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LASER CHESS Deflection

With a variety of pieces, each having different advantages, abilities, and weaknesses. You can use the one move you are allowed per turn in Deflection. So you can work to plan yourself closer to victory. At the end of every turn, you must shoot your laser. But be careful not to hit one of your own pieces!

LASER CHESS Deflection

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Most Deflection pieces can move in all directions by one cell and rotate 90 degrees. There are also advanced pieces such as the Disruptor can disable and weaken nearby pieces. Whereas others such as the Splicer, split your laser into two. Likewise, some pieces can have control from both players. Which also provides a new twist in your strategy.There even are portals that you can use to surprise your opponent.

Do you have a child obsessed with chess? Want to bring a new dimension to their game? Or perhaps you want to introduce your kid to chess with a little more pizazz than the usual wooden board and pieces. If so, get your hands on Laser Chess.

The AMB2018-01 tests consist of laser powder bed fusion (LPBF) 3D metal alloy builds of a bridge structure geometry that has 12 legs of varying size, as shown in Figure 1. The primary objectives of AMB2018-01 tests are to investigate residual stress within the structure, the part distortion which occurs after a section of the part is cut via wire electron discharge machining (EDM), and the microstructures that develop in geometrically distinct locations in the part.

The following presents the scan strategy and scan parameters used by the CBM. The scan strategy and parameters are used for builds in each material (IN625 and stainless steel 15-5). The build parameters and scan strategies are replicated as closely as possible by the AMMT. The slight differences between each machine will be described. The scan strategies for both IN625 and 15-5 steel are identical, including the laser power and speed settings. The only differences in the processing conditions are the recoater blade, which will be discussed in Section 2.2.5, and the power distribution function of the two lasers.

Each layer consists of a contour scan followed by an infill scan. Within each layer, the contour and infill of a part is completed before the next part begins. During odd numbered layers the infill pattern consists of horizontal scans (parallel to the X-axis) that are separated by 0.1 mm (hatch spacing). During even numbered layers, the infill pattern consists of vertical scans (parallel to the Y-axis) that are also separated by 0.1 mm. In between each layer, the build platform is lowered by 0.02 mm so that a new layer of virgin powder can be spread across the powder bed. This process is outlined in Figure 4. the odd and even layers are demonstrated in two different MPEG-4 videos. One is a video that illustrates the scan strategy while the other video is a recording made during several layers from inside the build chamber. The following sections provide more detail of each step. The following information for the CBM is obtained by recording the laser-on/off signal at a rate of 200 MHz and comparing the signal with low-speed and high-speed videos of the process.

2.2.1 Contour of the part features: The contour of each feature on the part is scanned first using a programmed laser power of 100 W and a scan speed of 900 mm/s. The number of contour scans and their timing depend on which features are being created. For instance, as the 12 legs and the base of the part are being scanned in layers 1-250 (Z=0.02 mm to Z=5.00 mm), the laser-on times for legs of similar sizes are consistent. However, since the order of the contouring operations and the starting location of each contour varies from layer-to-layer, the time between legs varies slightly depending on where the laser need to travel to next to melt the next line of material. Furthermore, as the overhang structure begins to form from layers 251-350 (Z=5.02 mm to Z=7.00 mm), the perimeter of the legs and base increase, necessitating a greater amount of time to fabricate these 13 features. However, once the overhang features are complete, the individual leg sections merge, and only the bridge is being fabricated in layers 351-600 (Z=7.02 mm to Z=12.00 mm); only a single contour is required that takes less time than the 13 individual contours. This information is shown in Table 1. Other than some variations between layers due to the contour scan sequence, there is no difference between the contour strategies of the even and odd layers.

In between each contour scan the duration of the laser-off time ranges from 0.0155 s to 0.0255 s, depending on where the previous contour concludes and the next one begins. Once the contours of a single part are complete, the duration of the laser-off time is 0.307 s to 0.363 s before the laser turns back on to begin the first infill scan of the same part.

2.2.2 Infill of the odd numbered layers: All odd numbered layers are processed by the laser traveling at a programmed speed of 800 mm/s using a programmed power of 195 W. It rasters in the horizontal (parallel to the X-axis) direction. The first infill scan line begins at the upper left corner of the part and scans to the right (+X). During the fabrication of the legs, the laser scans from one feature to the next along a constant Y coordinate until it reaches the end of the furthest feature to the right, at which point the laser turns off as the scan direction reverses. This process is illustrated in Figure 5. The laser-on time for each feature depends on the width of the feature along the current scan trajectory. The duration that the laser is off between features depends on the length of the previous feature (if the Y coordinate does not change). The laser-off time is presented in Figure 5 and in Table 2, which also reports the laser-on time for each feature.

Figure 5 - Description of the odd layer scan pattern and the laser-off time between each scan line. This is the same for both materials. Note that the number of scan tracks in each figure is not accurate, this figure is only intended to illustrate the laser timing.

2.2.3 Infill of the even numbered layers: All even numbered layers are processed by the laser traveling at a programmed speed of 800 mm/s and using a programmed power of 195 W. It rasters in the vertical (parallel to the Y-axis) direction. The first infill scan line begins at the lower left corner of the part and scans upward (+Y). During these layers, the infill of each feature is completed before the laser begins melting material in the next. The direction of each scan alternates regardless of whether the laser is continuing to scan a single feature or is transitioning between features. The laser-on times and laser-off times are consistent within features (excluding the right edge that forms a point). However, the laser-off duration is longer between features. This information is presented in Figure 6 and Table 3.

Figure 6 - Description of the even layer scan pattern and the laser-off time between each scan line. This is the same for both materials. Note that the number of scan tracks in each figure is not accurate, this figure is only intended to illustrate the laser timing.

2.2.5 Total layer time and recoating: During the fabrication of the legs (Z=0.02 mm to Z=5.00 mm), the average layer time is 52 s. That is, 52 s pass from the time the first contour begins on layer n to the time the first contour begins on layer n+1. Considering it takes on average 26 seconds to complete the layer for all 4 parts, a significant amount of time is spent before the laser begins melting material for the next layer. The recoating time in the CBM is shorter than in the AMMT, so a dwell is imposed in the CBM to make the average layering time approximately equal.Recoating is performed using a solid recoating blade. When processing 15-5 stainless steel, a ceramic recoating blade is used. When processing IN625, the blade is high-strength steel. The recoating blade spreads powder across the powder bed surface at a speed of 80 mm/s.

For these benchmark comparisons, the part distortion is defined by the vertical deflections of all measured ridge edges. Thus, δi = ziafter - zibefore, where δi is the vertical deflection of edge i.

Lightning strikes can cause substantial damage to buildings and critical infrastructure, such as airports. To mitigate this risk, one EU project is attempting to use powerful laser technology to control where lightning strikes. If successful, the resulting laser lightning rod could help save money - and lives.

At the heart of the project is a novel type of laser featuring a powerful beam. This beam will act as a preferential path for the lightning, diverting it away from potential victims. The unique laser will also guide lightning flashes to the ground to discharge the electric charge in the clouds.

Also keep in mind that in the SW universe, weapons called laser cannons are still blasters firing bolts of hot plasma (lasers are used to heat the plasma in the chamber), and can be theoretically deflected by a (large enough) lightsaber.

Lightsabers contain huge amounts of power. (ie cutting through blast doors). I believe that the lightsaber itself is capable of handling anything up to about an AT-AT cannon. The real problem with that is that it would require an immense amount of strength. So, if the force user could either roll an extremely high strength roll (with or without enhance attribute), or roll a very high sense total (to deflect the bolt just right in order to minimize the force required for deflection), I think that they could deflect almost almost all vehicle and starfighter scale weapons.

The research on process parameters has now been developed from single parameter analyses to multi-parameter mixed analyses and the methods have been mainly to conduct experimental research on the process parameter group so as to analyze the microscopic and mechanical properties. Initially, the main research focused on a single parameter. Zheng et al. [14] found that with increasing applied laser power, the defects of the as-built parts were reduced significantly and the parts presented the highest relative density and tensile strength. In addition, Li et al. [15] found that the same energy density at different laser powers led to different phase formations, microstructures, textures, and mechanical properties for the fabricated selective laser melting. Wang et al. [16] indicated that an appropriate scan speed could result in a fine and stable microstructure that demonstrated a high hardness and tensile strength with a low elongation at break. Spierings et al. [17] analyzed the influence of varying laser scan speeds on the static mechanical properties of SLM processes, which increased the laser scan speed whereas the peak grain sizes in the fine-grained regions decreased. They also discussed the evolving microstructure and precipitation of nm-sized Al3Sc particles at different corresponding energy inputs. On the other hand, Lu et al. [18] studied the effect of the island scanning size on the microstructure and residual stress of In718. Jia et al. [19] analyzed the role of the scanning strategy on the residual stress distribution in a Ti-6Al-4V alloy prepared by SLM. Sg et al. [20] researched the influence of several specific scanning strategy parameters and the post Heat Treatment (HT) used upon the microstructure and the hardness of the SLM parts. Similar studies can be found in the literature. Hajnys et al. [21] designed three scanning strategies in simulation and verified these by experiment with samples which were inspired by the Bridge Curvature Method (BCM) shape. However, the conclusions of scanning trajectory research seem to be not so uniform. 041b061a72


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