![]() ![]() SE8913 Small Payload Series SE8913 devices use a dual-axis center of gravity instrument for high accuracy measurement of the CG location of objects weighing up to 33 pounds. The SE90168 Series of weight and CG instruments is designed for the rapid measurement of weight and CG with the level of accuracy associated with a high-volume production environment.įour standard models deliver medium accuracy and convenience. SE90168 instruments can take a dual-axis measurement once an object is positioned onto the square or triangular plate. Similar to the WCG Series, SE90168 instruments can measure a third CG coordinate. Automated operation software makes CG measurement a seamless process. SE90168 Production Series Models offer rapid measurements of items under 300 lbs. Weight and CG can be measured simultaneously using one of our SE90168 Series instruments. We recommend them for laboratories that don't require the highest precision. The five standard C series models are a lower-cost alternative and suitable for general purpose applications. ![]() This type of instrument is often used to measure "black boxes" used in aircraft and missiles. ![]() Less than one minute is required to make a measurement, so these instruments are ideally suited to high volume production. CG accuracy depends on test object weight, center of gravity height, fixture accuracy and leveling. The third CG coordinate can be measured after rolling an object 90 degrees. Our CG Measurement Instrument Models Include: WCG High-Accuracy Series Our WCG line tests items up to 2,850 lbs, with ultra-high sensitivity models available. These instruments use a load cell system to measure the location of center of gravity using a weighted average. To measure an object, simply lower it onto the triangular table and position it relative to machine zero. Several of these include weight measurement as well. We offer many types of instruments to measure / test center of gravity (also referred to as center of mass). For example, they help pinpoint the flight characteristics of an object and align thrusters for straight travel. While center of gravity measurement can be complex and demanding, we manufacture state-of-the-art devices to simplify the process and deliver exceptional accuracy. It's a crucial mass property in the fields of aerospace, defense, automotive and related industries for the performance and safety of products.Ĭenter of gravity measurement tools are useful in a variety of applications. The use of symmetry would tell you that the center of mass is at the geometric center of the rod without calculation.Weight and Center of Gravity (cog, cg, cm) Measurement Equipment The center of gravity (CG) location averages all the weight of an object and identifies a balance point. Exploiting symmetry can give much information: e.g., the center of mass will be on any rotational symmetry axis. Such integrals are typically transformed into spatial integrals by relating the mass to a distance, as with the linear density M/L of the rod. Continuous mass distributions require calculus methods involving an integral over the mass of the object. This example of a uniform rod previews some common features about the process of finding the center of mass of a continuous body. It also points the way toward the calculation of the center of mass of an extended object.įor a continuous distribution of mass, the expression for the center of mass of a collection of particles:īecomes an infinite sum and is expressed in the form of an integralįor the case of a uniform rod this becomes This approach applies to discrete masses even if they are not point masses if the position x i is taken to be the position of the center of mass of the i th mass. For two masses this distance is calculated fromįor the more general collection of N particles this becomes The center of mass is the point at which all the mass can be considered to be "concentrated" for the purpose of calculating the "first moment", i.e., mass times distance. ![]() HyperPhysics***** Mechanics ***** Rotation The center of mass lies on the line connecting the two masses.ĭetermining center of mass of extended object If you are making measurements from the center of mass point for a two-mass system then the center of mass condition can be expressed as where r 1 and r 2 locate the masses. In one plane, that is like the balancing of a seesaw about a pivot point with respect to the torques produced. The concept of the center of mass is that of an average of the masses factored by their distances from a reference point. The terms "center of mass" and "center of gravity" are used synonymously in a uniform gravity field to represent the unique point in an object or system which can be used to describe the system's response to external forces and torques. ![]()
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