Hi All
Well here goes……
But first I must pay my respect to many exceptionally gifted members of this site that give so freely of their time. There is never a day when I do not learn something from reading these posts.
From my first recollections as a child I liked to know how things worked, much to my parents chagrin when I took apart the vacuum cleaner (Hoover) and various other appliances to their detriment at first; they would not go back together, although soon I got quite good at it and even managed to do basic repairs. My Meccano set was a prised possession. For me making stuff was to become a way of life.
My working background started in textiles. A parent had run a clothing manufacturing business that unfortunately failed in a recession in the 60’s. That convinced me that fashion was a bad Idea, however I did have knowledge of the sewing industry and decided to use that and started a small wholesale manufacturing business serving the retail furnishings industry with my wonderful wife. We had no money 2 old machines and a table we set up in a disused loft above a knitting factory. Our main focus was the design trade. After 3 moves we bought a decent factory. I have always been interested in engineering. The practicalities of manufacturing ensured that my engineering skills would always be needed. Over the next 30 years we designed and built some interesting machinery from basic jigs to CNC profile stitching. It also took me to England twice a year for most of that time Visiting suppliers. I still have many friends in the UK.
After 30 years we decided to change tack and for the last 8 years have been involved in building dwellings. The jump to building was easy having worked in the design industry. we are currently working on 2 projects.
I also taught myself to program firstly with quick basic then on to Access VBA and now VB.Net. The Costing system I developed is still in use by the new owners. I am not retired but have more free time than before. For CAD I use AutoCAD Nearly always in 3D Solids now for engineering. I am also trying to learn Revit for building.
Having left school early due to the collapse of the family business I had to self educate myself and make a living for myself from that point on.
If I have a regret it is that I did not become an Engineer. It was silly to chase the almighty dollar instead of getting a higher education. However the Business I started allowed me to hone my engineering and design skills. allowing me to accumulate a substantial library, pretty good workshop and a good life. When I travelled up the East coast from NYC to Bar Harbor last year we stopped at almost every secondhand bookshop on the way. And a few second hand tool suppliers too. Over that month we had to US post every second day ferrying the books back to Australia. My wife has a degree in Art history and Philosophy so we always go to opposite ends of the bookshop. The engineering books are always at the back on a bottom shelf if at all. We are going back to the US next year this time going south.
Engineering wise I am still working through the design of a CNC Mill. If you Google "Epoxy CNC Mill and method" you will find A few posts about it and links to the 3D CAD files. Time has been hard to come by lately but I plan to start building soon. It will be a huge learning curve.
The CAD files have been downloaded 970 times so far from over 50 countries, many in the third world. I hope it inspires the downloader's to design and build something for themselves.
I also recently built the mechanism for a tower clock for a friend. it uses 2 step motors to drive the hands, quite a beast it took two us to carry it. My mate is an electronic engineer he did the electrics it was a good collaboration. And yes it used Cast Epoxy timing Gears.
A young artist friend, a schoolmate of my Sons. asked me to make a drive for an "Installation" This was a 2 Metre wheel fitted with 3 x 23" TV screens that turned at one RPM. Quite a fiddle it needed slip rings to drive the screens (From Moog amazingly small 6 x 2 amp 240v circuits about the size of a matchbox). It all had to fit in a 115mm thick column. and be made in a few days! Plenty of hours on that one. The drive was a stepper motor and controller fed by a small pulse generator. Chosen because it was fail safe. if someone puts their hand on the wheel it just stalls. Even in that state it barely gets warm.
If you have a workshop life is always interesting……..
Cheers
John
Edited By John McNamara on 09/07/2012 16:05:10