1、脈沖寬度的影響
　　脈沖寬度是加到電極和工件上放電間隙兩端的電壓脈沖的持續時間。石墨脈沖寬度確定單個脈沖的脈沖能量，隨著脈沖寬度增大，工件的蝕出量越多，產生的蝕坑越深越寬，工件表面粗糙度值越大。脈沖寬度越大，電極損耗降低。在電流不變的情況下，再增大脈沖寬度，高純石墨加工速度反而下降。因為脈沖寬度過長，不是正常的放電加工，而是在工件表面燒蝕，加工不穩定。
2、脈沖間隔的影響
　　脈沖(chong)(chong)間(jian)(jian)隔(ge)是兩個(ge)電(dian)壓(ya)脈沖(chong)(chong)之(zhi)(zhi)間(jian)(jian)的(de)間(jian)(jian)隔(ge)時間(jian)(jian)，熱壓(ya)石(shi)墨(mo)改變(bian)(bian)(bian)脈沖(chong)(chong)間(jian)(jian)隔(ge)每次放電(dian)的(de)能量和(he)(he)工(gong)(gong)件(jian)蝕(shi)除量保(bao)持不(bu)變(bian)(bian)(bian)，而改變(bian)(bian)(bian)相(xiang)同時間(jian)(jian)內的(de)放電(dian)次數(shu)脈沖(chong)(chong)間(jian)(jian)隔(ge)影響加(jia)(jia)工(gong)(gong)速度和(he)(he)加(jia)(jia)工(gong)(gong)穩定(ding)性，表面粗糙度幾乎不(bu)變(bian)(bian)(bian)，加(jia)(jia)工(gong)(gong)速度和(he)(he)電(dian)極(ji)(ji)損(sun)耗(hao)發生(sheng)變(bian)(bian)(bian)化(hua)。脈沖(chong)(chong)間(jian)(jian)隔(ge)增(zeng)大，加(jia)(jia)工(gong)(gong)速度減(jian)小，脈沖(chong)(chong)間(jian)(jian)隔(ge)達到某一值時，如果脈沖(chong)(chong)間(jian)(jian)隔(ge)再增(zeng)加(jia)(jia)，電(dian)極(ji)(ji)損(sun)耗(hao)反而會(hui)增(zeng)大，由于脈沖(chong)(chong)間(jian)(jian)隔(ge)增(zeng)加(jia)(jia)，極(ji)(ji)間(jian)(jian)介質的(de)消電(dian)離(li)比較充分，有利于形成覆蓋層，因而電(dian)極(ji)(ji)損(sun)耗(hao)減(jian)小。但脈沖(chong)(chong)間(jian)(jian)隔(ge)過小，回轉(zhuan)窯石(shi)墨(mo)塊電(dian)極(ji)(ji)和(he)(he)工(gong)(gong)件(jian)之(zhi)(zhi)間(jian)(jian)的(de)消電(dian)離(li)不(bu)充分，可能在電(dian)極(ji)(ji)和(he)(he)工(gong)(gong)件(jian)表面產生(sheng)燒(shao)蝕(shi)現象和(he)(he)加(jia)(jia)工(gong)(gong)不(bu)穩定(ding)。