Table of Contents
The raster angle refers to the angle between the path of the nozzle and the X-axis of the printing platform during FDM. The raster angles between two adjacent layers differ by 90◦. The raster angle affects the forming accuracy and the mechanical performance of the printed sample.
What is a raster angle?
Raster angle is the direction of raster with respect to the loading direction of stress, as shown in Figure 1. Air gap is the distance between two adjacent deposited filaments in the same layer. The number of contours is the number of filaments initially deposited along the outer edge.
What is raster orientation?
Raster orientation defines the direction of the individual bead paths within a layer. Figure 1. Naming convention for tensile specimens, e.g., XY0 and ZX90. We used the unique build/raster orientations in specimens for tensile strength testing outlined in the ASTM D638 testing standard.
What is raster width?
(D)The raster width or road width which refers to the width of the deposition path related to tip size. It also refers to the tool path width of the raster pattern used to fill interior regions of the part curves as shown in Figure 5. Narrow and wide filling pattern (roads) were considered to be examined.
What is PEI for 3D printing?
PEI (Polyetherimide) is a great building surface for any 3D printer. The amber / yellow colored surface is commonly used to print a whole range of different filament types such as the two most commonly used ones, ABS and PLA. PEI is widely becoming the gold standard build surface because it is so convenient to use.
What is infill density in 3D printing?
The infill density defines the amount of plastic used on the inside of the print. A higher infill density means that there is more plastic on the inside of your print, leading to a stronger object. An infill density around 20% is used for models with a visual purpose, higher densities can be used for end-use parts.
How does part orientation affect a 3D print?
Part orientation affects your 3D prints in many ways including: quality, accuracy, strength, surface finish and manufacturing time. For Fused Deposition Modeling (FDM) and PolyJet technologies in particular, part orientation is very important in the 3D printing process.
Can ULTEM be 3D printed?
Existing certifications: ULTEM™ resin is FST rated and one of the only 3D printing plastics certified for aircraft components. In the aerospace industry, most parts are required to have this rating to ensure the flame, smoke and toxicity (FST) resistance of a material.
What is PEI coating?
PEI (Polyetherimide), also known as Ultem, is a reusable “relatively maintenance free” build surface for both ABS (with a Heated Bed) and PLA (hot or cold) requiring no additional adhesives such as glue or tape. PEI is appealing due to its “no-surface-prep” conditions, which make it convenient to work with.
What is PEI powder coating?
Finely milled PEI powder is used on compression molding, highly reinforced composites, powder coating, 3D printing, and other demanding applications. Although 140 mesh is our most common sieving size, we can produce PEI powder made using other sieves, whether finer or coarser.
Is 100% infill the strongest?
The obvious answer here is that 100% infill will be the strongest infill percentage, but there is more to it. We have to balance out printing time and material with part strength. The average infill density that 3D printer users apply is 20%, also being the default in many slicer programs.
Is higher infill stronger?
The strength of a design is directly related to infill percentage. A part with 50% infill compared to 25% is typically 25% stronger while a shift from 50% to 75% increases part strength by around 10%. Understanding the application of a final printed part allows a designer to specify the optimal infill percentage.
Should I use 100% infill?
This density percentage keeps print time low, conserves material, and provides okay strength. Functional prints need to be strong. Therefore, we recommend using a higher infill: more than 50% (don’t be afraid of going as high as 100%).
What is 3D orientation?
There are a number of ways to represent the orientation of an object in 3-dimensions. One common way is to use Euler angles (like pitch, roll, and yaw). If a 3D object was oriented North and level, the platform matrix would just be the identity matrix.
Is it better to 3D print vertical or horizontal?
3D printers build the print from bottom to the top of the model in layers, typically upside down! When all printing variables are taken into consideration, printing a horizontally positioned model should print faster than a vertically positioned model.
Why print orientation is important in SLA?
Part orientation plays a crucial role on where support is located for SLA/DLP/LCD 3D Printing. By reorienting a part, the amount of support can be drastically reduced and the cross-sectional area of each layer can be minimized.
Is PEI the same as Ultem?
Ultem. Ultem is a family of PEI products developed by Joseph G. Wirth at General Electric in the early 1980s. Since its acquisition of the GE Plastics Division in 2007, Ultem is manufactured by SABIC.
What is Ultem used for?
Ultem® is widely used in electronics because of its good arc resistance and dielectric constant. Other typical applications include analytical instrumentation and structural components that require high strength and rigidity at elevated temperatures.
What temperature does Ultem print at?
350 – 380 Features Temperatures Glass transition temperature 217 °C (423 °F) Nozzle temperature 350 – 380 °C Heated bed 120 – 150 °C.
Is PEI a surfactant?
The results indicate that the phase behaviour of PEI : cationic surfactant mixtures under dilute conditions can be tuned by altering head-group and counterion.
Is PEI conductive?
Conductive for electricity. Flame resistance (94-V-0 flammability rating) Good chemical resistance. Resistance to hot water and steam.
What is PEI DNA?
Polyethylenimine (PEI) is a simple, inexpensive and effective reagent for condensing and linking plasmid DNA to adenovirus for gene delivery.
What is PETG filament?
PETG filament, also known as Polyethylene Terephthalate Glycol, is a co-polyester known for its durability and ease of use. The G in PETG, stands for glycol-modified, which makes the end product clear, having glass-like visual properties.
Can you print abs on PEI?
When printing ABS (depending on type and temperature), small bubbles may form on the printing plate, which usually disappear after cooling. If the ABS part is removed from the still warm plate, it is possible that the PEI coating is detached or even damaged.
