EuroWire September 2021

Technology News

Eddy current rotary for testing wire and rod Magnetic Analysis Corp (MAC) will be featuring its new Rotomac® 25 RM eddy current rotary on booth D46362 at the FABTECH show in September. The machine is designed for use in slow throughput operations such as cold headers in fastener production, spring makers, and other parts manufacturers.

The Rotomac 25 RM, coupled with MAC’s Minimac® 60/65 eddy current electronics designed for rotary probe operations, provides on-line inspection for longitudinal surface defects in wire and rod. Operating at 1,000 rpm, with air ride probes and a single test channel, it handles wire from 3 to 25mm ( 1 / 8 " to 1") in diameter, typically used for parts forming. Test probe adjustments are easily accessible. Typical throughput speeds are 12 to 40 ft/min. Bushings keep the product centred during the test, and the rotary’s accurate distance compensation – when using an absolute probe – permits testing excessively out-of-round product. The Minimac 50/55 for inspecting wire, rod and tube for short surface and some subsurface defects at speeds up to 4,000 ft/min will also be on display on the MAC booth. This eddy current instrument is used for inspecting welding wire, including flux core wire where it can detect missing flux as well as flaws in the wire itself. Finding weld-line faults in tube and checking continuity in single and multi- conductor insulated wire and cable are other applications. Using an MID option, the Minimac is effective for detecting magnetic inclusions in non-magnetic product. MAC’s MultiMac® eight-channel eddy current instrument is used to detect surface defects and laps in cold drawn wire and high-speed operations. Magnetic Analysis Corp www.mac-ndt.com

▲ Rotomac 25RM for eddy current testing of wire

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September 2021