EinW

There are all sorts of amateur chemical rust removing techniques, and some electrochemical ones, many of which eat away lots of good metal as well as rust – all the dip-it-in-acid types, for example. Even ‘safe’ acids like vinegar and citric eat metal as well as rust. Commercial rust eaters have a mixture of chemicals (some well-guarded secrets) to dissolve ...

A touch more work over the weekend for the rev counter into a solid form that can be tried on the cnc lathe when it is re-assembled. Although some potential upgrades have been identified, the software is in a thoroughly usable condition. Find other Engineer in Wonderland cnc stuff here In the photo on the right, it is sitting in ...

Mechanical stuff never ceases to amaze me. The latest revelation is that one can weigh an aeroplane flying overhead from the ground. At least, that is what a YouTuber called Brian Haidet – a materials science PhD – has demonstrated in a video on his excellent AlphaPhoenix YouTube channel. En-route, he built a set of scales about 2m long and ...

The cnc lathe rev counter prototype now works – with a bit of help from friends who can actually programme. On a signal generator, the display is rock-solid and spot-on – the crystal on the Arduino Pro Micro clone is doing its job. Find other CNC-related Engineer in Wonderland blogs here Attached to the perforated 48 hole synchronisation wheel output ...

The parts arrived for the RPM meter that uses an Arduino and reciprocal counting to get a three-times-a-second update rate with 1rpm resolution. Arduinos plus ready-made modules are a very qick route to custom test gear, although this time the TM1637 based display module introduced a couple of spanners: Find other CNC-related Engineer in Wonderland blogs here Firstly, the ebay ...

I have a sub-project – to measure rpm using a disc with 48 slots. This is part of the cnc lathe project, and as it is for speed control the display needs to update three to four times a second. If it could update every 1.25s, the answer would be easy: simply count input pulses for that time to get ...

The cnc lathe project needs a controller to replace the 40 year old custom controller within the lathe. It is a shame this has to be done, as it was capable of automated thread cutting, which appears to be the holy grail of home-build cnc lathes. Find more on the cnc lathe project here The in-built controller might even still ...

Some sort of sane no-volt release and emergency stop needs to be applied to the cnc lathe project (when time allows….) And before that time is available, so thought has to go into what arrangement is acceptable. Find more cnc lathe project blogs here It seems a shame to cut too many more new holes in the front, and certainly ...

Thanks for the help with the mystery tantalum capacitor on the Jay Electronics motor controller board – that is on its way to the bin as a consequence. Now that I am properly worried about capacitor failure, I have taken photos of two of the capacitors on the same board (plus the lovely new electrolytic replacement already installed – bottom ...

For those wanting a little more on the advantages of GaN power transistors in small mains power supplies, ElectrArc240 has created an excellent YouTube video. ElectrArc240 has clearly knows what he talking about and has spent a long time testing different aspects of two similar power supplies to succinctly demonstrate their differences: one with a GaN hemt main switch and ...