Member postings for Bill Davies 2

Gary, does it expect G03 vs G3? The error indicates the G code in that line, although, as Nigel indicates, there may be within that line of code.

Bill

Clive, I only noticed this a few years ago, I have a video I can't can't upload. The birds wheel about silently, briefly squawking at any noisy ones joining them. I realised last year that it was flying ants that they were taking, bobbing their heads to catch them in flight. Quite a sight. But the seagulls do seem noisier this year, or perhaps the enforced quiet makes it seem so.

Bill

Adrian, very annoying for you. Perhaps taking a small cut with the carbide insert was the problem. Inserts can lack the sharpness of HSS. Some are highly polished, I have no experience of them but some speak highly of those made for aluminium, when used on steel.

Prussian blue has been used for checking fit for a long time, and I have never found it abrasive, having used artists' oil paint before I bought the 'real thing.' So I doubt it is the cause of your problem.

Bill

Steve, regarding the ratios 1.00 x module for addendum (in mm) and 1.25 x mod for dedendum are the correct ratios for metric gears.

The 3.142 pitch indicates it is a 1 mod gear/rack (conventional rounding: 5 and above round up, less than 5 round down). The pitch line (PCD in DP terminology) should have 1/2 the pitch in each tooth and space segment. This will determine the width of the tip of the rack. I haven't calculated the overall height to sharp corners (2.72), so you may be correct.

Hobs are not produced to a sharp angle, but obviously allow some clearance above the outside diameter of the gear.

Bill

I find I use a No.3 for most jobs, which matches the table provided by Thor. Looking at very large items turned on YouTube, I note that the centre sizes are quite small relative to the work. I wonder what the failure mode is.

I have never seen a centre point shear off, which is unsurprising given that centres are made from higher strength steel than the average workpiece. The ones I made as an apprentice were case hardened but I would expect commerical ones are through-hardened. Equally, it is difficult for a centre to 'tear out' of the work, although I have seen that happen, e.g., when a jam occurs.

Bill

Eating yabbies brings back fond memories of staying with relatives near Moorine Rock, Western Australia, They were grown in large numbers in the 'dams' (pools) which are used for collecting water for growing wheat. But it was too expensive to send them to the 'other end' of Australia, where they commanded a high price.

Bill

And an earlier source than George's, indicating where it lies in a range of oils:

US Geological Survey 1909

Bill

And further to Michael's point, the socket 'safety' covers that people buy to protect children from accessing the sockets can defeat the included safety features. I had some that opened the live and neutral 'gates', but the plastic cover left small gaps around the socket holes that wire or other thin objects could be inserted into.

Bill

Martin, thank you and all your colleagues.

Such important work. Incredible that biology was considered so unimportant in my youth, that my generation of boys were not taught the subject. Just to be fair, the girls weren't taught physics.

Bill

Youra,

Looking at Richard's member postings, his last was on 27July 2012, so I don't think he will answer you. I think he means chamfer the edges to the same angle as the knurls (like pressure angle on gears). This would leave points which would I suppose give a matt effect when rolled repeatedly across the surface in all directions. It does seem like etching is an easier option.

Bill

Did you recently buy new paper, or is it stored somewhere cold? Slightly damp paper doesn't load well.

I also agree with HOWARDT about the weight of paper. At multiple worklaces, I have had problems with industrial sized printer/copiers that objected to 70g paper (or cheap 80g) the buying departmens tried to foist on us. If you check with calipers, full weight 80g paper is close to 0.1mm thick.

Bill

Referring to the 1987 manual (Turbo BASIC manual), p.307 tells us that putting the semicolon at the end of items to be printed supresses the otherwise automatic printing of a carriage return. I wouldn't expect another version of the program to give a different behaviour, as it's probably the most-used standard function in the language.

Nick's comment sounds like a good idea to move the cursor back. A problem I remember from TurboPascal (which was probably similar in behaviours) was that printing to the last character in the bottom line of the screen caused the screen to scroll up one line, which was unrecoverable.

Bill

Another option might be to print individual characters to file (BPUT?) using, e.g., a for loop.

Bill

Greensands, with regard to the function appending the 'newline' character(s), I agree. If you can print your string of characters to a small file and then view its size you will see if extra characters have been added. Unfortunately i haven't used Basic in a long time, but TurboPascal and other languages functioned the the same (if you pardon the pun).

I'm afraid I can't help on avoiding the newline from occuring.

Bill

My Basic skills are long out of date, but, I note you mention a record. Does this mean you are printing to file? In that case, I wonder whether it is using the newline to indicate end of record. If you can inspect the file, you would probably find two characters, CR and LF carriage reurn and line feed, if you are using a Microsoft Operating System. Separators between fields in the record might be commas or tabs, as determined by your programming.

If you can't hex dump the file, you can print one record to file with a known number of characters, and see whether the file is one OR two characters larger than that.

If you don't have a hex dump program, you might try HxD, which is free:

HxD program

If you've not used one before, you find it quite interesting to view various small files. You will need to find a table of ASCII codes, although many text files now us two bytes per character, in place of the original one.

I hope this is not 'sucking egg' territory.

Bill

I know it's not a DTI base, but I presume that the mechanism is similar:

Magnetic chuck .

See bottom of page 4 ; note the page order is a bit odd, perhaps the booklet was disassembled before scanning.

Bill

I was taught that permanent magnetic chucks circulate their magnetic field through the iron segments when turned off. When on, the flux flows out through one segment, through the work, and returns to the magnet via the adjacent segment. I've seen a diagram somewhere, but can't find it!

Bill

I hope, given these various points of view, that we won't lose your input to the forum, Phil, you have provided much useful information over time. Thanks for that.

Bill

Zebethyal, 65000 BTUs, that's a lot of energy. But I'm not familiar with the comment from the Matrix. However, it's a quantity of energy and not a rate of doing work. Assuming it is used up over a day, that's about 800 watts, over a horsepower, continuously, so no-one could keep that up for long! You'd have to eat quite a few steaks, so more bovine farting.

You have some nice projects, by the way.

Bill

Martin, your link to the global temperatures over time is very revealing. I have not any compelling 'natural' explanations for the rapid rise after relative stability for the last 12,000 years since the last ice age; orientation of Earth's axis, sunspots, etc.

Thanks, Bill

Edited By Bill Davies 2 on 25/02/2020 14:10:28