Production Machining

FEB 2013

Production Machining - Your access to the precision machining industrial buyer.

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PRODUCTS 500°F Cleanroom Oven Dries Precision Parts No. 922 is an electrically heated 500°F (~260°C) cleanroom cabinet oven from Grieve, currently used for drying precision parts in baskets at the customer's facility. 30KW are installed in Incoloy sheathed tubular heating elements to heat the load. Workspace dimensions are 36" wide × 36" deep × 51" high. The unit has 4" insulated walls, aluminized steel exterior, type 304, 2B finish stainless steel interior with continuously backwelded seams, while the exterior is finished in white epoxy paint with a #4 brushed finish stainless steel door cover and control panel face. The oven is also equipped with double doors and positive latching door hardware. A 1,500 cfm, 2-hp recirculating blower provides horizontal airflow to the oven and two 30" × 24" × 6" thick stainless steel high temperature HEPA recirculating filters further purify the air. The ductwork is easily removable to expose filters for inspection or replacement. Controls onboard No. 922 include a digital indicating temperature controller, manual :: Grieve Corporation reset excess temperature controller with separate contactors, recirculating blower airflow 847-546-8225 safety switch and solid state contactors. grievecorp.com Monitoring System Offers Electronic Analog Sensor The OTT/JAKOB analog position monitoring system with the existing peak values. The position controller and a digital readout electronic analog sensor allows the user to monitor the drawbar also displays operating hours and operating cycles. for performance and wear. An electronic analog sensor detects :: Advanced Machine & Engineering Co. the position, and an electronic unit attached to the CNC machine 800-225-4263 controller transmits the data. This system indicates whether or not ame.com the tools are clamped, unclamped or present. It can increase tool head accuracy and longevity by monitoring cycles and hours, indicating whether or not tools are properly held. Because these units transmit information quickly to the controls, mechanical signal rings with proximity sensors are now obsolete. Negative influences of the mechanical signal rings at higher rpm can therefore be avoided. Components of the monitoring system include the cylindrical analog sensor consisting of a primary and secondary coil. During clamping or unclamping, as the drawbar connection moves axially through the analog sensor, the target ring on the drawbar connection triggers the output signal. The signal increases further, as the target ring enters the sensor, indicating the position. The position is also monitored during the machining process. Analog sensor electronics supply the primary coil with constant frequency and amplitude. A demodulator transforms the signal of the secondary coil into a stable DC output signal. The position controller evaluates the current signal and sets the output signals at the adjustable limits. A digital filter compensates 62 PRODUCTION MACHINING :: FEBRUARY 2013

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