Blogs
Tolerance and Measurement Accuracy
Tolerance Tolerance refers to the total allowable error within an item and is specifically represented with the symbol +/-. During the manufacturing process it’s almost inevitable that items on the line can become damaged at one point or another. Products can face damage in multiple ways. For instance, changes in temperature and humidity can cause a product to become warped and disfigured. Warping can also occur if there’s improper feedback from the process control device. No matter the reason, it has become necessary to take any and all errors into consideration during the manufacturing and inspection processes. When used [...]
Measurement Errors
Measurement Errors At some point in the manufacturing process you’ll find that differences in measurement results (measured values) will begin to show up due to one error or another. A variety of issues can contribute to a measurement error. As a result you need to have countermeasures in place so that you’re prepared. If you encounter a measurement error, it’s vital that you examine the cause of the error very carefully before using a countermeasure. Keep this in mind if you wish to maintain the quality of your product. Types of Errors in a Measurement System Gross Errors – [...]
What is Measurement?
Measurement is about determining the quantifiable attributes of a target object. Examples of these attributes include: length weight distance thickness position capacity size The following sections explain more about what measurement is – and isn’t. Why is measurement misunderstood? Sometimes, people use the term “measure” instead of “calculate” or “quantify”. All these terms are related, but they’re not the same. For clarity’s sake, think of measurement as a single action that you perform with instrumentation. Collectively, “instrumentation” describes devices (i.e., instruments) that measure, indicate, and sometimes record values. Today, there are many different types of specialized measuring instruments. Bakers [...]
What is a displacement sensor?
What are Displacement Sensors (Displacement Gauges) and Dimension Measurement Systems? What is a displacement sensor? A displacement sensor (displacement gauge) is primarily used to measure the range of where an object has to travel and in relation to a reference position. Displacement sensors have multiple uses. Its primary use is for dimension measurement to figure out an object’s width, height, and thickness. Accuracy, application and usage environment is required when selecting the best equipment. What is a measurement sensor? A measurement sensor is a device that is used to measure an object to ascertain its dimensions such as by [...]
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Displacement Measurement
Types of Displacement Measurement Run-Out/Vibration There are many ways to measure run-out/vibration including the type of measurement system, run-out or vibration (direction), and environment where the system is being installed. Choosing the wrong kind of equipment can lead to drastic consequences. You can run into issues such as increased man-hours during production and issues with insufficient precision. Example Applications Run-out measurement of HDD surface Laser displacement sensors are very helpful in measuring the oscillation at a single point on a specific target’s exterior. The further away that vibration amplitude is from the center of rotation from a target, [...]
Measurement List
Measurement List Displacement sensors/measurement systems make many different types of measurements possible. Typically the application environment and the measurement target determines the type of measurement method that should be used for optimum results. There are several types of measurement systems that you should become familiar with: Dimension Measurement Thickness Width Height/Step Outer Diameter Angle Radius / Inner Diameter Displacement Measurement Run-out/Vibration Eccentricity Stroke Positioning Edge Position Gap/Clearance Profile Measurement Warpage and Flatness 2D Shape 3D Shape Thickness For those searching for Thickness Measurement Systems If you’re searching for the best method of measuring thickness, the process may not be [...]
Inline Offline Measurement
Inline/Offline Measurement Inline and offline measurements refer to two different types of measurements. Inline Measurements are commonly referred to as automatic measurements made during a process . Offline measurements, on the other hand, are often referred to as manual measurements. The difference between the two occurs during the measurement process (line). If the measurements are included in the line then the process is considered “inline”. If it’s separate from the line then it’s considered “offline”. For off line measurements products are removed from production , inspected and returned to production ,discarded or saved as inspection samples Inline Measurement An [...]