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Member postings for RMA

Here is a list of all the postings RMA has made in our forums. Click on a thread name to jump to the thread.

Thread: Mains outlets with USB sockets - safety?
09/07/2019 11:40:11

I doubt it, but a Fireman friend has told me that several fires are caused by everyday kitchen appliances left plugged in, typically electric kettles!

I tend to switch off anything not needed at night to eliminate the fire risk more than anything else, although I'm told the annual cost for electricity when things are left on standby, adds up!

09/07/2019 11:36:20
Posted by Neil Wyatt on 08/07/2019 22:15:23:

Does every safety obsessive here unplug their computer at night then?

And switch off the central heating?

And the microwave?

And the cooker?

And the alarm clock radio.

And the satellite box?

And the DECT phone?

The only 24/7 equipment I have disconnected was the ancient mains powered doorbell which I felt got uncomfortably warm for something in a cupboard.

And if you don't the total consumption will be a fraction of an old filament bulb left on all night.

Thread: Curious
09/07/2019 11:33:06
Posted by Clive India on 07/07/2019 11:22:15:

However, I have consumed the widget stuff when abroad when the only alternative was San Miguel! Both taste like dead rats, but the widget stuff less so.wink

I spend a lot of time in Spain and have sampled San Miguel on more than once and to my 'non expert' knowledge, thought it was Lager rather than beer. I've never tasted dead rats, so I'll take you're word for it haha!

Thread: Phillips vs Pozidrive and portable drills
05/07/2019 10:17:08

Typical example of non standardization! Having put thousands of these things in, I always find Posidrive to be the best.....and then comes along a Philips head!! Have to search and change the bit, and they never seem to bite as well.

Single slot still around, and what a pain they are. Torx head Brilliant but not that common although I have put a few thousand of those in.

Thread: More Workshop space, shall I or not..?
28/06/2019 23:13:50
Posted by Tim Stevens on 28/06/2019 15:18:42:

Watch out - junk expands to fill the space available ...

Tim

Strange word junk . Normally refers to trash; waste, or things of no value. The lady of the house will often refer to the contents of the workshop as junk, whereas we know better. We know that those pieces of metal and wood that's been shifted around for donkeys years will come in handy one day, and you'll definitely know that the day after you've binned it!

Thread: Do you clean your workshop at the end of the day?
28/06/2019 15:54:37

I am in Spain and taking a drink break from loading the car ready to drive back tomorrow. Currently it's over 40 in the shade, and it must be well over 50 at the garage door, and I'm melting. Sky news tell me part of my route home is on fire....great, that'll be fun then!

I can't help wishing I was in my cool workshop back in England...........yes, tidying up!!!

Nah, won't get done will it?

28/06/2019 13:22:07
Posted by Blue Heeler on 28/06/2019 10:19:49:

Do you clean your workshop at the end of the day so when you go in there next its all in order?

Or are you up to your elbows in tools and stuff and spend a lot of time looking for what your after

Looking round my workshop, it's pretty apparent that my day's don't end!! I'm always amazed when I see pics of tidy workshops and clean machines on here! How on earth do you do it?

Thread: Myford Super 7 Top Slide Base - Alternatives?
26/06/2019 09:11:52

I have no idea how this slide works or what loads the broken piece has to take, or how accurate the piece has to be, but I've had great success using JB Weld to put broken pieces of metal back together. Always best to repair if you can, hope you get it sorted soon.

Thread: Replacing Warco WM16 spindle bearings
26/06/2019 09:04:18
Posted by Hopper on 26/06/2019 00:22:38:

Taper roller bearings are generally considered the bearing for the job. What are the "upgraded" bearings you refer to?

It is well worth spending the money to buy good quality bearings. SKF brand are reliably good. Take a look through their online catalogue to see what they offer. They do some higher-precision lines in certain sizes but whether they are worth the extra money for this application I could not say.

Agree. If the bearings aren't up to the job, what chance have you got with accuracy and life span? It's a bit like putting cheap tyres on a performance car. Incidentally, what make are the original bearings? I would always opt for Timken, but I would say that wouldn't I.

Thread: Possible New Internet Scam to be Aware of.
22/06/2019 19:55:01

Bank security from my experience is pretty good. The Bank will pay should any hackers take money from my accounts, so I do everything online....have done for year's here and abroad.

I did encounter a problem at the beginning of the month when filling up with Diesel in France on my way to Spain. I went to a well known superstore's filling station and, as is now common in France, paid at the pump (no choice) with my credit card. Got back into the car and headed off when my phone went telling me I had a text which I was expecting because my Bank always lets me know when my card has been used. However, two more text messages came through, and when I stopped for a break some time later I checked them. To my alarm I had a message about the correct amount plus two more for 130€ each taken within minutes of each other!

I had to wait until I got to Spain to check my balance online and only the correct payment showed. I contacted the Bank and they said their automatic fraud software had detected the fraud and stopped payment straight away.

I am reassured that they work in my best interest...........I hope I haven't tempted fate now!!

21/06/2019 12:43:02

Yep, get these all the time! Strangely though they seem to arrive just after the date I pay......everyone seems to be watching everyone. I'm going the VPN route.

Always hover the curser over the name and you'll see the senders email address. It's usually random letters or numbers after the @. Mark as phishing and then double delete.

Thread: Easy Button Die Storage Solution
20/06/2019 10:16:25

Too critical on here, it obviously works and he is sharing ideas......that's what a forum is about. I have made something similar but I used thick MDF fitted into a plywood case. It houses taps; dies, and tapping drill and it's easy to find what I'm looking for, essential these days when I seem to spend half my time looking for the tool I've just used!!

Never had any problems, but my workshop is indoors. Other cases I have made in a similar fashion house squares etc.but I lined those withe green base with a little oil on.

Thread: water supply
18/06/2019 08:12:45

I don't think you've upset anyone, forums are for discussions and debate (like the ones we have in our clubhouse, although they can get a bit heated). Keep posting, there are some very interesting topics on here as well the wealth of technical knowledge from members around the world.

We all moan about the internet at times, but it has created many 'families' for various activities and hobbies.

Thread: spindle bearings
17/06/2019 17:34:24
Posted by Ketan Swali on 17/06/2019 12:31:54:
Posted by RMA on 17/06/2019 08:36:45:

Yes I would generally agree with that, but the OP suggested two options including changing to tapers. Personally, if I was going to use the machine a lot and hard, I would change to tapers if the castings allowed for the mod.

Cost is another concern the OP has, but again it depends what the machine will be used for.

I understand, and after re-reading the OP, I also get where you are coming from. In that respect, you are right.

So, I need to clarify my earlier position. This is my opinion... Most machine designers have taken various factors into consideration, and reached a balance/compromise for the type of bearings they have used in the spindle of their machine. For this reason, I have gone along the line of changing like for like... where possible.

So, if one still wants to change the type of bearings which are in their spindle assembly, here are some of the points to consider...

For example, changing from general 'ball raced bearings' to 'angular contact (ball raced) bearings, will allow for a good improvement in accuracy. Similarly, going from angular contact bearings to Taper roller bearings will give a further improvement in accuracy.

The pre-load on bearings is one of the factors. All other things being equal, if you change from ball raced bearings to angular contact bearings, the max speed will reduce based on contact angle and pre-load, and the max speed will further reduce if you change to taper roller bearings, mainly due to the surface area of the rollers in contact with the inner ring, and how much pre-load is applied.

Another factor is the electronics. If changing from one type of bearing to another, one needs to consider the following: With more pre-load facility available for Angular contact bearings, the motor 'may' have to work harder to turn the spindle, and it may have to work even harder for taper roller bearings. The question then arises, is the motor up to it?, is the belt drive or gear train up to it? So, one has to consider the balance of pre-load to motor load to forces on the gear train/belt drive, to get the accuracy required. Are the electronics up to it?

Another factor is heat generation.. are the new bearings lubricated correctly with the right type of grease?, and is the quantity of grease put inside the bearings correct (usually roughly less than 20% of internal volume of the bearing). If this is correct, how will the pre-load on such assembly behave in terms of heat generation, if you change from Angular Contact bearings to taper roller bearings (TRB), when running the spindle at 6000 rpm?, combined with the load on the motor... correct running in procedure - short term high heat generation before settlement, etc...

In our experience, going from ball raced bearings to angular contact bearings is a reasonable change one may wish to consider. However, going from ball raced bearings, or angular contact ball raced bearings to TRB, especially where higher speeds are involved, is something one should be more careful about, keeping in mind the points raised above. For manual hobby machines upto 3000 rpm, this may be a small issue.... subject to control board overload protection/or not.

There are various other points, relating to the cutting tools used before and after such changes, and their effects on the tool - HSS or Carbide (which need higher speeds). As carbide seems to be a new fashion thing, reduction in speed could have deferent effects on the cutter, as well as the results.

So, really up to the person making the change to consider many factors before making a change.

You also made a good point with reference to TRB: 'if the castings allowed for the mod' and/or the inner spindle assembly allowed for it.

These are just observations ( I am not trying to create an argument). teeth 2

Ketan at ARC.

Yep, agree, especially about the regard to lubrication. I'm going back many year's now, but I had to investigate several bearing failures and most were due to incorrect lubrication. A lot of technicians/mechanics thought that if the bearing and cavity wasn't full of grease, it wasn't lubricated properly. Fact was the bearings churn the grease and increase the temperature so much that failure is inevitable.

Thread: water supply
17/06/2019 17:22:08
Posted by SillyOldDuffer on 17/06/2019 10:50:24:

OMG, not long ago I found myself defending Accountants, and now it's Economists! What next, Estate Agents?

Sad to see Economists being rubbished on the forum when the two who made the world rich were both British. Adam Smith invented Free Trade and the idea of Growth (which generates wealth), and John Maynard Keynes realised that money borrowed from the future could fix hard problems today. Despite cracks, both ideas have been extremely successful.

Economics is what I'd call a semi-science; although there are underlying rules that can be exploited, irrational human behaviour intrudes - everything between mob panic and financial Unicorns. What happens in the economy is due to a mix of rational and irrational thought. We are all emotional about money.

The economist's job is to discourage financial foolishness by improving decision making. What they do is imperfect and they get it wrong sometimes, or - more likely - unpopular advice is watered down. However, when it comes to the wealth of nations, an economist is a far better bet than man-in-pub. At least economists understand the basics. Financial management based on ignorance, prejudice, misunderstandings, or narrow personal experience is high-risk.

Putting it another way, criticism is cheap and easy. Any fool can do it, and - when irritated - people lash out. But, like any badly made cheap-tat, it's best if the quality of ideas meet minimum standards. Good criticisms come with with a viable alternative . You need to say 'This is what's wrong, here's a sensible alternative.' Then others can test the 'sensible alternative' to confirm it holds water and isn't flawed, or is just empty political vapouring.

I understand the frustration, but replacing economists, or any other kind of specialist, with unqualified blokes who happen to agree with you is a good way of making things worse.

Not everyone agrees with me. The philosopher Thomas Carlyle described economics as a 'Dismal Science' but he was a Scot with stomach ulcers...

Dave

It's arguable whether those economic models have been a success. Financial management is one thing, not many businesses or households would survive long without it, but crystal ball gazing is another. That Canadian chap who runs the Bank of England for instance consistently gets things wrong, unfortunately too many people making decisions based on his utterings.

The thing with this argument is a bit like economists, no one is right!

17/06/2019 09:50:30

Nice assumption.

Interesting diversion into Police and crime. Correct me if I'm wrong, but I don't think there was a Crown Prosecution Service then. I also think respect was common, and the court system worked in favour of the victim!!

The current Police force are now in a complete 'no win' situation! Complete lack of respect from most of the scum they have to deal with; not much back up from the CPS, and courts which deal out a 'slap on the wrist'! Police involvement is now filmed on phones and put on the internet, so they have to think through any consequencies of their action before they do anything

How can the Police cope with the pressure they are under?

Thread: spindle bearings
17/06/2019 08:36:45

Yes I would generally agree with that, but the OP suggested two options including changing to tapers. Personally, if I was going to use the machine a lot and hard, I would change to tapers if the castings allowed for the mod.

Cost is another concern the OP has, but again it depends what the machine will be used for.

Thread: water supply
17/06/2019 07:33:36

Many year's ago when I was on one of my management courses, Economics was on the syllabus and was considered a complete waste of time. There was a saying " If you laid all the Economists in the world end to end, you'd never reach a conclusion". Unfortunately they get taken notice of, and important decisions are made on the basis of the the drivel they come up with.

Unfortunately Algorithms are set to take their place and the world and our lives will be determined by them. This is already happening in the insurance industry, and many others are set to follow.

16/06/2019 15:13:18

Totally agree. It should be in the Building regs just the same as smoke detectors etc. Common sense really but I'm afraid common sense isn't so common these days!

16/06/2019 14:43:20
Posted by SillyOldDuffer on 16/06/2019 13:33:44:
Posted by Mike Poole on 16/06/2019 10:43:12:

Luckily I live at the source end of the Thames and so get first use, London are pretty much last to use the Thames watersmiley

Mike

Thames Water (the supplier, not the river) is jointly owned by the Australians and Chinese, both evil regimes intent on World Domination. I can no longer sit back and allow Communist infiltration, Communist indoctrination, Communist subversion, and the international Communist conspiracy to sap and impurify all of our precious bodily fluids.

Dr Strangelove apart, I believe Thames Water are still the UK's worst offender in terms of unfixed leaks. They prefer to pay shareholder dividends rather than mend pipes. UK Government doesn't exactly take a hard-line:

'We require the water companies to fix leaks, as long as the cost of doing so is less than the cost of not fixing the leak.'

So that's all right then.

Dave

Yes, I'm afraid we are reaping where Thatcher sowed. Can anyone on here tell me which companies are still totally British owned? Shouldn't take long

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