Here is a list of all the postings Barrie Lever has made in our forums. Click on a thread name to jump to the thread.
|Thread: Notre Dame|
The French will move heaven and earth to restore Notre Dame, a French billionare has already pledged 100 million euro's towards the rebuild.
There are people with the skill in the World to do the work and if the French struggle to get the skills from within to do the job then the right people will be bought in.
I guarantee you that the Notre Dame will be rebuilt to it's former glory.
|Thread: Printing small parts for car restoration|
Porsche Silverstone recently done a restoration on a 924 Martini special edition from 1977 and they 3D printed the the plastic clips that hold the petrol pipes on the under body. The original clips were no longer manufactured
As time goes on this process will be used more frequently in restorations.
|Thread: Further Adventures with the Sieg KX3 & KX1|
Take a normal simple pocket operation, at some stage the cutter is going to need to cut at its full width, so to allow for this max strain upon the cutter and machine, you either have to set the DOC lower and maybe make two passes or run slower than ideal.
The same pocket with adaptive clearing would be approached with a spiral entry into the work piece creating a hole somewhat bigger than the cutter diameter. Generally step over tends to be smaller with adaptive strategies, you can see that Jason was using probably a 15-20% step over (maybe 1mm) on the 6mm cutter. So the tool never sees the load of the full width (6mm in this case). Maybe you can see what I am describing in the screen shot, this was for a carbon fibre machining job (very abrasive !!).
This allows you to use the side flutes of the cutter more effectively rather than stepping down in a number of passes, tool life is extended by some margin. You can also run hobby machines closer to industrial feed rates albeit with smaller stepovers.
Some adaptive strategies allow climb and conventional milling in the same tool path, so in this case the tool would have zig-zagged backwards and forwards.
You would think this would always be an advantage but not so, particularly if the cuts are long it is quicker to rapid back to the start. I think in Jason's example though zig-zag (climb/conventional) would get material off quicker.
Modern CNC machining (HSM) seems to be favouring taking lighter cuts on the side of the tool and with very high feed rates. Rather than old manual techniques which I think tended to go for big stepovers.
If I followed Jason's reports more closely I would see what CAM package he is using, of course the package may not have adaptive zig/zag.
Edited By Barrie Lever on 14/04/2019 09:39:13
Edited By Barrie Lever on 14/04/2019 09:41:45
Edited By Barrie Lever on 14/04/2019 09:48:48
Edited By Barrie Lever on 14/04/2019 09:50:33
|Thread: Myford ML10 lives again|
That is a really nice restoration, that will do you some nice work.
|Thread: Moving from Warco WM180 to a Myford ML7B ?|
Trouble is Ollie all you chaps with 254's are hanging onto them because they are so good.
I probably should have said that the majority of my turning is on aluminium parts.
I will read your tests in more detail later.
Anyhow some quite strong arguments in favour of the old Myford.
Firstly I would assume that the Myford was in good condition, therefore anything to do with poor maintenance and abuse is out of the window in this discussion.
I see positives for the Myford is the machines mass, this always helps with ridigity and damping vibrations, thus accuracy and finish , Myford will be acurately aligned.
I never find a small spindle through hole a problem, I turn 50mm diameter material 250mm out from the chuck on my Compact 5 using a fixed steady and centre, I would do the same if using a Myford.
The slow spindle speed is not really a problem with carbide inserts, I had never even heard of carbide inserts being a problem at lower speeds before joining this forum. I always use carbide tooling unless I need a special wierd shape tool which I grind from HSS as required, I often turn at 200 rpm with carbide in my EMCO Compact 5. Carbide also does not mind taking wafer thin cuts, that is another falicy perpetrated on this forum.
I would say that the slow spindle speed will likely give the Myford good torque for harder turning jobs assuming it has a resonable size motor fitted. the WM180's 600W will soon get gobbled up on a tough job. The WM180 in size etc looks similar to a Compact 5 excepting that the WM180 has more centre height, I would say that the WM180 and Compact 5 are in a similar league regarding size capability.
I would never consider a Compact 5 to match a an ML7 in anything other than accurcay assuming work is taken slowly, the Myford is whole chunk bigger than these smaller lathes, I have owned both and I would prefer a Myford 7 to a Compact 5. I therefore struggle to see how Kevin will find moving to an ML7 as anything other than a good step forwards.
There is a reason that Myfords are very popular and expensive in the second hand market and it is not vanity!!
Edited By Barrie Lever on 09/04/2019 19:16:11
Edited By Barrie Lever on 09/04/2019 19:19:39
More or less everything assuming it is in good condition, a great lathe.
And no I do not own a Myford but have in the past.
|Thread: Machinery Directive and CE marking|
Thanks for the image.
At very best that is deciptful.
Of course my purchase decisions are coloured by these kind of tricks.
Edited By Barrie Lever on 06/04/2019 09:42:34
Well you are in the majority, I would wage good money that more people in the World think that a CE mark stands for China export than anything else !!
I know you were joking but I am not sure that my response is a joke, I might actually be correct.
All joking aside the CE marking scheme is a complete farce, it only works if everyone plays by the same rules.
I know of items like serious radio control sets having CE marks that are issued by some tiny test house in Malaysia, there was no way that the test house could carry out a proper CE test.
There is even difference of opinion between German machine tool factories on what is required from say machine safety encosures to be CE compliant.
Like I say, pick the bones away and it is a joke.
|Thread: RIP Chris Moore|
That is sad news when such an iconic name in model engineering passes.
Hopefully someone will write a fitting obituary of Chris Moore.
|Thread: Chinese 7x10 lathe|
Are you able to tell me the difference between trading with a vendor in the EU post Brexit and trading with a vendor in the USA for example?
I just don't see that there is any difference but I have not done my homework on the details.
Life will go on.
I think it would be unwise to buy a cheap Chinese lathe from a source slightly cheaper than the UK suppliers, the risk matrix does not look good for small savings on what is already a small amount of money.
|Thread: Resurfacing a Cast Iron Enamelled Bath.|
What sort of chemical metal did you use? Polyester based metal fillers will not get as good a 'bite' to the surface as epoxy types, the best epoxy based products will also have additional keying agents within their composition.
When you say that the flakes falling off curl, that would imply that there is a fair degree of shrinkage in the Rustolem product.
With any bonding operation the key to success is in the preparation and that might be quite a bit more effort than expected.
Edited By Barrie Lever on 31/03/2019 10:10:02
Edited By Barrie Lever on 31/03/2019 10:10:33
|Thread: Advice on Choosing A Mini Lathe|
I have visited the Sherline factory, very interesting and the machines are really amazing at how adaptable they are.
Plus a huge range of accesories.
Personally for a mini lathe I have a Unimat 3.
|Thread: Mini boring tool|
Can you give a hint or a link to where you signed up for that account?
I found their WNT division, is that it?
|Thread: WT2527 15cc Glow Engine|
I was very impressed with the tick over, shame you have lost some of that for top end performance.
What prop size are you running?
|Thread: miniature 3 pin sockets|
If the OP had an unlimited budget then he would not be posting on a model engineer forum for an answer - simple, the big connector companies would be more than happy to furnish him with something very nice if he was involved in a medical project. HE IS NOT!!
The opening poster is using three sensors to measure temp. of the cylinder head, fuel and carb on an Austin 7, we know now that the sensors are not type K.
So all of the suggestions so far will work, although I favour JST type RC style connectors due to their reliability and low price.
Piece it together and you will get there, but the World will have moved on by then.
Take a look at RC servo extension leads, they are as cheap as chips, they come with 3 colour ribbon leads attached, the connectors are polarised and they are reliable and you could have them on your doorstep in the morning.
You could fit the socket part of the lead into the case wall if it exists or if the project is not enclosed then just have a flying lead to the socket.
|Thread: Collet Chuck or not ?|
|Thread: DraftSight no longer free|
No cash from me, I don't use 360 although it looks good.
I pay for my software and know where I am with it, so as to speak.
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