6-40
HySpeed HT2000
Instruction Manual
OPERATION
22
How to Optimize Cut Quality
The following tips and procedures will help produce square, straight, smooth and dross-free cuts
.
Tips for Table and Torch
• Use a square to align the torch at right angles to the workpiece.
• The torch may travel more smoothly if you clean, check and “tune” the rails and drive system on the cutting
table. Unsteady machine motion can cause a regular, wavy pattern on the cut surface.
• The torch must not touch the workpiece during cutting. Contact can damage the shield and nozzle, and
affect the cut surface.
Plasma Set-Up Tips
Follow carefully each step in the
Daily Start-Up
procedure described earlier in this section.
Purge the gas lines before cutting.
Maximize the Life of Consumable Parts
Hypertherm’s LongLife
®
process automatically “ramps up” the gas and current flows at the start and ramps them
down at the end of each cut, to minimize erosion of the electrode’s center surface. The LongLife process also
requires that cuts start and stop on the workpiece.
• The torch should never fire into the air.
– Starting the cut at the edge of the workpiece is acceptable, as long as the arc is not fired in the air.
– To start with a pierce, use a pierce height that is 1.5 to 2 times the torch-to-work distance. See Cut Charts.
• Each cut should end with the arc still attached to the workpiece, to avoid arc blow-outs (ramp-down errors).
– When cutting drop parts (small parts that drop down after being cut from the workpiece), check that the
arc stays attached to the edge of the workpiece, for proper ramp-down.
• If arc blow-outs occur, try one or more of the following:
– Reduce the cutting speed during the final part of the cut.
– Stop the arc before the part is completely cut, to allow completion of the cut during the ramp-down.
– Program the path of the torch into the scrap area for ramp-down.
Note: Use a “chain cut” if possible, so the path of the torch can lead directly from one cut part into
the next, without stopping and starting the arc. However, do not allow the path to lead off
the workpiece and back on, and remember that a chain cut of long duration will cause
electrode wear.
Note: It may be difficult to achieve the full benefits of the LongLife process in some conditions.
Summary of Contents for HT2000
Page 1: ...200 Volt Plasma Arc Cutting System Instruction Manual 802460 Revision 14 HySpeed HT2000 ...
Page 9: ......
Page 95: ...POST INSTALLATION 5 8 HySpeed HT2000 Instruction Manual 19 ...
Page 175: ...MAINTENANCE 8 30 HySpeed HT2000 Instruction Manual 22 ...
Page 235: ......
Page 236: ......
Page 237: ......
Page 238: ......
Page 239: ......
Page 240: ......
Page 241: ......
Page 242: ......
Page 243: ......
Page 244: ......
Page 245: ......
Page 246: ......
Page 247: ......
Page 248: ......
Page 249: ......
Page 250: ......
Page 251: ......
Page 252: ......
Page 253: ......
Page 254: ......
Page 255: ......
Page 257: ......
Page 259: ......
Page 261: ......
Page 262: ...Coolant Flow Diagram ...
Page 263: ......
Page 265: ...APPENDIX A a 2 HySpeed HT2000 Instruction Manual 20 ...
Page 267: ...b 2 HySpeed HT2000 Instruction Manual 19 ...
Page 268: ...HySpeed HT2000 Instruction Manual b 3 19 ...
Page 269: ...b 4 HySpeed HT2000 Instruction Manual 19 ...
Page 270: ...HySpeed HT2000 Instruction Manual b 5 19 ...
Page 272: ...HySpeed HT2000 Instruction Manual b 7 19 ...
Page 273: ...b 8 HySpeed HT2000 Instruction Manual 19 ...
Page 274: ...HySpeed HT2000 Instruction Manual b 9 19 ...
Page 275: ...b 10 HySpeed HT2000 Instruction Manual 19 ...
Page 279: ...APPENDIX D d 2 HySpeed HT2000 Instruction Manual 19 ...
Page 285: ...APPENDIX E e 6 HySpeed HT2000 Instruction Manual 19 ...