Makino EDGE-2, Руководство по предварительной установке, Страница: 30 / 120

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1.9.1.1 EDM Fire Conditions
The following conditions may result in fire during machining operations
(
Figure 1-1
).
1. Fire hazard caused by spraying dielectric fluid onto workpiece. Work-
piece should be submerged in the dielectric fluid to ensure safe burn-
ing.
2. Fire hazard from machining without enough dielectric fluid covering the
workpiece. Dielectric level must be 50mm above the top of the work-
piece.
3. Fire hazard from machine platen contacting a clamp. Ensure moving
machine members will clear clamps, workpiece, and fixturing.
4. Fire hazard due to arcing between shank and electrode. This is
caused if the electrode becomes loose or is improperly mounted.
5. Fire hazard due to carbon build up is caused by a combination of too
little dielectric fluid covering the part and arcing.
6. Fire hazard can be caused by concave electrode shape (not shown),
as gas can collect in cavity. Ensure a vent hole is drilled at the high
point of the cavity.