2. 3D PRINTING
3D printing or additive
manufacturing is a process
of making three
dimensional solid objects
from a digital file.
The creation of a 3D
printed object is achieved
using additive processes.
An object is created by
laying down successive
layers of material until the
object is created.
3. DIFFERENCE BETWEEN ADDITIVE AND
SUBTRACTIVE MANUFACTURING
3D printing is the opposite of
subtractive manufacturing
which is cutting
out/hollowing out a piece of
metal or plastic with for
instance a milling machine.
3D printing enables you to
produce complex shapes
using less material than
traditional manufacturing
methods.
6. FUSED DEPOSITION MODELING
Fused deposition modeling (FDM) was established in the
late 1980s to produce several series of machines, such as
FDM Titan, FDM Dimension, FDM Vantage, FDM
Maxum, FDM 3000, and FDM Prodigy Plus.
Fused deposition modeling (FDM) is a technology where
the melt extrusion method is used to deposit filaments of
thermal plastics according to a specific pattern.
FDM consists of a print head able to move along X and Y
directions above a build platform. The polymer is extruded
through the heated nozzle and laid down as filaments
according to the CAD design.
7. ADVANTAGES
FDM is simpler and easy
demodulation
Less expensive
FDM system does not need
synchronization but TDM needs
synchronization.
FDM system has high reliability
It is used for analogue signals
In this system due to slow
narrowband fading, only one channel
gets affected
A large number of the signal can be
transmitted simultaneously
8. DISADVANTAGES
FDM system extremely expensive
FDM provides less throughput
FDM has not dynamic coordination
The full bandwidth of the channel
cannot be used on the FDM system
The communication must have very
large bandwidth
A large number of modulator and filter
required
FDM channel can get affected wideband
fading
FDM system needs a carrier wave or
carrier signal but TDM does not need
carrier signal
9. ALGORITHM
3D Modelling
Export in stl (stereolithography) file format
Import stl file in slicing software
Export in g-code file format
Upload to the FDM 3D printer
Obtain result in the form of solid object