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Member postings for Oven Man

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

Thread: DRO Z axis
04/11/2021 09:22:24
Posted by Bo'sun on 04/11/2021 08:16:40:

Thanks for all the advice and comments,

I've pretty much decided on a Machine DRO 3 axis kit with magnetic encoders. Being magnetic, is there an issue with attracting ferrous chips? I'm guessing it's OK, because there are plenty of them out there.

You will not be disappointed, the M-DRO kits come with good instructions making installation quite straightforward. The magnetic encoders come with an aluminium cover to protect them and I have had no issues at all with any ferrous chips interfering with them. The magnetic encoders are so much neater than the optical ones and can be easily trimmed to length to make a really tidy installation. Enjoy.

Peter

Thread: UK fires up old coal power plant as gas prices soar
03/11/2021 10:45:38

I think I read somewhere that the JCB "green Hydrogen" is coming from Australia.

Interesting comment from the Environment Minister. He doesn't have a heat pump because he does not think the technology is quite there yet.

Peter

Thread: Synthetic paint thinners PT8 vs. white spirit
01/11/2021 17:15:42

+1 for the Lidl thinners, it is so relatively cheap that it can be used in quantity to make sure equipment is really clean.

Back in the 1960s I was involved in installing Hi-Fi equipment on a Royal Train being built in Sheffield for the King of Thialand. As you can imagine everything had to be the best. All the carriages were hand painted. They looked nice when they put the first coat of paint on but two days later they were rubbing it all down and putting another coat on. In the end I think it had four coats and the end result was fantastic. Creating a blemish free surface over such a large are says a lot for the abilities of the guys who created it. Some things stick in your mind for ever and the paint finish on those carriages is on of them.

Peter

Thread: DRO Z axis
31/10/2021 17:26:56

How useful is having DRO on the Z axis, when this machine has a digital depth readout for the quill?

My Champion 20V mill now has all four. When I first fitted the DRO I went for X Y and Z but to be quite honest I didn't find a great deal of use for the Z readout. As standard the mill has a digital readout for the quill but the display is not that easy to read. I have recently found a design for combining the Z axis and quill readouts so I have bought an additional read head unit and can now display the result on the main DRO display. This I find really useful and it is making good use of the Z axis display on the main screen.

Peter

Thread: Sewage dumping
25/10/2021 11:24:24
Posted by Swarf, Mostly! on 25/10/2021 10:47:12:
Posted by J Hancock on 25/10/2021 09:42:15:

It was on the BBC R4 news item this morning.

£60.000,000,000 paid out to shareholders over the years could have something to do with it.

That's sixty billion pounds.

First of all, I hold absolutely no brief for excessive and obscene capitalism. Still, we need to appreciate the realities.

I suspect that many of those shares are held, not by individuals but by insurance companies. The dividends they receive from those shares are their return on investments from which they pay both the customers who hold private pensions from them and the company pension scheme administrators for whom they manage funds. Just ponder on how your Company Pension scheme grows its funds! So, if you have a private or company pension, you could, now or later, be receiving some of that 'filthy lucre'!!

My own view is that there should be a legal category of organisation which I would term a 'Public Utility'. This would be 'not for profit' but would be required to balance short and long term expenses and, at the same time, keep prices down for the benefit of customers. It would not have share-holders. I would put the supply of the essentials of life (e.g. water, energy, communication etc.) in the hands of only such organisations. We live in an era when you can run a company that manufactures tin-openers despite being completely ignorant of how tin-openers are made - 'management' is apparently a thing in its own right, I've always wondered about that.

I fully support this 'public utility' idea that Swarf Mostly suggests. What I can't get my head around is the concept of multiple fibre systems installed up and down the road. To me a single system reaching every house and publicly owned would be a sensible approach. Just imagine what it would be like if haulage companies started building their own road network.

Peter

Thread: Halogen Oven
12/10/2021 19:37:48

I don't know about a special tool but it may well be a left hand thread.

Peter

Thread: Mill power feed using stepper motor
06/10/2021 17:47:31

img_2561.jpgimg_2523.jpgPeter

Here are some pictures of my X axis drive fitted to a Chester Champion V20 mill. It uses an Arduino for control purposes, a simple design compared to that of Speedy Builder 5 above.

Peter Bimg_2526.jpg

Thread: Crankshaft Factory
02/10/2021 18:12:52

Did it say BMW or Ford on the boxes?

Peter

Thread: Old rule divisions twelfs etc
29/09/2021 10:45:36
Posted by SillyOldDuffer on 29/09/2021 09:33:56:

Metric measure doesn't use fractions at all and no-one complains...

Dave

Just wait till USA goes metric, bet they will use fractions just to be different.wink

Peter

Thread: Saving the Planet … or is it ?
28/09/2021 09:02:00

Good to see small modular reactors are being moved up the priority list. The idea of installing them on decommissioned coal fired power plant sites with their existing infrastructure seems like a sensible idea to me. I accept that the turbines and generators will need to be replaced but the transmission lines are already in place.

Peter

Thread: Has anyone heard of this before…dopey dogs…
24/09/2021 15:55:26

Dogs can be amazing in their abilities, think sniffer dogs for drugs etc. Not sure about them being able to bite though SWA cable though.

Peter

Thread: Multimeter recommendations
24/09/2021 15:49:38
Posted by john fletcher 1 on 24/09/2021 11:54:46:

Ah, but you don't get an Earth terminal on the Aldi meter. Some thing very special about an Avo, that special smell when you open the box and then see the quality workman ship or should I say Ladies work. Should any one be really interested in AVOs and all the they made and their repairs. I suggest you go to "Vintage Radio" where there are some experts and collectors. Not me i have only got eight. John

I agree with you John, there is something special about an AVO. It's just a nice thing to pick up and hold. Mine has been through the wars a bit but it works well enough for me.

Where it really scores is looking at things like motor start and running currents. The initial start current can be quite high but of such short duration that it gets missed by a digital meter. The large scale of the AVO shows it up nicely, not neccessarily in absolute values but you can pick up trends quite easily.

With regard to fuses in digital meters my ancient Fluke 77 has a 15amp fuse specified for the 10amp range. These really do seem to be like hens teeth so I am quite happy with a 10 amp. I do worry however that a significant number of these fuses for sale on the internet are fake, It's just so easy to make something that looks exactly the same on the outside.

Peter

Thread: Annealing and tempering steel
24/09/2021 11:47:29

My experience with optical pyrometers is using the commercial ones made by companies like Land Pyrometers. They are very expensive and probably well outside the budget of most hobby people. We only tended to use them for very high temperatures when using thermocouples would be a problem. If you are annealing and tempering then you are going to be at the low end of the operating range of an optical pyrometer. Yes you can get inexpensive ones that work at temperatures close to room temperature but I don't think these would be any good for temperatures up to 600 deg C.

Emissivity is a major consideration. Without correct calibration you could be way out. Base metal thermocouples do have their own problems but on a price performance ratio they are the best choice for temperatures up to 1000 deg C anf up to 1200 deg C for short term work.

The idea of using an optical pyrometer is nice, you can aim it at the work to get its temperature rather than just measuring the overall furnace temperature. Alternatively fasten a thermocouple to the work. You can create cascade control systems so that the furnace is itself is controlled off the work thermocouple but its probably getting a bit over complicated for the sorts of heat treatment we do.

My advice is stick with thermocouples, they are cheap, reliable and easily available.

Peter

Thread: Back to Imperial
21/09/2021 09:32:15
Posted by Circlip on 21/09/2021 09:06:49:

So, back in the sixties when Ingineering was supposed to change to metric in GB., it was hard to do a full change over so one had to become bi-sexual for not only lengths but later in money. Despite working in metric, I still did (and do) go through mental gymnastics converting back or forwards to get a "Feel" for a tangible size. Since dressmaking sizes are taught to the youfs, 25cm means s*d all to me but 250mm is about 10".

I was only taught imperial at school so had to convert to metric on the job so to speak. I have never used cm and we never used them at work so I don't understand why cm are taught in schools. For the sort of things we built at work, working to 1 decimal place in millimeters seemed a much better idea than working to 2 decimal places in cm.

I like to think of myself as "linearly ambidextrous", but there is no way I could go back to feet and inches now.

Peter

Thread: Not enoughh CO2 ?
21/09/2021 09:09:41

Looks like wev'e run out of wind recently as well. When are we going to realise that the most reliable source of renewable energy is tidal power. I am not anti wind power but I do consider it to be only an interim solution to our energy "problems".

Peter

Thread: Small bandsaw needed
20/09/2021 11:29:06
Posted by blowlamp on 20/09/2021 11:01:20:

I'm very pleased with my Nebes 125 band saw. It's motor is nice and quiet - almost sewing machine quiet and the build quality is reassuring.

It was expensive, but feels like it would last a lifetime.

Bought before leaving the Common Market, it came from here: with free delivery.

Some pictures can be seen in my album.

Martin.

Edited By blowlamp on 20/09/2021 11:02:43

If I have to ask the price then I probably can't afford it.

Peter

19/09/2021 21:21:11

I have the Chester equivalent to the Warco CY90. It's not the best of quality but I got it at the right price so no complaints really. Didn't realise how much I needed one, beats a hacksaw anyday. If I was buying again I would be looking to go up a size, I seem to need to push this one to its limits too often.

Peter

Yes they do need a bit of fettling to get them to cut square

Edited By Oven Man on 19/09/2021 21:22:57

Thread: Garador door closer
14/09/2021 18:29:54

I have a similar problem on my garage door opener of a different make. I suspect that the problem on mine, and may be Peters, is that a current sensing resistor has gone a bit high. The control panel appears to be standard and the various settings are held in an EEPROM. Being like Peter I am reluctant to just pay for a replacement unit. I have got round my problem by bypassing the control unit with a push switch to manually open it. Closing can be done using the hand sets as normal. It's been like this for about six years now. It could probably be sorted by adjusting the values in the EEPROM by I haven't got a clue how to go about that.

Peter

Thread: A stark reminder to leisure cyclists !
05/09/2021 16:34:53

How times have changed. Back in the late 1960s/early 70s I got done for doing more than 40 mph in an Escort van on an unrestricted section of the A1 dual carriageway. Enforcement was very strict then, fine and licence endorsement.

Peter

Thread: One for the youngsters
28/08/2021 09:13:03
Posted by pgk pgk on 28/08/2021 08:48:23:

Grandpa gives his granddaughter a wristwatch. She shows it to her brother who asks "Does it tell the time?"
"No, Its old school - you have to look at it"

pgk

Thank you pgk. You have just made my day!

Peter

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