What are the types of CMM?

What are the types of CMM? There are four main types of coordinate measuring machine (CMMs): bridge, cantilever, gantry and horizontal arm. The one you choose will be determined by what you wish to use it for. All CMMs have three orthogonal axes, X, Y and Z which operate in a 3D coordinate system. Which […]

Why does my quad not start?

Why does my quad not start? There are two main reasons why an ATV will not start. One is the unit does not have spark and without spark the engine will not fire. Also, if the engine has poor gas flow your ATV will not run. Below are simple steps on how to check to […]

Do safety glasses expire?

Do safety glasses expire? Most goggles and safety glasses can technically last up to 3 years, but there is a grey area between when something is usable and when safety has been compromised. How long should a pair of safety glasses last? one to three years What is the standard for safety glasses? ANSI Z87.1 […]

What is hydrodynamic and thermal boundary layer?

What is hydrodynamic and thermal boundary layer? This thin layer of changing velocity has been called the hydrodynamic boundary layer; a concept first suggested by Ludwig Prandtl in the year 1904. Heat transfer occurs due to heat conduction and energy transport by moving fluid within this thin layer. What is the difference between hydrodynamic and […]

What causes crater wear?

What causes crater wear? Crater wear happens on the tool face at a short distance from cutting edge by the action of chip flow over the face at very high temperature. The crater wear is mainly due to diffusion and abrasion. They are commonly observed where the continuous chip is formed (usually in the ductile […]

What are the types of negative feedback?

What are the types of negative feedback? Negative Voltage Feedback Voltage-series feedback. Voltage-shunt feedback. How many types of negative feedback topologies are there? Negative feedback can be achieved via four different forms. They differ in how the input and output impedances are changed….3.4: The Four Variants of Negative Feedback. Type (in-out) Series-Series Zin High Zout […]

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