Maintenance
OMAX JetMachining® Center Operator’s Guide
400433D-EN
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• Consider using a diamond orifice assembly if orifice chipping is a chronic problem not overcome by
using filters or by following proper procedures.
• Depending on your application, and if speed and longer life are the primary concern, use a 0.042"
mixing tube instead of the standard 0.030" mixing tube. Be aware that parts will have slightly more
taper and a wider kerf.
• If unusual cutting conditions are permitting dirty water to enter the nozzle vent hole, route a piece of
tubing from the vent hole to the top of the Z-axis.
• Use only high-quality abrasive as it contains less dust and a more uniform particle size.
• Use a nozzle guard assembly to help protect the mixing tube from damage during cutting.
To reduce nozzle maintenance downtime:
• Have a spare nozzle body built and ready to replace on the machine when needed.
• Have new consumable parts on hand and replace them when rebuilding the nozzle. Once the nozzle
is installed and running, determine which parts can be reused as spares in the future.
Some machine practices that will also extend the life of the nozzle and its components are as follows:
• Use a nozzle muff and, whenever possible, cut underwater to reduce splash-back. The splash-back
contains water, garnet, and eroded material from the tank. If these solids enter the vent under the
orifice it can cause premature wear to the mixing chamber, allowing garnet to get on top of the orifice
and chipping it. Figure 4-38 provides an example of the damage caused to a Tilt-A-Jet assembly
when the machine cut without a muff. This is preventable damage that will affect your warranty.
Figure 4-38: Abrasive Damage from Not Using a Nozzle Muff
• After servicing the pump, nozzle, or replacing a piece of hard-plumbing, always flush the system by
performing a “water only” test for several minutes with both the orifice and last chance filter
removed.
• Rotate the Mixing Tube 90 degrees following every eight hours of cutting. This distributes wear more
evenly around the internal diameter of the Mixing Tube if the orifice is chipped or misaligned.
Summary of Contents for JetMachining Center 2626
Page 8: ...OMAX JetMachining Center Operator s Guide viii 400433D EN ...
Page 12: ...OMAX JetMachining Center Operator s Guide xii 400433D EN ...
Page 22: ...OMAX JetMachining Center Operator s Guide Safety First 1 10 400433D EN ...
Page 140: ...OMAX JetMachining Center Operator s Guide OMAX Glossary 6 16 400433D EN ...
Page 144: ...OMAX JetMachining Center Operator s Guide Index 4 400433D EN ...