Schmitt Unveils Fluid Acoustic Emission Sensor

The latest addition to the Schmitt portfolio of AEM (acoustical emission monitoring) sensors is the Fluid Acoustic Emission (AE) sensor. The SBS acoustical emission monitoring system (AEMS) is an established method of monitoring grinding wheel processes with high precision. Also known as 'gap and crash control' or 'gap-crash', AEMS uses acoustic technology to monitor high-frequency signals generated on the grinding machine during key events in the grinding process.

The Fluid AE sensor is suitable for situations where direct acoustic contact is required during the grinding process. For example, where machine design, high-frequency bearing, mechanical or electromagnetic noise, prevents the use of other types of AE sensor. The Fluid AE sensor uses the existing oil or water-based grinding machine coolant with a separate feed from the cutting stream directed at the component or dresser. The noise of the grinding wheel touching the component or diamond is then transmitted back up the coolant stream to the AE sensor and detected by the Schmitt electronics within one millisecond.

User benefits include elimination of the grinding gap time in the grind cycle, notification and prevention of machine crash conditions, automatic quality monitoring of wheel dressing and machine positional control. The AEMS allows rapid, automatic grinding wheel in-feed right up to the point of initial contact with a new part loaded in the machine. The system can automatically detect the initial contact and report this event to the machine control, stopping the wheel in-feed without operator intervention.

Typical cycle time savings of up to 20 per cent have been achieved using this system, said Schmitt. The AEMS can be stand-alone or added to any SBS grinding wheel balancer controller providing two sensor input sockets. A four-channel SBS controller can give up to eight inputs from eight different AE sensors. Data can be downloaded via a 0-10V analogue output to a PC or external datalogger for QA purposes. Schmitt said that its acoustic sensors can be retro fit, are highly resistant to grinding machine coolants and grinding paste and give reaction speeds faster than traditional methods of spindle load or current monitoring.

Comments

Post a Comment

Popular posts from this blog

What is Class I Division 2?

Image
A Class I Division 2 is a location: (1) In which volatile flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors are handled, processed, or used, but in which the liquids, vapors, or gases will normally be confined within closed containers or closed systems from which they can escape only in case of accidental rupture or breakdown of such containers or systems or in case of abnormal operation of equipment, or (2) In which ignitable concentrations of flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors are normally prevented by positive mechanical ventilation, and which might become hazardous through failure or abnormal operation of the ventilating equipment. Class I Division 2 Classification Class I Division 2 refers to the ANSI/ISA 12.12.01 standard. This standard was previously UL1604 until UL recommended the newer ANSI/ISA standard be used and that all hazardous location products be certified under this standa
Read more

FUSE SIZING CONSIDERATIONS FOR HIGHER EFFICIENCY MOTORS

Image
When selecting the proper fuse for short circuit protection in motor starting applications, it is important to not only ensure that the fuse will not nuisance open during motor start up times, but also that the fuse will coordinate as required with overload relays. When sizing fuses between 125% and 150% of the motor nameplate current, several advantages, including ease of coordination with an overload device, a smaller disconnect, and increased short circuit protection from a lower fuse rating, can be achieved. However, if sizing at this level prevents the motor from starting, it may then be necessary to increase the fuse ampere rating and it then becomes important to know the NEC sizing limitations. As of June 1, 2016, the US Department of Energy has mandated that newly manufactured electric motors will need to meet NEMA Premium® efficiency standards. As motor efficiencies increase, motor locked rotor currents can also be expected to increase. In addition to this, with across-the-lin
Read more

7/8 16UN Connectors that Provide 600 Volts and 15 Amps

TURCK announces new A-Size 3 and 4-pin 7/8 16UN powerfast™ connectors that provide up to 600 Volts and 15 Amps of power. These IP67 rated connectors provide a modular wiring system designed to handle high current applications for machine power distribution, while providing resistance to vibration commonly associated with conveyors, motors and material handling applications. The cordsets are available with a tray rated, exposed run PVC flexlife ® cable, with or without STOOW rating, and 14 AWG wires that allow you to replace hard wiring with a robust, quick disconnect system that saves the time and money spent installing a conduit system. The A-Size powerfast line offers male and female, straight connectors, standard and custom lengths, and pigtails or extensions. To make the system complete, fully encapsulated mating receptacles, with 1/2”-14 NPT mounting threads are available.
Read more