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PCM-875A
ESAB PCM-875A User Manual
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F-15-753
November, 2002
Installation,
Operation an
d Maintenance
Manual for the
PCM-875A Plasmarc Mechanized
Cutting System
Cutting Systems
411 South Ebenezer Road
Florence, South Caro
lina, U.S.A
.
2
Table of Contents
Default Chapter
3
Table of Contents
3
Section 1 Safety
7
Introduction
7
Safety Notations and Symbols
8
General Safety Information
9
Installation Precautions
10
Electrical Grounding
11
Operating a Plasma Cutting Machine
11
Service Precautions
15
Safety References
17
Section 3 Installation
23
Section 2 Description
23
General
23
PCM-875A Power Console
23
Technical Specifications: PCM-875A
23
Requirements
23
Dimensions and Weight
25
Remote Arc Starter (RAS2)
25
Technical Specifications
25
PT-20AMX Torch
26
Technical Specifications
26
Torch Spare Parts Kit
28
Location
30
Primary Electrical Input Connections
31
Connection of Plasma Console to CNC Interface
32
Secondary (Output) Connection
33
Mounting
37
Connecting Service Lines (Input)
38
RAS2 Output Connections
40
Installing Front-End Torch Parts
43
Section 3 Installation
45
Interconnecting Diagram
46
Section 4 Operation
49
PCM-875A Console Operation -- General
49
Console Controls
50
Ras2
52
PT-20AMX Plasma Torch
52
Cut Quality
53
Introduction
53
Cut Angle
54
Cut Flatness
55
Surface Finish (Roughness)
56
Dross
57
Dimensional Accuracy
59
Process Data
61
Travel Speed
63
Stainless Steel
70
Section 5 Maintenance
73
PCM-875A Console
73
General
73
Inspection and Cleaning
74
Flow Switch
76
General
77
Spark Gap Procedure
77
PT-20AMX Plasmarc Torch
78
General
78
Dirt or Contamination
79
Loose Consumables
79
Consumables- Remove and Replace
80
Measuring Torch Gas Flows
82
Removal and Replacement of the Torch Body
83
Section 6 Troubleshooting
85
Troubleshooting PCM-875A Plasmarc System
85
Power Light (PL1) Does Not Come on
86
No Air Flow
86
Troubleshooting
87
Poor Cutting Performance
91
Air Does Not Shut off
91
Main Arc Difficult to Start
92
Reference Voltage Checks
93
PT-20AMX Torch Troubleshooting10
94
Insufficient Penetration
94
Main Arc Extinguishes
94
Dross Formation
94
Double Arcing
95
Uneven Arc
95
Unstable Cutting Conditions
95
Main Arc Does Not Strike
95
Poor Consumable Life
95
Power Console Electrical Drawings
96
Schematic
96
Power Console Electrical Drawings
102
Remote Arc Starter Schematic
108
Section 7 Replacement Parts
109
General
109
Ordering
109
Replacement Parts
111
PCM875A Power Console - 230V
112
PCM-875A Power Console - 400V
120
Remote Arc Starter
126
PT-20AMX Plasmarc Cutting Torch
130
4
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ESAB PCM-875A Specifications
General
Protection Class
IP23
Cutting Capacity
25 mm (1 inch)
Gas Type
Air or Nitrogen
Open Circuit Voltage
300 V
Weight
92 lbs (42 kg)
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