Motoman XRC Series - Page 4

SpotWelding Manual for Medar ii MOTO MAN
3.7 Current Control Methods............................................................................................ 3-10
3.7.1 Automatic Power Factor ................................................................................ 3-10
3.7.2 Automatic Voltage Compensation Mode ....................................................... 3-10
3.7.3 Constant Current Mode ................................................................................ 3-11
4 SETUP AND OPERATION
4.1 Setting Up Parameters .................................................................................................. 4-1
4.2 Set Up........................................................................................................................... 4-4
4.3 Simple Weld Condition Files ........................................................................................ 4-5
4.4 Enhanced Weld Schedules............................................................................................ 4-6
4.5 Stepper Condition Files ................................................................................................ 4-7
4.6 Monitoring Weld Results .............................................................................................. 4-8
5 TROUBLESHOOTING
5.1 Medar Alarms and Errors.............................................................................................. 5-1
5.2 XRC Alarms and Errors................................................................................................. 5-3
5.3 Troubleshooting Welding Problems .............................................................................5-4
5.4 Tips for Producing Quality Welds ................................................................................. 5-5
5.5 Troubleshooting Dual Port RAM I/O ............................................................................. 5-6
A ROBOT I/O...................................................................................................................................A-1
LIST OF FIGURES
Figure
Page
Figure 1-1 XRC and Medar Integrated Weld Control................................................................... 1-2
Figure 1-2 XRC/Medar Board Interface....................................................................................... 1-3
Figure 3-1 The Weld Cycle.........................................................................................................3-2
Figure 3-2 Primary vs. Secondary Voltage.................................................................................. 3-3
Figure 3-3 Reactance, Impedance, and Power Factor ................................................................. 3-4
Figure 3-4 AC Welding............................................................................................................... 3-5
Figure 3-5 Regulating Current....................................................................................................3-6
Figure 3-6 Welding Circuit with Heat Loss.................................................................................3-7
Figure 3-7 Shunting ................................................................................................................... 3-8
Figure 3-8 Normal vs. Mushroomed Electrode Surface .............................................................. 3-8
Figure 3-9 Welding Different Part Thicknesses........................................................................... 3-9
Figure 3-10 Stepper Program.......................................................................................................3-9
Figure 3-11 Automatic Power Factor .......................................................................................... 3-10
Figure 3-12 Automatic Voltage Compensation (AVC)................................................................. 3-11
Figure 3-13 AVC Mode (top) vs. Constant Current Mode........................................................... 3-12
Figure 4-1 Simple Weld Condition File ...................................................................................... 4-6
Figure 4-2 Enhanced Weld Condition File..................................................................................4-7