Hypertherm XPR300, Инструкция по эксплуатации

Страница: 225 / 402

Operation
6
XPR300 Instruction Manual 809480 225
Factors of cut quality
Dross

Dross is more likely to occur on a hot workpiece. The first cut in a series often produces the
least dross. You can expect more dross with more cuts.

Changes in shield flow can dramatically influence dross formation on non-ferrous metals.
* Worn or damaged consumables can produce intermittent dross.
How to get the results you want
This section of the manual gives general recommendations for how to get the best results for many
processes.

For instructions on how to troubleshoot specific performance problems,
see
Diagnostics and Troubleshooting on page 251.
General recommendations for all processes

Always start with the default settings for the process that you want to use. In most cases,
you can expect the best results when you use the default settings that come with a
process ID.

If you decide that it is necessary to adjust a default setting, use offset or override commands
to make incremental changes to the original value (values), within limits. (See
Process ID
offsets / overrides on page 220.)

Do not allow the torch to touch the workpiece during cutting system operation. Contact with
the workpiece can damage the torch nozzle and shield. It can also damage the surface of
the workpiece.

Make sure that the torch is perpendicular (at a 90° angle) to the workpiece for
perpendicular-position processes.

Unsteady drive system and rail movement can make torch motion unsteady, which can
cause irregular cut patterns. Make sure to do routine service and maintenance to the drive
system and rails.

See the instruction manual that came with your cutting machine or table
for information on how to do this.

Do all cutting system maintenance tasks as scheduled. (See Maintenance on page 231.)
Problem Cause* Solution
On mild steel, low-speed dross is
heavier, but easy to remove. The plasma arc can move ahead of the
torch when the torch speed is too slow. Increase the torch speed.
On mild steel, high-speed dross is finer,
but difficult to remove. The plasma arc can lag behind the torch
when the torch speed is too fast. Decrease the torch
speed.