting	Floor mount
Operating Temperature	0°C to 45°C
Humidity	20% to 80% (non-condensing)
Storage Temperature	-20°C to 60°C