Information on processing dependent peak counts at the same Ra-values ​​using EDT-electrodes of the Udo Plante GmbH.

Electrode types:

• 2CE2150 Copper hollow profile,
• 1GE0100 Plangraph 1 (Graphite full material)
• 2GE0100 Plangraph 2 (Graphite 65%/Copper 35% full material).

A significantly higher number of peaks was reached at Plangraph 1 in the Cap (-) modus at a roughness Ra of 3.02μ with 104/cm. With the hollow copper electrodes there was determined a peak count of only 63/cm at mode Cap (-) and almost the same roughness of 3.06μ Ra. Also with hollow copper electrodes at mode Puls (+) with almost the same roughness of 3,06µ Ra, there was a peak count of 76/cm. Further, the Plangraph 2 electrodes (graphite 65%/35% copper) showed a slight increase in the number of peaks of 120/cm.

Summary:

To what extent this slight increase from 104 to 120 points (increase of about 15%) justifies a much higher price (about 3-times) remains to be discussed. The cost of producing these graphite types is enormous. The graphite block in liquid state is under vacuum immersed into glowing copper (melting point 1.083°C). Thereafter, the liquid copper diffuses under protective gas and pressure in the remaining open pores between the graphite portions. After finishing the diffusion process, the copper-graphite block will be lifted out of the copper bath. After cooling process and appropriate quality control the block is ready for mechanical processing of countless electrodes dimensions.

This information is just for your reference. This data is not transferable to other EDT machines and must be NEWLY determined in each individual case on site.

Information Plangraph_english.pdf