Member postings for not done it yet

I have tried heat when the tube very cold but its stuck fast.

I've no real idea, but the above seems 'back to front'.

Better to heat the steel then cool the ally to break any joint between them? Coeff's of expansion being different?

Edited By not done it yet on 04/05/2017 08:23:03

Is anyone following along and making this project now that "Clickspring" is well into his construction with videos, etc?

Far too complex and precise for me, but I am now following this - another of his superb series of videos - in total awe of his skills.

Naughty though, as it has been demonstrated, part of the reason for the dieselgate problem was, or still is, the way the americans arrange their compliance comparisons. They do it on amount per unit volume of fuel, not amount per unit distance travelled.

That puts economic vehicles at a distinct disadvantage over the typical 'gas guzzler' vehicles manufactured in the US. Now, had VW only fixed the tests for export cars (to the US) I might have had some sympathy for the company!

Buy or make a

broach?

I would still take my chances with a few smuts every time, against more Chernobyl's,

Especially if they are situated downwind of everywhere! Now, what are our prevailing winds? SW by any chance?Apparently not tsunami proof either? Not happened lately but about 2-400?years ago, there may have been a bit of a 'surge' along the SW coast due to part of an island (or Ireland)

falling into the sea somewhere, after a rather large earthquake?

Check out: https://en.m.wikipedia.org/wiki/Tsunamis_affecting_the_British_Isles

It does happen ..... Only needs to happen once ....

Which is the best diameter for an ML7 Leadscrew.

It does rather beg the question of why they changed in the first place?

He won't need a multi fit arbor. He's only buying one saw.

I would guess that the biggest your machine will accommodate after consideration of what you really expect to cut, or spend.

Holders are available from the sellers on the right side of your screen. You pays your money and get the quality you pay for.

A correction or a more rational cost of electricity generated by solar roof systems.

Agreed, those early adopters are making a reasonable return on their investment. They are not making many megawatt hours of energy and the subsidies were to pay for those very expensive systems back then (£15,000 or more was typical at the time).

Current adopters receive a far lower tarrif for their production. Currently a tad over £40 per megwatt hour (yes, far less than £500!) There are far fewer early adopters, than later ones on lower tariffs. Secondly the FITS now state "up to 20 years", not in excess of two decades.

Consider, too, that around 5% of grid transmission energy is lost. Yes, a simple total loss. Local generation not only saves this transmission loss, but also reduces the need for transmission upgrades - a considerable capital saving.

Note also that the power retailers will be vey satisfied with the pricing arrangements for deemed export. They will be purchasing rather more than the amount they are paying for and will be selling on that extra bit for a healthy profit! I am sure that they would soon change to metered export payments if it was actually costing them money!

With regard to wind tariffs, these producers are paying out millions to install these units and they expect some return for their investment - that is business! Off-shore costs were horrendous but are now reducing rapidly. Without support, the technology would not progress anywhere as quickly a it might.

The 4kW solar limit (actually 3.68kW export limit) is one of the crazy limits. Injecting more than 3.68kW back into the grid is an arbitrary figure to protect the local supply lines everywhere. Fitting 10kW of panels, but only injecting that 3.68kW is not allowed by the regulations. Now outdated and an unnecessary limitation.

I'm afraid martin 100 has expressed a rather backward understanding of the system and perhaps has a very pro nuclear wish - which many do not. The government certainly did not react to the FITS level of payments early enough, but they knew that more adopters were needed to keep the lights on at the time and in the near future.

Renewable generation costs are reducing rapidly. Soon they will be far lower than the guaranteed hinkley cost of elecricity for the subsequent 35 years. And then there will still be the horrendously huge cost of dismantling the power station (and storing the radioactive waste for millennia) and its exhausted fuel rods - all providing there is no disaster before then. They have found defects in both the reactors currently being built to this design, so not a good foreboding....

Edited By not done it yet on 27/04/2017 11:51:45

Geoff,

Making more electricity than needed is relatively easy for many, but using only that power is far more difficult. Those people off-grid generally have sufficient space for some form of wind energy capture and some are lucky enough to have a micro water turbine. They invariably have energy storage and only turn on the washing machine at opportune times. Winter solar generation is not so good in the UK.

Martin 100 may well be correct that we require 90GW to go to an all electric economy (or sustainable liquid/gaseous fuels from surplus electrical generation) for home (and industry) heating/power and transport fuel. Even EVs (electric vehicles) are currently no more energy efficient than internal combustion engined vehicles - it is only local pollution that is considered (quite rightly so for urban areas). They are only less polluting, from a CO2 emission point of view, if the battery is charged using non-fossil burning generation.

Leaky housing (from an energy perspective) could reduce the home heating requirement in the UK by a huge amount if 24 billion were spent on it - and we would not need to build Hinckley C, let alone pay the high cost of its generation for 35 years (paid by our children and their children) which could be totally avoided. (That basically means we are borrowing the building costs of hinkley C at high cost for future generations - nothing more).

Perhaps huge areas of solar generation, in arid areas closer to the equator, coupled with high voltage worldwide distribution might be a better solution than building more potential disastrously polluting nuclear power stations?

Most cetainly roll on nuclear fusion, but remember there is far more solar energy arriving every second of every day than the whole human population requires....

Do not discount mixed metric and imprial threads.

I have two virtually identical machines, made a hundred, or more, years ago. One has metric fixings and one imperial.

Parts, as in castings, were likely purchased for both from the same supplier and one was assembled on the continent while the other by a UK manufacturer.

So there is the chance that some metric assemblies for a large machine could have been bought in by the company in Yorkshire. Especially as businesses from that part of the UK were well known for buying in parts at the lowest cost, or rather 'best value for money'! is the keyway actually 5/32" or 4mm?

While the article was factual, we could have generated/imported all the energy required using the other technologies, on several other days (and likely can do for the rest of the summer months - all assuming no major breakdowns elsewhere in the electricity generation supply sector) without using any coal fired stations.

There were reasons why coal plants were needed to run in the past (synchronied start up in the case of a huge blackout) and just to keep some capacity running just in case.... but things are changing.

The previous owner had a 220v inverter wired to what appears to be the original table motor which is 3phase 400/440v. Any comments on driving a 400v motor from a 220v inverter?

It was either seriously down on power, or someone had delved into the motor to split the star connection and then connected in delta configuration. Latter would be the better option, but it may have worked adequately (just?) at the lower voltage in star connection.

Edit - Peak4 keys in faster than I do!  Gary Wooding is the member who has done it already.

Edited By not done it yet on 26/04/2017 21:28:52

Well I never, there are some closed minds around.

I did say it was good advice for a beginner to keep the half nuts closed? Yes, I do think I did!

Can you open the half nuts during the threading operation? Yes you can.

Did I explain that they need closing before returning the carriage to the start of the next cut? I think I did.

Before you get all hot and bothered about it, why not try it? It works. It can certainly help in certain circumstances. I now do it that way on occasions. So it must be simple enough.

Very sorry if some cannot manage it. Perhaps they did not have a thread dial by which to find the correct position to re-close the half nuts before returning the carriage for the next cut.

I think abom79 and doubleboost have both demonstrated how simple it is by way of demonstration on their vids, among others probably.

Whatever you do, do not open the lead-screw half-nuts under any circumstances between passes.

While good advice for a beginner, that is not entirely true. There are several vids on utoob which clearly demonstrate that the half buts can be opened - but must be closed again before reversing beyond the end of the cut.

Unnecessary for braked lathes or where plenty of undercut is available after the thread, but useful for instances where things are 'limited' in some way.

Drills are primarily designed for axial loads, so good to stop using it with a wire wheel!

At the same time, bench grinders are available cheaply (especially second hand if you know what you are doing). I can understand making a stand, but not a grinder from scratch. You may find it difficult to source 250mm diameter wheels with that speed rating. If they are, they will be a touch pricey, I would guess?

Chris,

There will almost certainly be a gear combination which will basically convert your lathe from tpi to metric pitch. It may well involve a 127 tooth gear, but may be other very close conversion ratios. You will then need to thread without the use of the thread dial as that will be inappropriate. The usual is to reverse the lathe for returning the carriage, after a cut, in order to keep the cuts superimposed.

A very generous offer, Dave.

I am sure someone will take advantage of your kind offer.

Another OAP here, but although only about 70 miles from the venue I will not be going again.

I preferred the midland venue, near Leamington/Warwick, by far. Even my wife enjoyed the day out. I am confident she would prefer the later show than Donny, so that will be where I/we may spend some money if we see anything appropriate (I find a lot of the tool/cutter sales, etc are the bottom end of the chinese supply and, while cheap, are not my choice of tool/cutter/etc - whichever show it is)

Start by asking at the local model engineering society? Sorry, no contact details known for Torquay. Local library, internet or other info services would provide a good searching point.

the head cuts fine but the problem is the adjustment. It just pants ie dial in 0.40mm and it cuts 0.60mm then the next time 0.55mm

Is backlash the problem, just as any lathe or mill settings?

Or perhaps you need a dro on it!