Exploding Generator Batteries

One of our customers recently had an incident were a generator starter battery exploded whilst it was on charge. Some electricians had moved the batteries so that they could work in that area and some time after they had put them down one g...

Wohlenberg Guillotine Multiple Faults

We were called out to look at a Wohlenberg MCS-2-TV guillotine for a local packaging company. The machine's video display was gradually fading out to a blank screen (video demonstration below). The display would come back after turning the ...

Transformer Rewinding for Ultrasonic Power Module

This week I worked on an Ultrasonic Power Module ( Artech Ultrasonic DGS35-200-T ). It is a 200 watt power module that produces frequencies in the range of 30 - 38Khz. It is coupled to 2 transducer heads that shakes very fine screens in or...

Getting data to the cloud (via an ESP8266)

One of the more common services that we carry out is data logging of signals in an industrial environment. The EDM is our main tool for this task and its 6 analog inputs do a great job of picking up a range of signals (currents, voltages et...

Wohlenberg Keypad Display Repair

Over the last week we have been working on a Wohlenberg 115 Guillotine (built in 1999). A large number of the keys were no longer registering key presses which made the whole machine difficult to operate. These large membrane keypads often ...

Battery Bank Earth Fault

Recently we had a really unusual fault with one of the UPSs that we maintain. The UPS is a 200kVA Delphys Green Power model from Socomec. It is about 4 years old and has been very reliable and easy to maintain to date. We had performed a...

Solid State Relay Redesign

A solid state relay was sent in to us for repair recently. From viewing the board it was clear that a couple of tracks had been blown off the board. Running some external wires to replace the blown tracks would have been a quick fix however...

Tracing a Eurotherm 425 SS Contactor Circuit

We recently received three Eurotherm 425 Solid State contactor's in for repair. These units were designed to be a low cost replacement for mechanical contactors. They are used for switching single phase resistive loads up to about 40A. S...

Wrapper Stretched

Just had an interesting problem with a pallet wrapping machine at a local plastic bottle manufacturer. It is used to wrap clear plastic film around a pallet of plastic bottles with a sufficiently small tension so that they don't get crushe...

Fibre Side lay sensors

The input end of a Komori printing press includes a system for ensuring that either side of the paper is butted up against a known edge. The way it does this is that there is a paper detector setup in line with the edge that detects if the...