So…I’m trying to summarize for my students the different designs between a powder bed fusion 3D printer and the directed energy deposition printers that use powdered build material. Can you give me a bullet list of the contrasts in relatively simple terms? I don’t expect each bullet point to be particularly short, but try not to let the explanations drag on either. It should be succinct but accessible. 
system
isliye ... main apane chaatro ke liye ek powder bed fusion 3 di printer or nirdeshit urja jamaav printer ke bich vibhinn diginon ko sankshep main prastut karne kii koshish kar rahaa hum jo powder bild saamagree kaa upyog karte hai.kya aap mujhe apekshaakrit saral shabdon main virodhabhaason kii ek bullate suchi de sakate hai?main prayek bullate bindu ko vishesh rup se chota hone kii ummid nahin karata hum, lekin koshish karen ki spashtikaran ko yaa to khinchne na den.yah sankshipt lekin sulabh hona chahie.
user
- powder bed fusion (pibief) mashiinon ko ek dizin ke liye bhi bahut badi maatra main powder bild saamagree kii aavashyaktaa hoti he jo khud ko adhik maatra main nahin letaa he.3 di object ko "bed" naamak ek nirmaan sataha par powder saamagree (aksar dhaatu) kii ek parat ko jamaa karke parat-dar-parat kaa nirmaan kiya jaataa he or iske kuch hisson ko pighalaane yaa paap karne yaa antim item kii thos sanrachana ke saath mail khaane vaala.powder kii ek nai parat tab us par faili hui he, or agle "slis" kii saamagree kaa mulya pichley ek ke sheersh par he.ant main, puure print bed wolum ko powder se bhar diya jayega, jinamein se adhikansh fus nahin hai.
- iske vipareet, nirdeshit urja jamaav (DED) printer fanal powder nalika ke madhyam se unke urja strot (ek lager, electric chaap, yaa electron beam) ke chaaron ore ghudsavaar.urja strot antarnihit sanrachana ke ek chote se hisse ko pighla detaa he or us sthiti main nae powder ko jodta he, ise thodi maatra main bana detaa he.chunki powder keval nirmaan ke bindu main joda jaataa he, yah pibief printer kii tulana main bahut kam powder kaa upyog karata he.
- adhikansh 3 di printer kii tarah, pibief mashine keval top-down print kar sakati hai.haalanki, overhanging bhaagon ko neeche die gaye aniyantrit powder kii pichhali paraton dwaara samarthit kiya ja saktaa he or takneekee rup se mudrit hone ke liye samarthan sanrachanaon kii aavashyaktaa nahin hoti he.kai DED printer bhi samarthan sanrachanaon ke nirmaan ke bina print kar sakate hai, lekin ve aisa konon par print nojal sir ko ghumaakar aisa karte hai jo adhikansh printer praapt nahin kar sakate hai.
- zyaadaatar maamalon main, donon prakaar kii mashiinon ke bild wolum ko oxikaran se pighali hui saamagree ko rokane ke liye akriy gas ke saath baadh kii aavashyaktaa hoti he.kuch deidi printer main kam sakhti hoti he or nojal ke neeche pighale hue khand ke upar akriy gas ko udaane ke saath dur ho sakate hai.electron-beam deidi printer adhik pratibandhaatmak hai, haalanki, or bild wolum ko nikat vaikum main khaali karne kii aavashyaktaa hoti he taaki electron stream powder ke raste main gas anuon ke saath baatcheet na kare.
- deidi printer aamtaur par pibief mashiinon kii tulana main bade print wolum ke saath banaaya ja saktaa he.
- do main se, deidi nai takanic he, isliye kam operataron ke paas in mashiinon main se adhikansh banane ke liye aavashyak kaushal hai.
assistant
<|system|>
</s>
<|user|>
isliye ... main apane chaatro ke liye ek powder bed fusion 3 di printer or nirdeshit urja jamaav printer ke bich vibhinn diginon ko sankshep main prastut karne kii koshish kar rahaa hum jo powder bild saamagree kaa upyog karte hai.kya aap mujhe apekshaakrit saral shabdon main virodhabhaason kii ek bullate suchi de sakate hai?main prayek bullate bindu ko vishesh rup se chota hone kii ummid nahin karata hum, lekin koshish karen ki spashtikaran ko yaa to khinchne na den.yah sankshipt lekin sulabh hona chahie.</s>
<|assistant|>
- powder bed fusion (pibief) mashiinon ko ek dizin ke liye bhi bahut badi maatra main powder bild saamagree kii aavashyaktaa hoti he jo khud ko adhik maatra main nahin letaa he.3 di object ko "bed" naamak ek nirmaan sataha par powder saamagree (aksar dhaatu) kii ek parat ko jamaa karke parat-dar-parat kaa nirmaan kiya jaataa he or iske kuch hisson ko pighalaane yaa paap karne yaa antim item kii thos sanrachana ke saath mail khaane vaala.powder kii ek nai parat tab us par faili hui he, or agle "slis" kii saamagree kaa mulya pichley ek ke sheersh par he.ant main, puure print bed wolum ko powder se bhar diya jayega, jinamein se adhikansh fus nahin hai.
- iske vipareet, nirdeshit urja jamaav (DED) printer fanal powder nalika ke madhyam se unke urja strot (ek lager, electric chaap, yaa electron beam) ke chaaron ore ghudsavaar.urja strot antarnihit sanrachana ke ek chote se hisse ko pighla detaa he or us sthiti main nae powder ko jodta he, ise thodi maatra main bana detaa he.chunki powder keval nirmaan ke bindu main joda jaataa he, yah pibief printer kii tulana main bahut kam powder kaa upyog karata he.
- adhikansh 3 di printer kii tarah, pibief mashine keval top-down print kar sakati hai.haalanki, overhanging bhaagon ko neeche die gaye aniyantrit powder kii pichhali paraton dwaara samarthit kiya ja saktaa he or takneekee rup se mudrit hone ke liye samarthan sanrachanaon kii aavashyaktaa nahin hoti he.kai DED printer bhi samarthan sanrachanaon ke nirmaan ke bina print kar sakate hai, lekin ve aisa konon par print nojal sir ko ghumaakar aisa karte hai jo adhikansh printer praapt nahin kar sakate hai.
- zyaadaatar maamalon main, donon prakaar kii mashiinon ke bild wolum ko oxikaran se pighali hui saamagree ko rokane ke liye akriy gas ke saath baadh kii aavashyaktaa hoti he.kuch deidi printer main kam sakhti hoti he or nojal ke neeche pighale hue khand ke upar akriy gas ko udaane ke saath dur ho sakate hai.electron-beam deidi printer adhik pratibandhaatmak hai, haalanki, or bild wolum ko nikat vaikum main khaali karne kii aavashyaktaa hoti he taaki electron stream powder ke raste main gas anuon ke saath baatcheet na kare.
- deidi printer aamtaur par pibief mashiinon kii tulana main bade print wolum ke saath banaaya ja saktaa he.
- do main se, deidi nai takanic he, isliye kam operataron ke paas in mashiinon main se adhikansh banane ke liye aavashyak kaushal hai.</s>
