OMAX JetMachining® Center Operator’s Guide
Maintenance
4 - 54
400433D-EN
Miscellaneous
The mixing tube is worn and
unable to form a perfect jet stream
Mixing tube wear occurs first at the inlet, then a conical wear zone
grows toward the exit end of the mixing tube. Check the tube bore
at both ends using a drill or gage pin. When the outlet has
increased in diameter by 0.005" (0.13 mm), the mixing tube is near
the end of its useful life for precise cutting.
Abrasive Has Stopped Flowing
Condition and Possible Causes
Corrective Action
The abrasive flow is stopped or
has been reduced by the presence
of dirt or wet abrasive.
Disassemble the plugged items, blowing them clean and dry with
an air hose.
WARNING!
Never point the air stream at anyone during the
cleaning process. Always wear eye protection!
The standoff distance is so narrow
that the nozzle is plugged by the
work piece before it starts cutting
and water is forced up the
abrasive tube.
Increase the standoff between 0.040" (1.0 mm) and 0.050"
(1.3 mm).
Note:
With a motorized Z-axis, in Make, under Motion
Preferences, it is possible to set a pierce height that is
different from the cutting height. To help reduce nozzle
plugging, consider setting the pierce height higher than
the cutting height.
The shop air pressure is
insufficient to open the abrasive
valve.
The abrasive valve requires 60 to 120 psi (4 to 8 bar) shop air.
Abrasive Pours Out the Top of the Abrasive Tube
Condition and Possible Causes
Corrective Action
The abrasive flow is stopped or
has been reduced by the presence
of dirt or wet abrasive.
Disassemble the plugged items, blowing them clean and dry with
an air hose.
WARNING!
Never point the air stream at anyone during the
cleaning process. Always wear eye protection!
The jewel orifice is plugged by
foreign material in the water line.
Remove the nozzle and flush the lines. Replace the jewel with a
new one.
The standoff distance is so narrow
that the nozzle is plugged by the
work piece before it starts cutting
and water is forced up the
abrasive tube.
Increase the standoff to between 0.040" (1.0 mm) and 0.050"
(1.3 mm).
Water Spurts Out of the tank
Condition and Possible Causes
Corrective Action
The part is positioned on top of a
slat, causing the jet stream to
reflect upwards.
Contain the spray with a muff around the nozzle. A disc cut from a
2" (5 cm) thick sponge makes an effective muff.
The abrasivejet is not piercing the
material.
See the earlier item,
Abrasivejet not piercing material,
under
“Machining Quality.”
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 ...