Here is a list of all the postings Robin has made in our forums. Click on a thread name to jump to the thread.
|Thread: Any Old Gun Experts out there?|
There is a lovely Illustrated London News article on making the Enfield barrel from strips of Marshall's iron. The Time Team excavated Marshall's B'ham factory to reveal the super hot furnaces where he melted the crucible steel
Looks like the Enfield rifle tool to me, would it fit a .577" bore?
|Thread: Anyone updated to Windows11 yet ?|
Think of all the new things I might not have permission to do. Windows is like having a dominatrix without the spanking. Lurvely
|Thread: UK fires up old coal power plant as gas prices soar|
Blimey, if I didn't know better I might start to think you lot are not entirely convinced we are heading for a toasty thermageddon
|Thread: Painted granite surface plate|
That's a relief, I shall do the sides next.
Methylated spirit seems to dissolve the green colour of my Scotch-Brite so I will switch to Regina Blitz.
I just bought my first surface plate in black granite.
At least I thought it was black until I looked at the bottom which appears speckled grey bordering on white.
Knowing the Chinese proclivity for making something nice then destroying it at the last moment, I cleaned off a layer of paint using acetone, methylated spirit and Scotch-Brite.
It is still dark grey but a lot smoother. My height gauge slides around like Torville and Deane after a few bevvies.
Have I destroyed it?
|Thread: Parting off - front or rear|
I thought this was a wrinkle for spindles running in bronze bushings.
Normal wear on the bushing is at the top.
By putting the parting off tool at the back upside down you could use the unworn bottom of the bushing.
If you have tapered roller bearings then it is for fun only.
I like fun.
I could be completely wrong about this, but not about the fun part
|Thread: What Did You Do Today 2021|
For the first part of this millenium I was haemorrhaging tap wrenches. I like the Eclipse ones but they are usually a bit pricey.
Suddenly the price on Amazon has collapsed. I popped a 240, a 241 and a 242 in my basket then had to add another 241 to push it over £20 and qualify for free shipping.
They are now arriving and look like the real McCoy.
I expect everyone else gets them free with cornflakes, I am usually the last to know, but thought I should mention it just in case
|Thread: Mill power feed using stepper motor|
I think mine is much prettier but it's running off a Z80 so no points for processing power.
I have one suggestion: Put a pulley on the handle and hang weights off it until you know how much torque you need to break it free.
It is very hard to guess and you don't have to.
|Thread: Small Hydraulic Press Tools|
Me too I discovered that I could buy the standard car engine hoist ram for not a lot.
It has a 19.5" stroke for broaches and supposedly delivers 8 tons.
Take that with a pinch of salt, but as my personal taste in broaches are all rated <2 tons it matters not.
I very nearly finished it but then I blew my CNC software and everything stopped
|Thread: Saving the Planet … or is it ?|
Can they switch Drax back to coal or is it stuck burning wood? I hear that Chris Huhne, liberal energy loon in the Cameron Clegg partnership, has made a fortune converting American forest into wood pellets.
|Thread: Not enoughh CO2 ?|
Pre-1880 pre-dates Phileas Fogg so the error bars widen
I don't quite understand how CO2 can affect the climate without warming it???
"Overall the globe has cooled substantially since the last El Nino ended in 2016, and it now appears the cooling trend will persist another year as the CFSv2 is forecasting a La Niña to continue into spring 2022".
A bit of a cheat there because there was a spike in the 2016 temperature, but with the global warming freaks getting the screaming ab dabs about anywhere on the globe having warm weather, you can't really blame them.
The extra CO2 continues to have a dramatic effect on my garden where the plants are on a binge and are growing quite out of control. My lawn has tussocks.
|Thread: Back to Imperial|
Lots of ways to draw an arc, the problem comes when you want to extract that arc in to your CNC to cut it.
AutoCAD gives you a dxf or drawing exchange file from which you can extract the drawing entities.
Lines have start and end co-ordinates.
Arcs have a centre coordinate, a radius, a start angle and an end angle.
I actually use the more affordabe ProgeCAD but sadly they rather lost the plot drawing tangential lines and arc with version 2019
I feel your pain. Unlike Gerber, AutoCAD defines an arc by angles rather than by end points, Stray from the cardinals and nothing quite fits
The problem with metric is that third digit on the DRO or digi-caliper.
The hours I spend setting it to perfection on the cross slide only to see it blasted out of existence the moment tool tip meets steel.
Come back thou, all is forgiven
|Thread: What Did You Do Today 2021|
Yesterday I turned off everything in the workshop, shut down my computers and went with my son and my granddaughter, aged 6, to Chessington World of Adventures where I spent lots of money. Best day ever
|Thread: How to post lithium batteries?|
You can send new lithium batteries fitted in new Chinese goodies. However sending them back would be a different kettle of fish. Do I want my new Chinese goodies in the same van/lorry/aeroplane as your duff Chinese goodies that may have failed because they were so cheap they had to skimp on the battery protection circuit?
|Thread: Milling machine coolant system|
I use a 1/4 hp suds pump and flow rate is not a problem.
I return the suds to the tank via a filter bag designed for straining carp pooh out of a koi pond.
That keeps the flow restriction tap clear.
|Thread: Design Award|
Second place went to the chocolate teapot
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