Member postings for Bazyle

I'm kind of wondering if the end product includes sulphuric acid.......
Probably not critical though.

Built-in screwcutting tool retraction is a nice feature.

The advantage is that you save postage, often pretty high on yards of metal etc and can see the item before purchase. The days of lots of show bargains ended about twenty years ago but sometimes you get lucky.

BTW a bit late now but if you want a big lump of metal or specific kit or machine you can often email/phone an exhibitor and arrange to collect at the show. Not necessary for general stock items but once Noggin brought along a foot of 3in steel for me so massive saving in postage.

So it is a design or manufacture flaw, but if we are going to moan about small errors why is this thread called 'draw angle' when that is not the issue?

Originally things had Red LED for off and green or other for on, Then the 'on' state seemed rather pointless as it was obviously on when making a noise. Also not having the green LED saved money. I had to fight to get each button on our products 'cos they cost 20p each. If less than 5 years old it will, by EU regulation Lot23', consume less than 0.5W when in standby.

The standby power regulations were brought in originally decades ago to stop coffee machines sitting there with a heater under the pot. Then they kept adding to the list of devices regulated and dropping the allowed power. Although it seems petty, now with loads of devices in every house it probably saves £30 a year in electricity. I think I calculated once that the standby LED in all our company products deployed amounted to 1MW.

Systems engineering takes the overall requirement, say for a family car, and defines the upper level design to make all the bits work together such as engine size and number of seats that makes it different from a say a sports car, but doesn't go into the fine detail of how thick the metal body should be. Then it will detail some features like the wheels must be bolted on not welded so they can be changed, but again not say how many bolts to use.
In electronics it would say that a modern laptop must have a wifi interface whereas 15 years ago it would have had an Ethernet port only so that it can fulfil the requirement of working in a modern home.
I was an electronics systems engineer for about 30 years but in the cable TV industry the role is called 'Architect' which confuses everyone and never felt right to me.

It is only when the manufacturer knows a large volume of chucks will be ordered that it becomes viable to make them specific to just one lathe nose thread. Myford as mentioned above and Boxford also did a threaded low profile 4 jaw for the schools market.

Regular hobby shop piano wire often contains slag and inclusions that cause it to break on sharp bends. It is chance whether you hit one of these defects at your bend. It has never been possible for hobbyists to reharden it. This is part of the folklore of aeromodellers who use lots of it.

Try bicycle spokes which seem to be more cooperative.

I don't have a modern Myford so not sure of the drive - is it by the rack or a very slow screw thread? Is the leadscrew imperial and the marking actually every 1/8 inch ? Or does it correspond to the pitch of the rack?
If the latter then it firstly points to a bit of swarf in the drive gear.
If the former and it uses a slot in the leadscrew to drive the rack gear (as on Boxfords) the sliding key inside the worm may have a burr or swarf catching on the edge of each pitch of the leadscrew.

On my Boxford I once found the weight of the sticking out handle part of the carriage handwheel as it went over top dead centre caused it to take up the gear slack and make a mark if everything was very loose.

I suggest in that case it is for making a hole in the side of a lead pipe to solder another one in, hence the starter spiral.

Bill a cruise would only have lasted a few days. Now you can spend the money on another shed and tools which you can enjoy every day for years

I was as it were brought up on Def Stan 0521 which then became ISO9000. If you think that was onerous you should try the extras required for satellite flight hardware - of course you do rather need to be sure it is going to work before you launch it, no backsies there.

Today I took some genuine crap from the Men's Shed to the 'we are a recycling centre not a waste depot'. So sad to see the metal bin full of perfectly good iron gates, wheelbarrows etc, and saw an unblemished cash box in the general skip complete with key but not allowed to recover it.

Some people seem to be missing the point of vector graphics and displaying with a plain 'scope screen. The OP is not trying to make a raster scan system nor a pixel based one.

There is a pretty common (nowadays) code standard - G-code, and programs that generate it. It is fundamentally just start point, end point, move from one to the other. The only difference from the OP's initial criteria is the 'z' coordinate of beam on/off which is a separate command. A pre-processor could adjust this if necessary, just as one uses a pre-processor for a particular CNC machine.

Not helping but more reminiscences. In 1973 in my college a chap called Adrian Aylward had a homebrew computer with TTL state machine ALU not a microprocessor just 1k of core for program and RAM with a teletype and a 5in 'scope screen for vector graphics, probably the first student computer in the country.
His main game was a binary start rotating in the middle with two spaceships (pointy triangles) which you could rotate, apply thrust, and fire a stream of bullets, while being pulled into the star by gravity. All that in just 1k. When 'teletennis' appeared he just programmed that in too.
I wonder what became of him. I didn't hear of another homebrew in the university until 1977 and I graduated before starting my 6800 based one..

Gosh, just realised I now qualify for the oldies 50p discount.

For those with the equipment there are plenty of drill holder options for 3D printing or laser cut ply.
At my first job all small stores requisitions were supplied in little brown envelopes, about 3"x2" which now fit in a cardboard box like a card index. I still find this the most simple system when you don't have a complete set though some envelopes are now tatty as nearly 40 years old.

Wireless thermostats can be moved around which can be an issue. Our church has a Hive system and we found the wireless thermostat had been put in a cupboard in the vestry so it didn't get fiddled with. This and the church hall are sensible buildings for a remote control system as they may need turning on and off without the operator being present in person. Domestic remote control systems only encourage people to set the heating to come on before they get home and heat an empty house.
However I wish I had a remote for the only heat in this house - the small inset log burner in front of me as I have to get up out of the armchair to adjust the air flow. sigh.

BTW if you want to provide a remote off switch for TRVs you can put a small resistor on them and use it to deceive them as to the room temp. Sure it uses a Watt or two but that is less than the heat wasted from the radiator.

Poured hundreds of gallons of water down a hole and watched disappear (and twice yesterday) - surprise it did as it was on top of a hill composed or 90% shale rocks from 3 inches below the surface.
All part of the drainage test required for the new Men's Shed planning application. What a colossal waste of time energy and resources. Hire digger, dig hole, pour in water, fill hole.
If the planning department were even half as clever as their astronomic fees imply they should have known the nature of the land from its position and being right next to a recent development hat had to do the same test.

One of the other problems I once found was a buy-it-now that included the postage but the seller was only half a mile from me and there wasn't a way of removing the postage and offering to pick it up. Even thinking about trying a message exchange meant it was bought by someone else.

Well I think the mods must be doing a pretty good job behind the scenes as I don't see here the swearing or abuse I have seen on other forums. However it is a bit like the people who moan about TV content, if you don't like it don't read the thread or turn off the video. I rarely watch youtube with the sound on (er a necessary mode at work) so maybe miss something.