Member postings for Mike Poole

**LINK**

I think this link covers jacobs chucks find the size you want then google

Mike

A drill speed contoller would give you variable speed but poor regulation under load, if you want servo type performance you will need a control system with speed feedback.

Mike

I was impressed that my dentist can make a crown or inlay by taking pictures of the missing tooth space or cavity for an inlay, then the computer produces a 3d model which he tweeks to his satisfaction,  a high speed twin head milling machine produces the crown from a machinable ceramic colour matched to your teeth. Check out cerec crowns on you tube.

Mike

Edited By Michael Poole on 19/07/2012 21:16:39

**LINK**

I think you need one of these.

Mike

ps here is the  data sheet

http://www.phoenixhydraulics.co.uk/file.php?filename=DC.R.28.PB%2FDC+Drive+couplings.pdf

Edited By Michael Poole on 18/07/2012 22:08:23

Edited By Michael Poole on 18/07/2012 22:08:36

Edited By Michael Poole on 18/07/2012 22:09:04

I would suggest that a hacksaw blade is still pulled through the work by the front mounting of the frame, although we apply a pushing force to the frame the blade will be held taut by the frame and pulled through the work. Using a hacksaw blade in a pad saw handle is useless with teeth facing forward, but even facing backward the blade has little strength and very little power can be applied to the cut. The importance of the frame being able to maintain tension during the power stroke is critical to blade life, all hard blades shatter and bi metal twist and sawing with a kink in the blade is no fun. If you cannot apply enough power to make the blade cut its life will be short, I find an all hard blade with a bit of lubrication will have a very long life providing you don't break it!

Coping saws and fret saws are definately pulled through the work by the handle end, as the frames are not sustantial enough to resist even the more moderate forces of fretwork and coping saw tasks.

The junior hacksaw frame is not usually substantial enough to resist even the moderate cutting forces used in junior type tasks and there is a real benefit in having teeth facing backwards

Mike

I always use teeth forward as you can use your weight behind the saw, the pull technique is all muscle power. The most important thing I find with a hacksaw is the frame, I inherited a frame from my grandfather which is an old Eclipse pistol grip type with the frame made of solid flat bar, fitted with an all hard blade this is a pleasure to use, bi metal blades do not seem to cut as true but they certainly have their uses, like cutting conduit in the vice attached to a bender, an all hard blade will last a few strokes, but a bar of steel in a decent solid vice all hard is the way to go for me. As an apprentice I bought an eclipse pistol grip saw with a tubular frame, this is awful, the frame is not rigid enough and the blade seems able to twist too easily, almost no hope of cutting true and square. I have never got on on with the frames with a file type handle but I am sure they have their fans.

Mike

Martin

Yes I work at Cowley as a control engineer in body in white, the population of ABB robots is once again going to increase as they are the robot specified for the new Mini after 12 years of Kuka. I bumped into Dave Uttridge and his brother at the Sandown show about 18 months ago. I was on a course at MK ABB with Dave and he left us to watch a video of some robots which finished while he was having a smoke and ran on to some video of his traction engine steaming up and down his drive, most entertaining.

Mike

ps. I cannot put a face to your name but I am sure you would know Dave Cusden and Peter Tolputt, both have now retired and I am thinking more and more about it.

Edited By Michael Poole on 07/07/2012 21:06:31

Edited By Michael Poole on 07/07/2012 21:07:39

Loved metalwork and engineering drawing at school, my tutor group met in the library for registration, Model Engineer was the most interesting magazine on the reading tables. Served my apprenticeship with British Leyland as a maintenance electrician, worked in the tool room as an electrician, a very interesting place to work as it was like a history of numerical control (before it became CNC). Th oldest NC machine was a Wadkin coordinate drilling machine used for jig boring type tasks, this had an EMI NC control with valves and toroidal transformers.It had glass inductosyns for position feedback. A Cramic with a Ferranti NC control, spirodisc encoders producing moire fringes and magnetic tape for data input. lurking in the end of one bay was a large Cinncinatti Hydrotel mill, this is where the operator takes a ride with the spindle to see what is happening, room for a maintenance man too, the control was Cinncinatti Acramatic One, transistors by now but lots of mercury wetted reed relays and toroids, absolute resolver feedback by gearing three together in an assembly as big as a bucket, eight hole punched tape for data input, much better than mag tape as you could read the tape by eye, a bit laborious though. Another interesting machine was an R&D experiment, a spark erosion machine big enough to make a die for a car panel. In 2 months I will have 40 years working at the same plant now making the MINI under the ownership of BMW . The old tool room has just been demolished to build a large extension to the body shop for the next MINI, somehow 1000 robots are not as interesting as some of the old machine control systems when you could fault find to component level. I have just built my workshop extension as the end of the garage and a tool buying addiction filled the available space. The addiction is better now as I can visit eBay and tool shops and not buy anything, although a Japanese wood chisel made me buy it recently and I am not really into wood! The yen to buy a Myford was with me from about 17 but motorbikes and beer never left me enough money to buy one, after raising a family an understanding wife agreed I did need a Myford and I now have very nice ML7R and after being given some free money for industrial deafness a Warco VMC joined it hence the need for the extension. I just need to retire now instead of working 7 days a week for the Quandt family

does the mill have a dovetail overarm? maybe it fits the other way up.

Mike

I initially purchased an imported machine and learned about what makes a good drilling machine the hard way. The machine I had was satisfactory for wood but the table flexed under heavier drilling. I then bought a Meddings MF4 this has a wide range of speeds from 80 - 4000rpm and a table that does not move (apart from up and down) Meddings philosophy is if you want an angle then use a fixture, a table that can be relied on to be square is a godsend. Unfortunately when the table clamp was loosened gravity did its best to take the table to the bottom of the pillar luckily ebay came to the rescue with a machine that was basically a right off but the rise and fall table was in good nick so i now have my ideal drilling machine Total outlay £225.

Mike

Ps I could pick up and carry the import but the Meddings is very heavy and can only be walked across the workshop if it needs to be moved.

Edited By Michael Poole on 21/03/2012 19:03:04

And the skirting ladder, the tartan paint and the metric adjustable.

Production managers when enquiring about a breakdown should be advised there is an anti matter leak from the plasma conduit or problems with the back pedaling floo floo valve, they go away happy and report the info to their boss

Mike

I would agree that many people could make a workmanlike job of a domestic electrical installation. The parts where people fall down is the design part of an installation where most will not have a clue where to begin and the testing of the completed installation where most people will not posess the test equipment or knowledge of how to use it. As usual the dangerous people are the ones who think they know what they are doing but don't know enough to realise that they don't know what they are doing.

Mike

Devcon make a range of metal repair materials, eye watering prices though!!

Mike