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: water supply|
United Utilities are fully aware of our rainwater harvesting system as they came out and asked why the water bills were so low, I showed them the rain water harvesting which is a German Rewatec system, they were quite happy and ran off to annoy someone else, they did however read our water meter monthly for about 6 months after this.
Maybe you could qualify your original post with what water authority you gleaned your information from and modify the post accordingly as it seems to be inaccurate at the moment.
Rainwater harvesting is a responsible thing to be doing on any domestic installation IMO.
|Thread: sulphuric acid|
If you have to take responsibility for your sewage systems correct functioning as we do with a micro sewage treatment plant, then you take a whole different approch to flushing anything other than human waste down the toilet !!
A micro plant can easily get upset by chemicals that it is not able to deal with, the water companies must struggle with this in the big city sewage plants.
|Thread: water supply|
How is that? We have a 7500 litre rain water harvesting system, apart from installation costs we do not have to pay anything for it.
The house has three water systems, normal hot and cold being two, and a third rainwater circuit to all toilets and clothes washing machines.
The rainwater is also very good for washing cars.
We also have a micro sewage treatment plant which produces near drinking quality water as the discharge.
|Thread: DraftSight no longer free|
Fusion 360 will be next, now that the stupid little spat between Dassault and Autodesk is probably over.
You will hear the cry's all over the country then.
|Thread: Binding on axis when locking off other|
Thanks for the explanation of the screws, non of my machines have tapered gibs.
Is it possible that there is some missalignment between the two X axis dove tail (front and back) and when the lock handles are tightened it imparts a twist into the 'Y' axis carriage?
I had something similar happen on a EMCO V10P when tightening a SOBA vice to the cross slide, because the vice was concave on the under side it imparted a stress into the cross slide that made it bind up somewhat. The vice is just used as a workshop weight now as that it is all it is good for.
I think you have pretty much answered your own question when you mention the dark oil, something on that 'Y' axis carriage is flexing.
There is a lot going on in that 'Y' axis carriage as the 'X' axis locking screws start to work.
I would say that a tolerance on the 'Y' axis is probably tighter than normal coupled with a casting that is slightly more flexible than normal results in the binding.
What is the function of the large slotted screws in both carriages?
As a matter of interest my German mill of similar travel dimensions (more in the X less in the Y) has a much lower saddle profile, but does not have those large screws that I asked about.
Everything flexes, it is just a matter of to what degree and to how much force has to be applied.
|Thread: Motorcycle 'blipping'...|
A modern superbike engine is a masterpiece of combustion engineering, they will sit ticking over for ages and then just pick up as if nothing happened, some of the engines have such a huge rev range that the bikes can touch 100mph in first gear.
Blipping on down changes does seem to make matching the engine speed to the next gear a little easier, I think it might be because the RPM is decreasing from the blip as the clutch is re-engaged making the final matching of RPM easier than if the engine RPM was too low.
2 strokes are another thing regarding staionary blipping, that is to keep the engine from gassing up, there is nothing like the sound of a 2 stroke 500 GP bike being warmed up in the pits.
|Thread: Shipping heavy models|
How heavy is the chassis?
I have sent EMCO Compact 5's to Sweden and Finland with no problems via TNT.
The EMCO pallets when loaded were a two man job to lift, TNT prices were very reasonable (about £135.00) and covered by the buyer.
Pallets were delivered inside two days.
No special packaging required just a light wrap with polythene. The closest the chassis will get to the sea if using TNT,DHL etc will be when the pilot looks out of the cockpit flying over the channel !!
A completely painless exercise once on a small pallet or similar.
|Thread: Colchester Lathe Factory|
He did, it was part of a thread about visiting China, the video was neither like the Colchester or the modern Chinese factory.
As a country we have really screwed up somewhere, to go from that to where our industry is now is nothing short of criminal.
OK this has to move up and down regularly, is that the case?
An interesting thing on ball screws holding a weight up, on Wabeco CNC mills with dovetail guides there is no counterbalance weight for the mill head, the friction of the dove tail and stepper motor drive holds the mill head, on Wabeco mills with linear guides they have a counter balance weight for the mill head, must just be the reduced friction in the linear guides.
300Kg spread over a number of points or area is not a lot of weight to support and could easily be engineered with wood beams etc.
To be honest this problem is little more than school boy engineering.
OK we know there is a weak floor which we have to stand a 300kg object on it, and that the object has a reasonable plan view area.
So is the floor capable of being walked across? If so can a heavy man (100Kg) stand on one heel? I think this is quite likely. So now we have a point loading and area (100Kg over 0.0064 sq metres) that the floor can likely take.
Add a safety factor of 2x in to the areas and use Neils suggestion of a car jack on a pad, the size of which can be calculated on a 'fag packet' from the above test information.
Car jacks will take an enormous amount of abuse, they must be very over engineered to take the unknown weight (not the curb side weight of the car) given that the car may well be loaded and full of fuel and occupants, I know common sense would say take the loads out of the car but do you think that someone in a panic with kids in the car will think of that? I bet the car manufacturers engineers have though.
Now it looks like 6 legs with pads are needed and some beams to spread the load under the track/table, pad size to be determined from above simple clacs.
Ballscrews are definitely not the way to go.
Edited By Barrie Lever on 30/05/2019 10:56:54
|Thread: Sherline owners|
I nearly bought some Sherline gear a few years ago, I kept on getting beaten to them though (second hand).
I have visited the factory in California and it is very impressive what they do, have you seen what the likes of Jerry Kieffer produce on their Sherlines?
If I did not have a Unimat 3 as my small benchtop lathe then it would be a Sherline as they are a lovely piece of kit.
|Thread: Are these spot drills?|
You are correct about the 90 deg spot drills in industry.
I was told about the bigger angle and to follow in with the smaller angle by a Hoffmann Garant tooling rep as I buy tools from them, in my case the spot drill is 150 deg and the actual drill is 142 deg going into 316L stainless. I don't do a large spot drill cone like you have described rather something that is like a large centre pop mark, the second drill does follow very nicely.
|Thread: Chernobyl TV Series|
A completely horrible industrial accident and as far as I remember it was completely avoidable.
I will not watch the series as I have seen how horrifc the incident was for those who tried to contain it in the days after the explosion, same way as I never watch anything to do with the concentration camps, seeing it once is enough to remember it for the rest of your life.
Live and learn and don't make the same mistake twice.
|Thread: Are these spot drills?|
I was under the impression that the idea of a spotting drill was to have a larger angle than the drill that would be following it, so a 130 deg spot drill for 118 deg drill, 150 deg spot for 142 deg etc.
This is so as that the shallower cone left from the higher angle gives a conical spot target that the second drill picks up on.
If the spot drill is lesser angle than the second drill, then the second drill picks up on the circumference of the cone left from spotting, which can make the second drill walk and vibrate a little.
I was taught to use a centre drill prior to the main drill, I now realise that this was incorrect for the reasons described above.
|Thread: What to buy|
No apology needed, I do not take that sort of thing badly, however I do like a bit of friendly robust banter and you are a good sparing partner in that.
When I said sight unseen, I meant in the flesh, I had seen photo's on Ebay to form a judgement upon. Funny thing about photo's is that just about everything looks quite good in a photo as an overall impression, this is particulary so of something like classic motorbikes, however get up close and it is often another story.
What you can see in photo's is specific damage or similar defects, you also get an overall picture of how the person keeps and presents things and this can help in the persue or reject criteria.
I could only talk to you about my red traffic light story out of the watchful glare of the internet and prefreably over a pint but it is a cracking story !!
I bought everyone of the Compact 5's sight unseen, never had a problem, and I am fussy.
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