Member postings for AdrianR

Hi Bob,

I did not know what is special about it, but I just did some googling. Seems to be a mineral oil with a lot of anti-wear zinc and not much detergent, which makes sense. I see your point about only 5L containers, you could try motorcycle repair shops, they might sell smaller quantities, or if you have a garage that does engine rebuilds go see if you can blag a mug full.

I also found it is called break-in oil if that helps.

Of course, every new car will have it in, you could always "borrow" some out of next doors new car

I too have found junior hacksaw blades to be soft recently, but I put it down to buying DIY store blades.

A blade I have had for at least 30 years and probably came from R.S. still cuts even if a little dull. The DIY store ones are lucky to survive the first pass of the blade. I have bought Eclipse blades and they are better, still not as good as I remember them to be.

But how much of that is a rosy memory of days gone past?

I needed to dig out the information about Diamond Dowel Pins to give to someone and thought I would pop it on here too as they are quite useful.

They are used to allow alignment between parts where the dowel holes may not be perfectly aligned. You use one normal pin and one diamond pin.

Rather than give a manufacturer link, just google "diamond dowel pins" if you are interested.

A useful Idea to tuck away at the back of your memory for that difficult job. And if needs must they can be knocked up on a grinder.

Last year I wrote an article for MEW on installing a SX3 DRO, trouble is I can't find any record of sending it. Ho Hum, just asked Neil if I did.

I used the mDRO universal kit, but found most of the mountings were far too large and ended up making my own. I put the Z-axis inside the column. Having it all apart is also a good excuse to clean out the grit from all the places it should not be. X & Y I made sloping to reduce swarf build up.

I found the details of the https://www.ebay.co.uk/itm/New-Distressed-Mild-Steel-Bar-Gun-Metal-Black-1-Meter-1000mm-Lengths-/113780630432?var=&hash=item6060f2a4c1 rather amusing.

"We also supply the same shapes and sizes finished in 'Rusty Red', 'Antique Bronze' & 'Aged Copper' (see images 10,11,12) Please see our other listings. "

Sounds just like the range I have in my workshop

I don't quite understand why you think it would go to half 12v. The peak voltage on the signal cable would be dependant on the capacitance of the cable and how fast the voltages rise on the 5V and 12V. The examples I have seen on Google give capacitances of 100pF/m.

I assume the signalling you are talking about is manual on/off, not fast data signalling. I would connect a capacitor e.g 470nF on the signal wire. This would not only suppress any transients caused by the switch on, but also suppress any mains hum on the signal wire.

Adrian

*** I see Joseph beat me to it with a much better explanation

Edited By AdrianR on 11/09/2020 08:28:42

Capacitors as voltage droppers work great at 50Hz, but are a terrible idea if there are harmonics or spikes.

I had a fancy Philips coffee machine on my canal boat, well that was till I switched from shore power to inverter. A bang and cloud of acrid smoke reminded me that I had left it plugged in.

The inverter was a quasi sine wave, the higher harmonics of the square steps in voltage went through the voltage dropping capacitor and fried the electronics.

It was still under guarantee so I took it back, a few weeks later I got a call from Philips asking how it happened. I was so impressed they were following it up I told them how it happened.

Adrian

Paypal allows you to connect a 2FA app in place of the PSD2 OTP text. You can either have the app on your phone, or you can get apps for your PC.

I used to use a Chrome extension for 2FA before I had a smartphone

**LINK**

Adrian.

You can get vibrating wrist bands that can alert for fire alarms and doorbells, but of course, that means she would have to wear it and recharge it. Which if she is anything like my mother was would not happen.

Adrian

I am not a Mac user but at work, they used Time Machine which Mac's come with.

How embarrassing, having my counterbore quoted. Don't make one the same as mine, it has a numpty mistake, it runs backwards. What is worse I sharpened it three times trying to make it cut, before I realised my mistake.

Once the reverse button is pressed it cuts a perfect counterbore, lot cheaper than buying a set too.

Adrian

Today I made an M3 counterbore, came out great, cuts wonderfully. Except for one small rooky mistake.

I would say it would be very unlikely to not affect its strength. The 8.8 specification is for medium carbon steel, quenched and tempered.

You also don't say if the red heat is under load or is how you are operating it.

Personally I would bin it. If it is for something critical you cant trust it, and if it is in your bits box you may end up using it for something critical. An accident waiting to happen.

Adrian.

Well, just to add to the confusion, our transatlantic cousins apparently call second taps plug and plug taps bottoming. I wonder how many plug taps we buy are really second taps.

Of to the grinder I go.

Adrian

Hi,

I need to tap an M3 thread for 4.5mm in a 5.5mm deep hole. For this I thought I would need a plug tap, So I bought one, and I was surprised that it has a point at the end.

I was expecting a plug tap to have a square end. When buying it I had a choice of taper, second and plug, to me this looks like second. Am I wrong in expecting a square end?

Thanks

Adrian

I dont think it means parachute but chute as in coal etc.

I dont speak german, but if you google "gefälle steigung" and then translate the page you get this **LINK**

Which is a site that calculates the same things as the Nivellator

I have found that some people can feel these currents others can't. You are one of the (un)lucky ones who can. The picture looks like it is an original PSU so design-wise should be fine, but four years of unknown abuse could cause a little extra leakage. The number of times I have pulled a blistering hot PSU out from the sofa cushions, darn kids!

If you have the funds, for peace of mind pick up a good quality replacement PSU, Looks like you can pick one up for about £20. Avoid the generic bargain bucket PSUs, they are built down to a price and often are just the safe side of lethal. But any 20V 3.25A (probably 3A too) will work as long as the plug polarity and type is correct. The little diagram after the 3.25A shows the + is the pin and the - is the ring.

Oh incidentally as I found out after finding a server I was working on gave me the trembling feeling. The equipment can be perfectly earthed, it can be the building that floating.  

Adrian

Edited By AdrianR on 15/07/2020 12:42:02

My two favourite methods to calculate Pi are using random numbers https://www.youtube.com/watch?v=RZBhSi_PwHU  and using a balance beam **LINK**

Hopefully promotion of his book and patron page dont fall foul of the new rules.

Adrian

Edited By AdrianR on 05/07/2020 18:06:36

Robin,

The chipset used in the senors is designed to run from battery e.g. in digital callipers. For low power consumption, you need to use lower voltages and smaller components in the ICs.

Examples of low voltages for power saving are the voltage on phone CPUs is below 1V, the latest ones about 0.7V and PCs are about 1.3V.

Adrian

While twiddling my knob thinking of other pastimes two things occurred to me;

1. I have not got a clue how fast to twiddle to get the optimal feed.
2. Twiddling RPM is slow and in the range of musical Beats Per Minute.

A quick trip to the Android Play Store and I downloaded the free app "Simple Metronome" Which incidentally has a handy flash the display on the beat feature.

So now If I want 140mm/min with my 2mm pitch lead screw I set the BPM to 70 and twiddle away in time with the beat.

For really slow feeds it is worth having two beats to the twiddle.

Next on the world domination list is make a MIDI-controlled mill.

Adrian