TechArchive

Original article date: July 2000 The other day, I installed a telephone extension socket. The kit from B&Q included the cable and clips, the new socket, and all the instructions for tapping into the existing BT socket. Wiring into the new socket was an annoyingly fiddly job, and I was not looking forward to something [...]

Original article date: May 2000 PM-driven dynamometers to 300kWAndy Gardner of Meiden Europe explains why permanent magnets keep the heat down in dynamometers – and why it’s a good thing. Permanent magnet motors are now being used by Meidensha Corporation for a new range of dynamometers with continuous ratings up to 300kW that eliminates gears, [...]

Original article date: January 1998 Why hasn’t planetary gearing been adopted more in the UK? It’s also normally possile to replace an existing gearbox with a planetary equivalent. Here’s the case in favour of this type of motion! As buyers of foreign machinery will notice, planetary gearing has a far higher market penetration elsewhere in [...]

Original article date: April 1999 In only 3 years from the first stereolithography product from 3D Systems the company has now launched its first office-sized machine no larger than an office photocopier. Developed by 3D Systems in Valencia California the Actua 2100 is a 3D concept modeller no larger than a standard office photocopier. It [...]

Original article date: May 1999 A couple of issues ago I talked about streamlining the purchasing process by creating “plug and play suppliers”. I received some correspondence from readers pointing out that every day, goods-in departments and accounts departments key in large amounts of data (eg delivery note numbers, order numbers, invoice numbers) when these [...]

Original article date: June 2000 It has always infuriated me that I cannot view a standard via the web to see if it is the one I want to buy. BSI clearly thinks that such a resource would be abused, and that even it it charged a small fee for an online read – say [...]

Original article date: June 1999 Emotron launched the MSF range of soft starters to coincide with the industry fair at Hanover. A new starting method means that mechanical and electrical stresses can be significantly reduced Soft starters are used for gentle starting and stopping of induction motors. Pumps compressors mills fans and saws are applications [...]

Original article date: November 1997 The term fatigue, when applied to a load cell or torque sensor, is one of the least understood terms in the transducer industry, says Paul Armstrong of Amber Instruments. Typically, sensors that are manufactured for general purpose applications have been “de-rated” to one-half the normal output and then called “fatigue [...]

This article was originally written in the period 1995-2000 Gabor Martell, Managing Director of Montford Instruments, explains the principle of HARASS testing of products incorporating electronics. Thermal stress screening is an established way of exposing hidden faults which do not show up during normal testing. This happens because sub-standard components and connections often function correctly [...]

Original article date: March 1998 I’ve just come back from skiing. Well OK, snowboarding (that explains the pleasant aroma ­ Ed). Well, OK, falling over a lot in the snow. And the Winter Olympics are all over the TV, so it seems like an appropriate topic for a discussion. Let’s take a (UK pounds)15 ski [...]