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 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 gap?
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 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 raster angle?
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 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 PEEK filament?
PEEK is a semicrystalline thermoplastic with excellent mechanical and chemical resistance properties that are retained to high temperatures. PEEK is regarded as one of the highest performing engineering thermoplastics in the world together with other polymers of the PAEK family such as PEKK.
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.
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.
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.
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 the best orientation for 3D printing?
Orientation A is the most ideal orientation in regards to minimizing support material and also achieves the best surface finish. Layer height is less important in this orientation as most curves and angles will be printed in the X and Y axis.
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 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.
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 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.
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.
