1.1：The installation of EDM Electrode :

①The EDM electrode holder should be cleaned and assembled the centering plate , the clamp head and the electrode. Then, after setting the torque bar to 80 lbs, tighten the 4 foot screws.

②After cleaning the platform, place the  EDM electrode on the platform and check if the 4 feet are close to the platform surface.

Test  the 4 foot screws if it is the same horizontal.

The electrode has been inspected, and the 4 feet are placed on the rubber sleeve (Fig. 6) before being sent to the next processing department.

1.2：the usage of CNC group﹑ EDM group:

① test electrode holder :

After receiving the electrode holder, the operator should take off the rubber sleeve of the foot and check whether the four screws are twisted tightly.

②Mounting spigot: After checking the EDM electrode holder , the spigot can be locked.

Clean the bonding surface between the chucking spigot and the centering plate

Align the position of the centering plate with the spigot and check that the position of the spigot  matches the position of the tube on the centering plate.

Lock the spigot tightly

③mount on the chuck:

• Use a rod to tighten the chucking spigot on chuck and check that the four feet of the clamp head are close to the plane of the chuck. After the electrode holder is installed, it can be processed.
• ④Check if the processed electrode is centered and level:A.Remove the electrode holder from the machine and place it on the chuck  of the marble table carefully。B.After installation, check the center and level of the electrode with the calibration meter on the marble table.。
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• When the electrode holder needs to be rotated during the inspection, the electrode holder must be raised so that the four feet can be rotated , so as to prevent the four feet from hitting the chucks’ jaw。
• After the inspection is completed, the 4 feet of the electrode holder are put on the rubber sleeve before being sent to the next processing department.
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• 1.3：EDM group﹑Wire EDM group:①After the polished electrode is sent to the EDM/wire EDM group, the operator cleans the electrode first, then removes the rubber sleeve and checks whether the screw is tight by hand.②After inspection, the electrode holder can be mounted on the  chuck of the machine for EDM die sinking.
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• 1.3：EDM group﹑Wire EDM group:①After the polished electrode is sent to the EDM/wire EDM group, the operator cleans the electrode first, then removes the rubber sleeve and checks whether the screw is tight by hand.②After inspection, the electrode holder can be mounted on the  chuck of the machine for EDM die sinking.。

A good EROWA  EDM electrode holder combination, not only to use advanced machine production, but also skilled workers to assemble. Once the assembly is not good, it will seriously affect the positioning accuracy function of the product, which will lead to a decline in the yield. Therefore, the installation of the EROWA electrode holder assembly is notoriously “troublesome” and requires a lot. But it is also the “trouble” EROWA fixture positioning accuracy is so high!

Firstly, the electrode holder assembly is composed of several parts: a centering plate and an electrode holder. The centering plate  includes an M5 screw, a hexagonal nail, an inside piece, and a outside piece.

• 1. Before installation, the assembler first checks the above parts. The contents of the inspection include whether the parts are damaged or not. The error of each hex nail is not within the required range and the parts are clean and flawless.
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• Check that the parts are correct before starting the installation. The first step of the installation is alignment. Firstly, the outside plate has the HPEDM logo and the direction of the  HPEDM logo marked on the electrode holder; the centering plate has a blistering base, smooth and engraved  was be on outside
• Install the hex nail. First install the M5 screws. Note that the M5 screws and the hexagonal nails are installed in the same direction. Install the mounted M5 screws on the electrode holder.
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• It is not enough to manually install the M5 screw on the electrode holder. Also use the special torque wrench to adjust the position to 5kg (5N).

The M5 screw receives the proximity positioning surface, and then tightens it with a wrench until the wrench vibrates (ie, 5N locking force).

5. Finally,  Adjust the electrode holder . Place the assembly on a flat table and check

that the four hex nails are flat. If unevenness occurs, adjust the balance with a normal wrench and then test on the test instrument. The precision is required to be ±0.002 mm.

For more information, please pay attention to HPEDM company www.cncedmtool.com, we specializes in  CNC EDM wire EDM  tool , most of which  can be compatible with Erowa ITS system chuck ,  system 3R  EDM and  WEDM tooling system.