User Manuals: Miyachi Unitek 250DP/208 Welding Power

Manuals and User Guides for Miyachi Unitek 250DP/208 Welding Power. We have 1 Miyachi Unitek 250DP/208 Welding Power manual available for free PDF download: User Manual

Miyachi Unitek 250DP/208 User Manual

Miyachi Unitek 250DP/208 User Manual (92 pages)

DUAL PULSE STORED ENERGY RESISTANCE WELDING POWER SUPPLIES

Brand: Miyachi Unitek | Category: Power Supply | Size: 2 MB

Table of Contents

Revision Record
2
Table of Contents
3
Contact Us
9
Safety Notes
10
Chapter 1: System Description

13
- Applications
  13
- Features
  14
Chapter 2: Installation

17
- Location
  17
- Power Line
  17
- Welding Cables
  17
- Cable Routing Examples
  18
  - Rear Panel Components
    19
  - Firing Switch Connections
    20
    
    Mechanical Firing Switch
    20
    
    Optical Firing Switch
    20
    
    Wire Firing Switches
    20
  - Air Actuated Weld Head Connections
    21
    
    Air Valve Driver
    22
    
    Air Actuated Weld Heads Without Force Firing Switches
    23
    
    Second Air Head
    23
  - Footswitch
    23
    
    1-Level Footswitch
    23
    
    2-Level Footswitch
    24
  - Remote Schedule Selection
    24
  - Relay Outputs
    24
  - Interconnection Diagram
    25
Chapter 3: Operating Controls and Screens

27
- Operating Controls
  27
- Screen Formats
  29
- Screen Flow Chart
  31
Chapter 4: Getting Started

33
Chapter 5: Operating Instructions

39
- Successful Welding
  39
- Resistance Welding Parameters
  39
- Weld Schedule Development
  39
  - Weld Head Parameters
    40
    
    Recommended Electrode Materials
    41
    
    250DP Power Supply Parameters
    42
- Making a Weld
  42
- Evaluating the Weld
  42
  - Weak Weld
    43
  - Electrode Sticking
    43
- Causes of Imperfect Welds
  43
  - Electrode Force and %Energy
    43
    
    Polarity
    44
- Weld Strength Profiles
  45
- Destructive Testing
  45
- Electrode Maintenance
  46
Chapter 6: Process Definitions and Weld Functions

47
- 250DP States
  47
  - RUN State
    47
  - STANDBY State
    48
  - PROGRAM State
    48
  - MENU State
    49
  - HELP State
    50
  - NO WELD State
    50
  - FIRE State
    50
- Weld Function Field
  50
  - Basic Function
    51
  - Repeat Function
    52
  - Rollspot Function
    53
Chapter 7: Maintenance

55
- Modification and Calibration
  55
  - Cover Removal
    55
  - Capacitor Bank Modifications
    55
  - Line Voltage Changes
    56
- VAC Line Voltage Configuration
  58
- VAC Line Voltage Configuration
  59
- VAC Line Voltage Configuration
  60
- VAC Line Voltage Configuration
  61
  - Calibration
    62
  - Power Supply Voltage Range Specifications
    63
  - Troubleshooting
    64
  - Repair Service
    65
    
    Factory Service Repair
    65
    
    Telephone Service
    65
Appendix A: Technical Specifications

67
- 250DP Power Supply
  67
- Power Requirements
  67
- Capacitor Bank
  67
  - Output Pulse Characteristics
    67
  - Weld Fire Lockout
    68
  - Line Voltage Regulation
    68
  - Turndown Circuit
    68
  - Line Failure Turndown
    68
  - Over-Voltage Lockout
    69
    
    Charge Lockout Circuit
    69
- Polarity Selection
  69
- Welding Speed
  69
- Weld Schedules
  72
  - Weld Schedule Definition
    72
- Options
  72
  - Schedule Number at Power-Up
    73
- Utilities
  73
- Information
  73
- Weld Sentry
  73
- System Setup
  74
- Weld Functions
  74
- Head Type
  74
  - Squeeze Line
    74
  - Cool Time
    75
  - Hold Time
    75
- Footswitch Type
  75
  - FOOTSWITCH Connector
    75
- Footswitch Weld Abort Feature
  76
  - Footswitch Weld Abort on
    76
  - Footswitch Weld Abort off
    76
- Firing Switch Type
  76
- Initiation Switch
  78
  - Manual Head Operation
    78
  - Air Head Operation
    78
- Chain Schedules Feature
  78
  - Step Count
    78
  - Next Schedule
    79
- Audible Buzzer
  79
  - End of Cycle Buzzer ON/OFF
    79
  - Key Click
    79
- Weld Counter
  80
- Alarms
  80
- Air Valve Driver 1
  80
  - Air Valve Driver 2
    81
  - Air Valve Driver Receptacles
    81
- Control Signals Connector
  81
  - Emergency Stop
    82
  - Charge (Process) Inhibit
    83
  - Remote Weld Schedule Selection
    83
    
    Binary Schedule Selection Code
    84
- Relay Outputs
  85
- Accessory Port
  86
- Input/Output Cable Connectors and Fusing
  86
  - Input Line Power
    86
  - Circuit Breakers
    86
  - Fuses
    86
  - Power Input Connector
    86
- Front Panel Switches
  87
- Microprocessor CPU
  87
- Display
  87
- Cooling
  87
- Physical Characteristics
  88
- Index
  89

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