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Member postings for peak4

Here is a list of all the postings peak4 has made in our forums. Click on a thread name to jump to the thread.

Thread: Finally got the milling machine home.
14/03/2020 22:02:06
Posted by old mart on 14/03/2020 20:44:06:....

I notice that you have a Clarkson Autolock for the mill. ...........

Edited By old mart on 14/03/2020 20:53:16

It looks to me like Steve has a Clarkson S type chuck.
My MT2 one doesn't have the extra left hand threaded collar.

Also it's not suitable for plain shanked cutters, requiring threaded ones of the Clarkson style.

The C type (still a Clarkson Autolock) has a separate collar into which the collet fits, and also has the left hand nut at the top.
Mine works fine with plain shanked cutters, as the extra internal collar closes the tines of the collet.

On the S type, the cutter's shank needs to project backwards through the threaded portion and engage on the pointed centre to shove the collet forwards far enough for the nut to close it.

The C type has two little pegs on the back of each collet to drive it, whereas Steve's S type has two flats.

The similar Titanic, has a half cutout on the rear to provide the drive, but again, can't cope with plain cutters.

Fortunately, it looks like Steve also has some ER collets so he can use plain cutters OK; all carbide cutters I've seen have had plain shanks.

Bill

Thread: 15,000 for a Bridgeport!
14/03/2020 21:40:12

It looks like many/most of his model machines are in the auction, but mainly with reserves of £2-3000.

Whilst the Bridgeport is more complex, I wonder if there is a typo, of the auctioneers already have had contact with some interested parties.

Bill

Thread: Chuck
14/03/2020 21:33:11

I've even done that on the Myford, using a Simat chuck, but I did at least use all the jaws on the big one.

Bill

Thread: Coronavirus
14/03/2020 21:26:41
Posted by Martin of Wick on 14/03/2020 20:43:26:
Posted by Plasma on 14/03/2020 19:09:45:

Am I missing something?

If normal seasonal flu kills 8000 people in the uk and this covid is not much worse why are we taking such huge measures to control it?

because it is 10 times more potent than the average flu and very serious for 15% of cases

..................

Edited By Martin of Wick on 14/03/2020 20:44:35

Do a few quick back of the envelope calculations;

Currently UK gov are suggesting "Herd Immunity" if 60% of the population get infected, though that's a figure widely disputed by a number of other experts, who suggest a minimum of 70-80% and some say even higher.

Obviously there's no way of knowing currently if that percentage of the population are likely to get infected, so I'm not trying to be over-dramatic here, and just providing a possible illustration, which I seriously hope is wrong, but why even publicise this number as part of the strategy unless it has relavence?

Taking best case scenario on the 60% estimate/requirement with a UK population of 66 million approx.
60% of 66 million comes out at 39,600,000 infections.
Death rate is estimated at 1-2%, so again, taking best case, that leaves 396,000 predicted deaths, in order to achieve "Herd Immunity".
It sounds like a potentially dangerous strategy if it all goes per shaped.

From Italy, it seems that, of the small percentage who do require Critical Care & ICU intervention, of those who are on ventilators and receiving full support, there is about a 40% death rate for over 60s ( I assume that is all over 60s, so includes 70s, 80s etc)
Italy has about twice as many high dependency/ICU beds as us, and I think ours are already 80% occupied.
I'll stand to be corrected, but I think we have a little over 4 high dependency beds + 2 ICU beds per capita.
Italy has sent some military personnel into medical ventilator factories, to assist boosting production, and China has sent a large aircraft full of medics an 1000 extra ventilators to Italy, along with other medical supplies.

Some estimates suggest we are a couple of weeks behind Italy, as regards infection rates, though clearly I don't know the accuracy of that.

Here even hand sanitiser is virtually unavailable, Gov is woeful, and folks are stockpiling toilet rolls.

Without straying into politics on an engineering forum, we have no idea how many of the population are currently infected, as the advice at the moment is;

"You do not need to contact 111 to tell them you're staying at home.
Testing for coronavirus is not needed if you're staying at home"


So essentially, no-one knows who's staying at home, and of those who are, no-one knows how many are infected.

I'd best leave it there before I get grumpy and stray into politics

Bill

Edited By peak4 on 14/03/2020 21:30:45

Thread: Finally got the milling machine home.
13/03/2020 12:47:07
Posted by KWIL on 13/03/2020 11:33:11:

Bill make a "spacer" to sit on the table, of such a height that you can use the table to lift the head into the correct position?

........

Cheers, that's what I did in the end, with a large block of wood. I probably should fabricate a clamp to make it all a bit safer.

Bill

Thread: A free ride to hospital
13/03/2020 10:56:32

Folks, don't forget, that when some folks talk about "grinding" aluminium or steel, not everyone is thinking of a bench grinder with a wheel.
Knife makers for instance often use a 2"x72" (or 48" belt "grinder"

Other engineers may consider this as a linisher or belt sander.

When I was writing articles some years ago for a specialist motorsport safety newsletter, I did mention a particular accident where someone using a linisher had ended up with burnt fingers due to some sort of exothermic reaction when he's swapped from "grinding" aluminium to steel without cleaning the machine first.

I vaguely remember reading about it originally in the model engineering press, but this is some 20+ years ago.

Bill

Thread: Finally got the milling machine home.
13/03/2020 10:45:58
Posted by not done it yet on 13/03/2020 10:36:33:

Good British Engineering. Tom Senior was on my original list, but I really wanted both a vertical and horizontal mills. The Centec fitted that bill, in one machine, perfectly for me.

Have you come up with a way to lift the vertical head into place without getting a hernia.
I used the horizontal arbour for a job last week for the first time in a couple of years; I then promptly realised how much my current viral infection has sapped my strength, as it was all I could manage to put the head back in place.

I'm not really in a position to make a movable crane due to the workshop layout, though I might be able to come up with something attached to the trolley on which the mill resides.

Best solution would be a long riser block, but no longer available from any of the previous sources, so I may have to come up with a way to machine one on the Centec itself.

Bill

13/03/2020 01:08:41

My Centec has a captive drawbar; I don't know about your new toy.
If it is similar, then the bottom end of the drawbar will preclude the use of a plain shanked drill chuck arbor.

I just set up in the lathe and drilled the ends of my arbors and tapped 3/8" BSW. (Your's of course my be a different thread.)

Bill

Thread: Vaccum for a milling machine.
11/03/2020 23:48:01
Posted by Steviegtr on 11/03/2020 22:40:03:

Oh my god a leaf blower. It's not a 32cc 2 stroke is it. If the dust don't kill you the 2 stroke will. laugh

Steve.

No I use the electric one indoors, the 2 stroke outdoors.
Perhaps surprisingly, it's pretty much dust free at the operator's end, provided I open the window at the end of the garage.
It actually gets used pretty regularly inside the garage for its intended purpose.
I prefer to work with the main doors open, and there's some strange eddy currents in the wind round our house, meaning that the garage fills with dead leaves.

Bill

Thread: Nice Myford on ebay
11/03/2020 23:42:52
Posted by Emgee on 11/03/2020 22:50:41:

Nice looking machine but I fail to understand why anyone would fit a VFD controller in such a position, unless they only have a right arm.

Emgee

 

I bought a Warco 720 S7 clone a couple of years ago.
That's exactly how it was fitted to mine.
I find it fine to use, particularly as the Warco stand has a cupboard on the left hand side.

The price is a bit scary though @ £490 with the motor. It's part of the reason I bought the lathe to replace my old changewheel S7, pre power x feed.
The Warco has gearbox and power x feed, as well as the Newton Tesla drive package, certainly not as well finished in the details as the genuine article, but it does OK for me and came for £1200.

Edited By peak4 on 11/03/2020 23:43:03

Thread: Vaccum for a milling machine.
11/03/2020 22:32:34
Posted by Clive Hartland on 11/03/2020 22:19:24:

Good job you dont have a saw bench and planer as the dust gets everywhere.

Well I've got a universal saw/planer/thicknesser/slotter.

I cover the lathe/mill/shaper etc with old nylon sheers (remember them) and use the vac on the machine to try and catch most of the dust whilst it's working.
Next job is to put weights on anything light, open the garage doors and break out the leaf blower.
It works a treat, including dislodging things I lost months ago.

Bill

Thread: Nice Myford on ebay
11/03/2020 20:36:44

Steve, Your link is broken, try This One

Bill

Thread: Vaccum for a milling machine.
11/03/2020 20:33:05

I've just been milling a cast iron slab to make a bevel straight edge.
I can assure you that my old Aquavac (original) has seen plenty of use, though not plumbed into the mill.

Less use near the lathe as the curly swarf clogs the vacuum tube, but well worth having for general workshop use.

Bill

Edited By peak4 on 11/03/2020 20:40:56

Thread: Coronavirus
11/03/2020 19:34:13
Posted by Doubletop on 11/03/2020 18:59:29:

The swings from "She'll be right" to "We're all doomed" seem to be coming together.From a recognised expert. **LINK**

Pete

Seems a good and not too sensationalist video.
Annoyingly it cuts off at a most unfortunate moment; however if you watch it on Youtube, and go to the presenter's channel, there are subsequent clips which are also worth viewing.

Bill

Thread: S7 Tail stock
10/03/2020 11:57:03

Is it actually low, or pointing downwards due to wear?

A possible suggestion if it's horizontal, but low, would be to split top from base and insert lengths of feeler gauge/shimstock. Starrett do long lengths of feeler gauge, available off ebay at a reasonable price.

If pointing downwards, then scrape or re-machine and then make up the lost height as above.

Bill

Thread: Led id
09/03/2020 23:51:23

Ian, Having just read This Link, I wonder if your UV ones have built in lenses.
Assuming the replacement board also has glass lens ended white LEDs, it might explain the price of the replacement board; check out the prices on the link.

Save the UV ones; I wonder if they might be good for activating UV cure glues and resins.

Bill

09/03/2020 13:03:37

Ian, personally I've never seen any LEDs in a TO18 either; my link just came up from a Google search.
No idea of the reason for it, other than maybe filled with a thermally conductive paste to act as a heatsink.

I just used normal white LEDs when I knocked up a ring light for the camera, but when I made a moth attracting light, I used a combination of white, green, blue and UV high powered (5W) ones. These need to be mounted on a heatsink and powered from a constant current source, tailored to the LED's wattage, so a different ballgame.
Each colour has different voltage requirements, so I powered them in series pairs, each pair with their own PSU, all four PSUs wired in parallel to run off a 12v battery.

Bill

09/03/2020 12:36:30

They look similar in size to THESE, now shown as out of stock, but the spec is there.
The download sheet points to MARL Optosource which is a UK company.

Your final choice of LEDs might come down to what driver/PSU you have fitted; some of the higher powered ones use a constant current source.
You might find that a voltage stabilised PSU for one replacement with conventional lower powered LEDs is sufficient, since you have 20 of them.
Are they all wired in parallel, or do you have a number of parallel circuits, each composed of several LEDs in series?

I'm guessing you will need to measure the voltage output from the driver under load, and also the max current supplied, and then select replacements as appropriate, bearing in mind the limits of your power supply.
Lower powered "normal" LEDs are likely to work off a constant voltage source.
Bowood Electronics might be worth contacting, and they are reasonably local.

Bill

Thread: warco lathes.
07/03/2020 16:02:05
Posted by roy williams 3 on 07/03/2020 15:56:51:

hi can some one tell me where the carriage lock is please? regards

In my case a vertical M8 bolt on the top of the green casting, hiding below the top slide when it's set parallel to the axis of the lathe.

Bill

Thread: Printers
07/03/2020 12:44:15

Larry, after a while, the rubber rollers, or pickup quadrant gets glazed over and looses friction.

You could try cleaning with IPA, but don't overdo it as that in itself can dry out the rollers and cause future problems.
There are proprietary cleaners and rubber rejuvenators on the market specifically designed for the job.

I use Electrolube Rubber Roller Restorer on a lint free cloth
A little goes a long way, and one tin should last you a lifetime.

Bill

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