ESAB ESP-200 - Page 40

40
SECTION 4 OPERATION
NOTICE
Refer to your torch manual for recommended consumables for cut-
ting at dierent amperes.
NOTICE
For the purposes of process data, the PT-19XLS and The PT-600 are
the same torch. The PT-600 is an improved version of the PT-19XLS
plasma torch. Higher manufacturing tolerances in the PT-600 result
in improved torch concentricity resulting in greater part accuracy po-
tential.
4.4 Process Data for PT19XLS/PT-26 and the ESP-200
4.4.1 Introduction to Cut Characteristics
4.4.1.1 Dross:
The quality of a cut is judged by three primary characteristics;
1. Bottom Dross and Top Spatter
2. Bevel Angle
3. Surface Roughness
These characteristics vary by many factors including the type and condition of plate material of which there is little control
such as;
plate chemistry •
coatings •
scale•
The Condition Selection Charts express the cut quality obtained in laboratory tests with a variety of materials. The informa-
tion in the charts is based on the following terminology.
Excellent - Essentially dross free with no top spatter.•
Good - Very light removable dross, or dross free with top spatter.•
Fair - Medium to heavy removable dross.•
Poor - Tenacious dross•
4.4.1.2 Bevel angle:
A slight bevel is characteristic of plasma cutting. The objective in the selection chart is to establish conditions that cause
the least angle. Bevel angle ratings in the chart are identied as; 1 for the least angle, 2 for second best and 3 for third rate,
etc. When more than one set conditions produce the same bevel angle they are given the same rating. It is possible to have
four conditions with a “1” rating, one with a “2”, and two with a “3”.
Bevel angle ratings are relative for particular material and thickness, they are not absolute; a “3” on 1 inch (25.4mm) material
may have less bevel than a “1” on 1/4 inch (6.4mm) material.