Makino EDGE-2, Preinstallation Manual, Page: 28 / 120

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1.9 EDGE2 Ram Electrical Discharge Machine Safety
In addition to safety precautions for all machining operations, Become
familiar with the machine specific safety features listed below.
1.9.1 Fire Hazard and Prevention
All Makino RAM machines are provided with the following fire related
safety features:
1. Dielectric Temperature Detector – to immediately stops the machining
process when the temperature of the dielectric fluid rises above a set
value of 53°C.
2. Dielectric Level Detector – to immediately stops the machining pro-
cess when the dielectric level falls below the set level. The set level
must be at least 50mm above the workpiece.
3. Abnormal Machining Detector – stops the machining process if an arc
occurs for an extended duration. During an arc the head retracts to
clear the problem. If the head retracts beyond a specified distance,
machining stops and an “abnormal machining” alarm is generated.
4. Automatic Fire Extinguisher – If the dielectric fluid catches fire a sen-
sor detects the temperature rise and discharges the extinguishing
agent into the work area. Additionally, all machine functions stop and
an audible alarm sounds. To resume machining operations, you must
change filters and dielectric fluid to remove the extinguishing agent. Do
NOT remove or change the positions of the fire extinguisher sensor(s)
or jet nozzle(s).
Fire Hazard
RAM type EDM uses a dielectric fluid in the machining process. This fluid is flammable
and may ignite, if improperly applied.