▁voltage ▁supply ▁depends ▁on ▁the ▁maximum ▁depth ▁of ▁w eld ▁required . ▁ ▁The ▁high - vol t age ▁equipment ▁must ▁also ▁supply ▁the ▁low ▁voltage , ▁above ▁ 5 ▁V , ▁for ▁the ▁c ath ode ▁he ating , ▁and ▁negative ▁voltage ▁up ▁to ▁about ▁ 1 0 0 0 ▁V ▁for ▁the ▁control ▁electro de . ▁ ▁The ▁electron ▁gun ▁also ▁needs ▁low - vol t age ▁supplies ▁for ▁the ▁correction ▁system , ▁the ▁foc using ▁l ens , ▁and ▁the ▁def lection ▁system . ▁The ▁last ▁mentioned ▁may ▁be ▁very ▁complex ▁if ▁it ▁is ▁to ▁provide ▁computer - control led ▁imag ing , ▁eng ra ving , ▁or ▁similar ▁beam ▁applications . ▁ ▁Complex ▁electron ics ▁may ▁also ▁be ▁needed ▁to ▁control ▁the ▁work pie ce ▁manip ulator . ▁ ▁See ▁also ▁Electron - be am ▁technology ▁ ▁References ▁ ▁External ▁links ▁▁ ▁Schul ze , ▁Klaus - R ainer . ▁" E lect ron ▁Be am ▁Techn ologies ". ▁D VS ▁Media , ▁Düsseldorf , ▁ 2 0 1 2 . ▁ ▁What ▁is ▁Electron ▁Be am ▁W eld ing ? ▁Electron ▁beam ▁w eld ing ▁of ▁thin - w alled ▁parts ▁W eld ability ▁of ▁various ▁materials ▁Le pt ons - Te chn ologies ▁W eld ability ▁of ▁met als ▁ ▁Category : E lect ron ▁be ams ▁in ▁manufact uring ▁Category : W eld ing ▁ ▁de : Sch wei ßen # E le ktr onen stra hl sch wei ßen <0x0A> </s> ▁National ▁Highway ▁ 1