Rosa Surface Grinder Has Linear Motor Drives

NL Machine Tool Consulting has announced that Rosa Ermando has introduced the linear motor drive for the table of its grinding machines, series Steel Linear and R46. The linear motor is said to reach high speeds and accelerations, where during grinding a traverse speed of approximately 65m/min and accelerations of 2G are feasible. This increases the output capacity and/or reduction of machining times. It also generates high forces, where the thrust of the motor easily reaches up to 10,000N.

The linear motor has no mechanical components with power transmission components and avoids many disadvantages such as friction, mechanical backlash, and mechanical resonance due to elasticity. It is also said to be precise as it is controlled by a linear optical scale, which means positioning of table within micron precision is possible. The linear motor drive is claimed to be a flexible solution that allows creep-feed grinding, with slow table motion, interpolation between table and vertical axis, high-speed grinding till 65m/m. The machines are controlled through a Siemens Sinumerik 840 DiE CNC control unit and can be supplied with fourth and fifth axis for complicated components.

Schmitt Offers Surface Roughness Measurement Units

Schmitt Europe has launched the Lasercheck range of surface roughness measurement gauges, designed to perform high-speed, accurate and non-contact measurements on a variety of machined parts. Lasercheck is said to work on any material, including metals, ceramics, glass and rubber, and is suited to ground, sanded, polished, honed, super-finished, fine-tuned, and shot-blasted surface finishes.

The surface roughness measurement gauges are specifically designed for portable or on-line use in production and manufacturing environments. Light scatter detection technology is said to provide superior durability, measurement speed (less than one second) and repeatability without high maintenance and recalibration costs. Operation on the production floor can use Lasercheck to easily and quickly monitor surface finish quality without concern for damaging other fragile measurement equipment or surfaces.

Lasercheck surface roughness measurement heads have no moving parts, are claimed to be virtually indestructible and are ideally suited for high-volume QC work. The principle of operation is simple in that a built-in visible laser diode emits a laser beam from the bottom of the gauge, illuminating the surface beneath it. After striking the surface, the laser light is reflected and scattered back into the Lasercheck detection system. The overall intensity and distribution of the reflected and scattered light is measured, digitised by the Lasercheck controller electronics and the surface roughness (Ra) calculated for the illuminated area.

This Ra value is then displayed on the LCD control unit screen. Measurements can be performed by manual pushbutton operation, or continuous high-speed measurements controlled by Windows software, or fully automated high-speed on-line measurements triggered by external signals and Windows software, displaying real-time Ra values in graphical and numeric format with statistical parameters. Lasercheck has been designed for a nominal height standoff of 2.5cm from the measurement surface, in which any motion or vibration is continuously monitored and corrected for during every measurement cycle to ensure accurate results.

The Lasercheck Micro 8826 head measures 2.5 x 1.9 x 5.1cm with a surface roughness measurement range of 0.025 to 2.0 mm and the Lasercheck Mini 6212 head measures 7.5 x 3.5 x 4.4cm with a surface roughness measurement range of 0.0125 to 2.0mm. Three controllers are available. The automated A Controller is a standalone unit capable of 10 measurements per second, the portable B Controller a handheld unit capable of storing up to 10,000 Ra values and an OEM card C Controller for mounting in the customer's own electronics panel.

BNZ Oil-Water Cooler Has Extended Cooling Surface

The BNZ series oil-water cooler from JBJ Techniques features aluminium fins and a rigid tube stack. The company said advantages include an extended cooling surface, compact design, low pressure loss, integrated test ports, cooling capacity up to 500kW flow rate up to 850l/min.

The standard BNZ series offers four shells with available lengths of up to 2,200mm. Newcool also offers tailor-made solutions to the most arduous applications and according to customer specification. BNZ coolers are suitable for all industrial and marine environments.

Aimtec Offers Surface-Mount Switching Regulator

Aimtec has expanded its family of non-isolated, DC-DC switching regulator series with a surface-mount (SMD) version of the step-down switching regulators. Designed in a compact SMD package (15.24mm x 11.82mm x 7.25mm) to support automated assembly, the AMSRL-78-NZ series is suitable for low-profile circuit implementations such as portable- and standby-power applications. Versatile for a number of industrial applications, the AMSRL-78-NZ series is designed to operate at full output power without heatsinking or forced-air cooling below +71C and with output power derating up to +85C.

With four models featuring adjustable output voltages, ranging from 1.8VDC to 15.5VDC, the AMSRL-78-NZ series produces maximum output currents of 500mA at efficiency rates of up to 96 per cent, with low output ripple and noise (25mV p-p) for noise-sensitive applications. Ultra-wide input ranges (up to 6:1) extend from 4.75VDC to 28VDC and allow the products to be powered from unregulated sources. Other features include continuous short-circuit protection on the output and thermal shutdown for added protection in overheating conditions.

The AMSRL-78-NZ input specifications also feature a remote on/off function, which conforms to TTL logic levels. Priced at USD5.60 (GBP3.40) per 1,000+ pieces, the AMSRL-78-NZ series is made with high-quality, RoHS-compliant materials that undergo rigorous quality control to ensure reliability and performance. Samples are available from stock and can be ordered immediately.

V-Infinity Releases Surface-Mount Regulator

V-Infinity, a division of CUI Europe, has announced the release of the V78XX-500-SMT series, a surface-mount version of its 0.5A V78XX-500 DC switching regulator. The V78XX-500-SMT is said to offer efficiencies of up to 96 per cent and is designed to be a high-performance alternative to linear regulators.

Unlike linear regulators, the V78XX-500-SMT series does not require a heat sink, making it suitable for applications where board space is at a premium and energy efficiency is a concern. The V78XX-500-SMT series measures 15.24mm x 8.50mm x 7mm. A wide input range is available from 4.5 to 28V DC and regulated output voltages of 3.3, 5, 12, and 15V DC are offered.

Output current is 500mA with an operating temperature range of -40 to +71C at 100 per cent load, derating to 60 per cent load at 85C. The converters offer short-circuit protection, thermal shutdown, very low ripple and noise (10mV p-p typical), and an MTBF of two million hours. The V78XX-500-SMT series switching regulators are available now through Digi-Key.