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MIG welding (that stands for metallic inert gasoline) is completed by feeding a wire via the contact tip of a welding gun. A shield of gasoline, also delivered via the tip, surrounds the contact space — defending the electrode wire and retaining any contamination out of the weld so it seems nicer. The feeding wire is melted when it’s energized with electricity and varieties the weld puddle.

(From: Mark Folsom (folsomman@redshift.com).) I constructed somewhat ruby laser with a pair of straight xenon pump lamps. I found that I needed a really large amount of pump power to get to threshold. We might get massive pulses out of Nd:YAG or Nd:Glass with a pair of capacitors smaller than my thumb, however the ruby required caps the size of beer cans. Low Chromium ion concentrations make for decrease thresholds. I would also caution you that the lamp ought to be near the rod or else the cavity should have extremely reflective ends. Elliptical reflectors have very completely different magnification near aspect versus far side, so focusing extended objects gives very completely different outcomes than you would suspect by ray tracing a line source. Using a small eccentricity in your ellipse may also help minimize this impact. We always bought better outcomes with close-coupling in a cylindrical-section cavity than in an elliptical cavity. Pulsed Ruby Laser Questions and Feedback

Using laser concentrating on devices on defensive handguns or tactical rifles is a proven methodology of augmenting traditional sights, both optical or iron. Lasers supply a quantity of advantages over conventional sights. A laser-equipped firearm can be aimed from awkward positions, reminiscent of lying in bed or from behind cowl. Second, lasers are easy to see in darkness or in low mild, unlike iron sights. Lasers also might function a deterrent to potential threats. Prison guards and police officers can recite countless instances of aggressive assailants instantly turning into born-once more pacifists when they see cheap laser modules dots dancing on their chests. They provide neophyte gun homeowners who’ve little or no formal coaching with an instantaneous means to aim. Aligning iron sights correctly takes follow, but pointing a laser is intuitive.

3D Systems, primarily based in Rock Hill, South Carolina, has pioneered and used a wide range of 3-D printing approaches since its founding in 1986. It has even trademarked a few of its technologies, such because the stereolithography apparatus (SLA) and selective laser sintering (SLS), every described later in this text. While MIT and 3D Methods remain leaders in the sphere of 3-D printing, other firms have additionally brought modern new products to the skilled market, constructing on these AM technologies.

In the 2000s, the Piedmont Triad Center for Advanced Manufacturing (PTCAM) was a partnership of colleges and companies that provided palms-on training in metalworking expertise in North Carolina. A few of PT CAM’s coaching included a stereolithography apparatus (SLA) by 3D Systems. SLA makes use of photopolymerization, directing a laser throughout a vat of liquid plastic called photopolymer. As with inkjet 3-D printing, the SLA repeats this course of layer by layer until the print is completed.