//www.pay9987.com/en.html Germanjet magnetostrictive displacement sensors in China — German technology with authorised local sales and support. en Tue, 29 Sep 2026 16:13:38 GMT //www.pay9987.com/en/news/n183.html //www.pay9987.com/en/news/n183.html When sync drifts out, the two most convenient actions on site are changing control parameters and swapping the magnetostrictive displacement sensor. Both are usually wasted effort. The correct order is bottom-up through four layers: mechanical backlash and distortion, then hydraulic split, leakage, oil temperature and trapped air, then mounting and calibration of the position feedback, and only then control parameters. A ten-minute static versus dynamic split narrows the direction first. Technical Q&A Tue, 29 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n182.html //www.pay9987.com/en/news/n182.html Every multi-cylinder sync scheme reduces to one of three: enforce it with structure, split the flow, or close a loop on position. All three work, in different territory. Mechanical sync is easiest when spans are short and strokes are small, a divider valve is enough when the load is symmetric and the tolerance loose, and servo closed loop becomes unavoidable once the load is asymmetric or the tolerance reaches a few parts in a thousand. A three-step test decides which applies. Technical Insights Tue, 29 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n181.html //www.pay9987.com/en/news/n181.html Two cylinders push the same beam. The command is identical, the valves are identical, and the beam still runs crooked. The problem is not tuning. A divider valve synchronises by splitting flow, and with no position value anywhere in the circuit four errors stay uncorrected: the flow split itself, flow shifting under asymmetric load, oil compressibility, and internal leakage plus oil temperature drift. The position difference keeps accumulating along the stroke until something else stops it. Technical Insights Tue, 29 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n180.html //www.pay9987.com/en/news/n180.html We ran all ten injection moulding machines on site up to maximum ejector speed. Only one reading jittered; the other nine stayed steady. The cause was not the sensor: on that smaller machine the mounting plate was not rigid enough and too thin, so at speed the plate resonated like a tuning fork and fed high-frequency vibration down the cantilever into the sensor core. A replacement sensor would not have helped. Fitting an anti-vibration base cleaned the waveform immediately. A second, separate fault turned up in the same batch: installation over-travel, with the slider passing the black mark on the housing at the bottom of the stroke on several machines. Technical Insights Tue, 22 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n179.html //www.pay9987.com/en/news/n179.html Both sensors on an injection moulding machine — clamp and injection — are isolated by a pair of anti-vibration mounting clips. The original factory guide turns on two numbers that have not changed in over a decade: a 42.5 mm hole pitch and a tightening torque of 3.5 kgf·cm. Torque has to be applied with a slipping-type driver and stopped at the click — too much crushes the elastomer, too little leaves the screw unseated. Each pack contains two clips and four washers, and not one washer can be skipped. The guide closes with the two site causes of a driver that clicks without clamping: a broken tap left in the hole, or poor thread quality. Product Knowledge Tue, 22 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n178.html //www.pay9987.com/en/news/n178.html On an LK 3500-ton injection moulding machine a 3800 mm analogue sensor showed 6 mm of jitter. A 6.5-digit voltmeter and a 3 V battery split sensor, cable, controller and display section by section: the sensor itself jittered only 0.0005 V, about 0.19 mm. The 6 mm came from a bundled cable run, poor machine earthing and door-drive interference. Product Knowledge Fri, 18 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n177.html //www.pay9987.com/en/news/n177.html Where magnetostrictive displacement sensors are used: built into hydraulic cylinders on injection moulding, die casting and press machines; mounted externally on a bracket for rolling mill roll gap, press brake rams and gate openings; and on tunnel boring machines, where dozens of thrust cylinders have to be read at once. The common demand is accuracy, non-contact measurement and resistance to oil, dirt and vibration. Advantages: no wear, high accuracy, long stroke. Limitations: higher cost than a conductive-plastic electronic ruler, and a built-in sensor means work on the cylinder body. Product Knowledge Wed, 16 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n176.html //www.pay9987.com/en/news/n176.html SSI is a synchronous serial digital output: clock plus data, no supply carried in the signal pair, and not a fieldbus. It can only be read by a PLC high-speed counter card or a dedicated SSI interface, and it cannot be converted to 4-20 mA or to a bus the way an analogue signal can. The right move is to fix the output type during selection — 4-20 mA or 0-10 V for an analogue input module, CANopen, Profibus-DP, EtherCAT or Profinet for a bus. The article ends with the correct four-wire 4-20 mA connection. Product Knowledge Tue, 15 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n175.html //www.pay9987.com/en/news/n175.html Five heavy industries measured by displacement sensors: a die casting machine tracks injection and clamping stroke, a curing press tracks platen opening, a press brake tracks ram descent, a tunnel boring machine tracks thrust cylinders and segment attitude, and a steel mill tracks roll gap and the lifting table. Each section covers the working principle, the measuring position, the wiring and the selection points, plus on-site mounting and maintenance advice. Product Knowledge Mon, 14 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n174.html //www.pay9987.com/en/news/n174.html Where displacement sensors go on an injection moulding machine: mould clamping, ejection and injection each need one electronic ruler, and the stroke, output type and mounting differ per axis. The article gives the wiring diagram and the steps from installation through to production, and explains what changes when an ordinary electronic ruler is replaced by a magnetostrictive sensor on the clamping and injection axes. Product Knowledge Sun, 13 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n173.html //www.pay9987.com/en/news/n173.html Troubleshooting a hydraulic cylinder displacement sensor starts with a three-step good-or-bad test that needs only a multimeter: check the supply voltage, then the signal output, then the insulation between windings and housing. A reference table covers jumping readings, no output, drift and shorted signals with the likely cause and the fix, followed by the replacement procedure to use once a failure is confirmed rather than assumed. Product Knowledge Sat, 12 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n172.html //www.pay9987.com/en/news/n172.html A full guide to hydraulic cylinder displacement sensors: why the built-in magnetostrictive type is used, how the magnet ring rides with the piston and position is measured without contact, how to wire analogue four-wire and digital outputs, the four mounting rules for an oil cylinder, and how to set stroke, zero and direction. Includes a parameter table for built-in cylinder series and points to compare when choosing a brand. Product Knowledge Fri, 11 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n171.html //www.pay9987.com/en/news/n171.html Installing and commissioning a magnetostrictive displacement sensor: choose between external and built-in mounting, then follow the mounting steps, run a three-point check after power-up and adjust the parameters. Zero, span and direction are the three settings that are normally re-done after installation; a long stroke rod needs mid-span support, and the magnet ring must not rub the rod. Product Knowledge Thu, 10 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n170.html //www.pay9987.com/en/news/n170.html Displacement sensor selection runs in five steps: stroke and mounting form, output signal, accuracy, environment and finally the interface. The order matters because each choice narrows the next one; picking an output before the stroke is fixed is the most common mistake. Written around magnetostrictive displacement sensors, with a quick-reference table of parameters and the points that decide cost. Product Knowledge Wed, 09 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n169.html //www.pay9987.com/en/news/n169.html A magnetostrictive displacement sensor measures position by timing a pulse along a waveguide: the electronics send a current pulse, the magnet ring on the waveguide produces a torsional wave, and the return time is converted into position. The illustrated guide covers the measurement chain and the accuracy source, then compares open magnet rings, which clip on anywhere, with closed rings, which slide over the rod and resist shock better. Product Knowledge Tue, 08 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n161.html //www.pay9987.com/en/news/n161.html Long SSI cable, then readings jump at rest? Drop the clock on an SSI displacement sensor: 1 MBd fits under 3 m; beyond 200 m it falls to 100 kBd. Technical Q&A Tue, 08 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n168.html //www.pay9987.com/en/news/n168.html A displacement sensor wiring guide: mounting steps first, then the principle of separating supply from signal, then how to wire four-wire 4-20 mA. Magnetostrictive displacement sensors keep the power and the signal loop fully independent, and getting the polarity or the shared 0 V wrong will destroy the sensor. Three common field mistakes and the checks to make before switching on. Product Knowledge Mon, 07 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n160.html //www.pay9987.com/en/news/n160.html Stuck at 0? On 4-20 mA a magnetostrictive displacement sensor still reads ~4 mA at stroke start; an open cable falls near 0, which 0-10 V cannot show. Technical Q&A Mon, 07 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n167.html //www.pay9987.com/en/news/n167.html Jumping readings on an analogue electronic ruler are not always the ruler's fault. Three-step dry battery isolation: break the ruler end and feed in a 1.5 V or 9 V battery - steady means the ruler, jumping means wiring or controller. Then break the controller end and repeat: the same jump points to the controller, a smaller jump to both, no jump to the cable. Also check four-wire wiring, single-ended shield earthing and a stable 0 V supply; longer strokes amplify the same interference. Product Knowledge Sun, 06 Sep 2026 00:00:00 GMT //www.pay9987.com/en/news/n159.html //www.pay9987.com/en/news/n159.html CANopen 194 and Profibus 195 look serial but differ in layer: CANopen is a 120-ohm pair for mobile machines; Profibus keeps an S7-300/400 DP network. Product Knowledge Sun, 06 Sep 2026 00:00:00 GMT