Hurco 425 Mark 2 EDM

Prepared by:

Ryan Smith

Location:

Dow 2079A

Hazards:

The following materials and equipment associated with this procedure present exposure or physical health hazards. Safety precautions are prudent and mandatory.

 

Electrocution Hazard -- The EDM (Electro-Discharge Machining) machine utilizes high current passed through a dielectric fluid to remove
material. Avoid contact with dielectric fluid, electronic circuits, and the electrode during operation.
Chemical Splash -- Dielectric fluid is typically petroleum based. The machine uses pressurized fluid to maintain circulation and hence a splash hazard always exists during operation.
Fire Hazard -- Dielectric fluid is typically petroleum based and hence presents a fire hazard. Keep away from open flame or heat source.

Electrocution Hazard -- The EDM (Electro-Discharge Machining) machine utilizes high current passed through a dielectric fluid to removematerial. Avoid contact with dielectric fluid, electronic circuits, and the electrode during operation.Chemical Splash -- Dielectric fluid is typically petroleum based. The machine uses pressurized fluid to maintain circulation and hence a splash hazard always exists during operation.Fire Hazard -- Dielectric fluid is typically petroleum based and hence presents a fire hazard. Keep away from open flame or heat source.

 



Controls:

Prior to performing this procedure, the following safety equipment must be accessible and ready for use: (e.g. chemical fume hood, biological safety cabinet, laminar flow hood, chemical spill kits)

A Class "D" fire extinguisher for combustible metals must be present when working with these metals.  A ventillation / filtration unit should be used during long-running operations to remove evolved gases.



Protective Equipment:

Prior to performing this procedure, the following personal protective equipment must be obtained and ready for use: (e.g. acid resistant gloves, safety eyewear, lab coat, chemical splash apron)

 

Splash-resistant goggles, long pants and closed toed shoes must be worn at all times.
Wear protective gloves when contacting dielectric fluid and components that have come into contact with fluid.  An apron is suggested.

Splash-resistant goggles, long pants and closed toed shoes must be worn at all times.Wear protective gloves when contacting dielectric fluid and components that have come into contact with fluid.  An apron is suggested.

 



Waste Disposal:

This procedure will result in the follow regulated waste which must be disposed of in compliance with environmental regulations.

Clean up your work area when finished!! Scraps pieces should be removed from the machine. Metal goes in the scrap metal bin.  Do not dispose of dielectric soaked rags/towels in the trash. Arrange for disposal through MSE facilities staff.  Dispose of EDM fluid in accordance with current OSEH guidelines.



Spill:

In the event that a hazardous material spills during this procedure, be prepared to execute the emergency procedure below.

Contact MSE facilities personnel for minor spills. Contach OSEH for large spills of dielectric fluid.


Instructions:


Read and understand the operating manual prior to use of this machine. Know locations and uses for all control buttons and indicator lights. Read MSDS for dielectric fluid. If polarity must be changed, consult manual before any operation is started. Normally wired for "POSITIVE (++)" switch position.

  1. Power up machine by first energizing switch on rear-right control panel and then on rackmount controller.
  2. De-energize all transistors in the "A" bank; verify by using the "VERIFY" button.
  3. Select the appropriate sized collet and electrode and the necessary electrode material for the task at hand.
  4. Clamp component to table and adjust alignment of head using digital readout and positioning knobs.
  5. Indicate-in the location and depth of cut as described in manual.
  6. Raise dielectric chamber and close auxilliary flow valves.
  7. Turn-on dielectric pump.
  8. When chamber is full, slowly open the auxilliary valve if necessary / required.
  9. Select and energize the appropriate number of transistor elements as described in manual. Select operation options as necessary on front control panel. Adjust electrode rotation if needed.
  10. Continue with cutting operation.
  11. When finished, turn off pump and electrode drive motor and then close dielectric auxilliary valves. Raise head of machine. Lower dielectric chamber and let the fluid drain off. De-energize all transistor elements and operation options. Remove component and return electrode to drawer.
  12. Turn off control rack and main power at back of unit. Lock in the "OFF" position.

IN CASE OF EMERGENCY: Depress "EMERGENCY STOP" button of front of control panel. This will remove power from all devices connected to the machine with the exception of the electrode rotating drive motor and the digital readout. Consult MSDS located in 3062 DOW for information on the dielectric fluid.


Equipment:


Last Revision:

Sep 25, 2020