Question

sls: new developments
use the information below to answer the question.
there are three new developments in sls printing related to its price, sizing, and technology.

price
popular machines cost $18,000 to $32,000. a do-it-yourself desktop model is now available for $6,000.

size
the build volume is becoming smaller. the powder bin for a full-size industrial printer is 300 x 300 x 300 millimeters. with many of the new desktop models, the build volume is about a third of that size: 100-150 millimeters per side.

technology: heat source
with larger sls printers, a co₂ laser provides the heat for sintering the powder together. the smaller models use an optic fiber system, which is not as hot. there are also some printers that use a co laser rather than a co₂ laser. this increases the heat of the beam and creates more detailed parts. this is a good option for highly specialized projects that require high accuracy and very fine detail.

to increase the heat of the beam and create more detailed parts, what do some sls printers use?

an no3 laser

a co laser

an lr laser

a na2 laser

Explanation:

To answer the question, we refer to the "Technology: Heat Source" section of the provided information. It states that "There are also some printers that use a CO laser rather than a CO₂ laser. This increases the heat of the beam and creates more detailed parts." So we match this information with the given options.

Answer:

a CO laser