![]() ![]() The static fatigue and notch sensitivity of the sheet is better than that of 7A04. ![]() USA membuat logam AMS4928 dan AMS4911 ada stok.ħ075 aluminum plate belongs to Al-Zn-Mg-Cu series super hard aluminum,Alloy 7075 has been used in aircraft manufacturing since the late 1940s.Ultra-high-strength deformed aluminum alloys that are still widely used in the aviation industry.It is characterized by good plasticity after solution treatment, particularly good heat treatment strengthening effect, high strength below 150 ☌, and particularly good low temperature strength poor welding performance Has a tendency to stress corrosion cracking It needs to be used with aluminum cladding or other protective treatment.Dual-stage aging can improve the alloy's resistance to stress corrosion cracking.The plasticity in the annealed and just quenched state is slightly lower than that of 2A12 in the same state. Ti-6Al-4V is a two phase alpha + beta grade of titanium and is the most widely used of all the titanium grades. Its properties are very similar to those of the 300 stainless steel series, especially 316. Generally, it is used in applications up to 400 degrees Celsius. In consequence, its uses are numerous such as for military aircraft or turbines. This grade has an excellent combination of strength, corrosion resistance, weld and fabricability. Among its many advantages, it is heat treatable. It is significantly stronger than commercially pure titanium while having the same stiffness and thermal properties. Grade 5 is used extensively in Aerospace, Medical, Marine, and Chemical Processing. Ini memiliki komposisi kimia 6% aluminium, 4% vanadium, 0.25% (maximum) iron, 0.2% (maximum) oxygen, and the remainder titanium. Since the software only knows about the steps and thinks they correspond one-to-one to a distance change, it tells me that the z-offset is larger that it actually is.Grade 5, also known as Ti6Al4V, Ti-6Al-4V, Ti 6-4 or R56400 adalah paduan titanium yang paling umum digunakan. When the motor has to work against the spring to push the nozzle down, the slight flexibility in the belt means that it has to do more steps to get to the build plate. This is what happened with the calibration. This is not a problem if the load on the belt is constant, but when the load changes, the height will not follow the steps of the motor one-to-one any more. At least the z-axis moves a little bit up and down when pushing or pulling on it. The z-axis belt seems to be slightly flexible. And it is easy to see why that is happening. When calibrating the nozzle height with the spring installed, I got considerably larger values for the z-offset than without it. This is when I noticed that the spring approach might not work after all. Fortunately it stuck on the left side and the print was finished and produced a usable (albeit lightly skewed) spring. This reduced the adhesion and the raft peeled off on the right side of the print. ![]() The z-axis could not reach the position it wanted to and the first layer was extruded at a too high position. I forgot to remove nr 3 before starting the print of nr 4. While printing nr 4, it also became obvious why this parameter had to be tuned: It took me until iteration 4 to get the height just about right. The nozzle could no longer reach the build plate. The first iteration already seemed promising, but it was too high. So I designed a plastic spring in Fusion 360 and got printing: The spring would probably not be able to stop the thing completely before the nozzle touches the build plate if the z-axis fell from the top position, but a decelerated impact would be better than a full speed one. In normal operation, the z-axis would push the spring down to build the first centimetre of the prints. My first idea was to print some sort of spring mechanism that would catch the y-axis when it comes crashing down. Also it is much more fun to design your own solution. I would like to avoid any manual locking or unlocking. When the z-axis is locked, it needs to be released manually when one wants to start a new print. This is done either manually or when the z-axis reaches a certain height. There are already a few designs out there that deal with this problem, but they usually just lock the z-axis completely. ![]()
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