Germanjet news, technical articles and resources
The in-cylinder rod sits in oil for years. No wear parts, but the magnet traps debris and particles scour the tube. Flush first, then manage filters.
Before cutting the piston rod: bore over 12.7 mm, depth past full stroke plus dead zone, concentricity held. This hole cannot be reworked once cut.
Jumping magnetostrictive sensor is the commonest complaint; classify first. At rest? Electric fault. Moving? The magnet. Lost frames? The bus.
Shield earthing trips up more sensors than any habit. Analogue loops earth one end at the cabinet; fieldbus shields earth both ends only with bonding.
Add a sensor gateway only when no port matches. It stacks three cycles, adds a fault point and breaks diagnostics; EtherCAT clocks cannot cross it.
Intermittent bus errors are physical-layer, not protocol. Fix it: terminators and linear topology first, then earthing, then routing near welders.
Which fieldbus fits your sensor? Look in the PLC list: CPU port, addable modules, existing backbone. This locks PN, DP and CAN before a gateway.
After a power cut, a fieldbus sensor still knows position from the magnet, no homing. Parameters survive only if stored; CANopen needs a write.
Twenty FAQ on magnetostrictive sensors, one line each: resolution 1 to 100 um, repeatability near 0.002 mm and the 2830 m/s waveguide speed.
Jumpy readings trace back to the magnet, the only moving part. Five fit defects - coaxiality, gap, reversed polarity, loose fasteners, ferrous parts.
IO-Link magnetostrictive sensor frees the last hundred metres: one device per port, then a master sends value and events to PROFINET or EtherCAT.
Start-Stop magnetostrictive sensor pulses on the echo, so the controller times interval by wave speed. Simple wiring, but it needs a fast controller.