Technology and Scripts

Archive for July, 2009

Kodak leaves style on the road and trying to find the right balance between features and price in its EasyShare Z885. This 8-megapixel camera can be found for around $ 200, and although not the prettiest Kodak on the market that offers some surprisingly robust and objective than the average.

The Z885 is clearly more oriented to the practical-minded fashion. The thick 1.2-inch-thick camera weighs 7.3 ounces heavier with an SD card and two AA batteries installed. Its controls are fairly simple, centering around a mode dial on top of the camera and a large square navigation button on the back. The menu buttons surrounding the navigation button feel a little small, but otherwise the camera interface works well. Blocks Z885, direct design highlights its most important physical attribute: his goal. The camera includes a lens of 36mm to 180mm equivalent 5x optical zoom in a bit more telephoto power for most compact cameras ‘3 lenses. There is no mechanical image stabilization of the EasyShare Z712 IS, but it’s wider to 12x, either.

As part of the Z series of Kodak EasyShare, the Z885 is designed primarily for camera users more experienced than their SnaPSHooT average. In addition to the standard modes of automatic and preset scene is found in all EASYSHARE cameras, the Z885 is a complete program and manual shooting modes. The manual mode allows you to modify each parameter from the opening exhibition at the shutter speed and even manually focus the camera. In such a little cheap shot, the options are welcome. Unfortunately, if you want to adjust the exposure settings, you must adjust them all individually, the camera has no shutter priority modes and openness.

Kodak actually pumps the ISO sensitivity in the Z885. At full resolution the camera can shoot between ISO 80 and ISO 3200 sensitivity, an impressive range. By ratcheting the camera to 2.2 megapixels or lower, the Z885 can achieve ISO 6400 and ISO 8000 sensitivity, the highest settings we’ve seen in a point-and-shoot. Unfortunately, this feature only looks good on paper, and when you take the parameters of super-high ISO, noise involves both the images that you can actually see the grain in the camera’s 2.5-inch screen LCD. You may not use high ISO shooting for something bigger than a postage stamp or a computer icon, and always pushing.

Just as each board type enjoys its own thermal profile in your surface mount oven, each board type also enjoys its own board-wave parameters in your wave machine

The optimal dwell time for that board was found to be 3.6 seconds, in contrast to 2.8 seconds for the first board. As you can see, the “dwell time profiles” of the two boards are different. This process resulted in dramatically lower defect rates for the second board studied (which had also been previously run at 1.0 seconds), although never quite as low as the new baseline which was attained for the first board. This strongly indicates the presence of sources of defects unrelated to dwell time, for example non-optimal immersion depth or design problems.

Immersion Depth
Changing your immersion depth changes your contact length and dwell time. This makes the direct and accurate measurement of immersion depth critical. Your pump speed produces a wave height (although this can diminish as your solder pot empties of solder), but the actual immersion depth of your boards depends on several factors, including solder pot height, how they sit in the fingers, if your fingers are bent, broken or crooked, the angle of your conveyor and whether or not pallets are used.