• HEGNER High-Performance Precision Scroll Saws – Advanced ...

Splitters may incorporate pawls, a mechanism with teeth designed to bite into wood and preventing kickback. Splitters can take many forms, including being part of the blade guard that comes standard with the saw. Another type of splitter is simply a vertical pin or fin attached to an insert. Splitters are available commercially or can be made from wood, metal or plastic.

Anti-kickback pawls: Most modern table saws are fitted with kickback pawls, a set of small spring-loaded metal teeth on a free-swinging pawl ( usually attached to the guard) which help to put a strong downward force on a board. This can help to immobilize the board in the event of a kickback. However, these have sometimes been found to be somewhat ineffective when compared to a splitter.Text is available under the Creative

Commons Attribution-ShareAlike License; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization.A measuring instrument is a device for measuring a physical quantity. In the physical sciences, quality assurance, and engineering, measurement is the activity of obtaining and comparing physical quantities of real-world objects and events.

 Established standard objects and events are used as units, and the process of measurement gives a number relating the item under study and the referenced unit of measurement. Measuring instruments, and formal test methods which define the instrument's use, are the means by which these relations of numbers are obtained. All measuring instruments are subject to varying degrees of instrument error and measurement uncertainty.Scientists, engineers and other humans use a vast range of instruments to perform their measurements.

These instruments may range from simple objects Hegner Scroll Saw such as rulers and stopwatches to electron microscopes and particle accelerators. Virtual instrumentation is widely used in the development of modern measuring instruments.Considerations related to electric charge dominate electricity and electronics. Electrical charges interact via a field. That field is called electric if the charge doesn't move. If the charge moves, thus realizing an electric current,

especially in an electrically neutral conductor, that field is called magnetic. Electricity can be given a quality — a potential. And electricity has a substance-like property, the electric charge. Energy (or power) in elementary electrodynamics is calculated by multiplying the potential by the amount of charge (or current) found at that potential: potential times charge (or current). (See Classical electromagnetism and its Covariant formulation of classical electromagnetism A physical quantity introduced in chemistry; usually determined indirectly.