Member postings for Chris_C

Some really interesting photos and topics in here. I'm aware I don't post much, mainly lurk, but a followup to my camera phone photos a fair few pages back. This time on the proper camera, with some very bad quality extension tubes (Bang good, one fits the camera correctly but is too long for this job, the others don't)

Raphael correctly identified carnivorous plants, these are pigmy sundews, drosera roseana. I tried taking a few others, but these seem to be a better subject (read... deal with my lack of skill!).

They are just getting ready to flower it seems (they are fairly new to me grown from gemmae last autumn and all do a bit of their own thing) and catch naturally.

The mention of smartphones getting better made me wonder what mine could do with macro esque.

Thats better than I expected, those are in a 3" square pot!

Yes, but not for a few years! I wanted to have a go at macro when I was a student but couldn't justify a lens, I managed to get an reversing adapter (EOS to... 52mm I imagine filter thread), and a Pentax 50mm from the local chemist for £5.

Very shallow depth of field (see the 5p photo!) but good fun. I should dig that out and have a play tomorrow, not used it for years. Thanks for reminding me! Have been enjoying seeing others photos here, some stunning shots.

And a commercial game, not a bespoke sim by one of the teams. (published by Codemasters for anyone who was into computing in the 80's)

With a fairly expensive wheel and pedal setup, but it really is impressive.

That is sad news. I never met Don, but did exchange a few pm's on the proboards website about valve gear for my 14xx. I had been struggling to purchase a copy of his book, they were not available in the usual stockists and between discussing the valve gear and a few other most interesting things he asked me for my address. A copy of his book turned up a day later and he wouldn't accept even postage. He came across both very knowledgable, but probably more so generous, the responses to my questions were always fully enlightening and we'd never met.

Its not for everyone, but book bound saves a massive amount of space compared to individual magazines.

However, it's not cheap, very few places now do it and you can't lay an article flat for future scanning, but for me the advantages (space) outweigh the disadvantages.

Another "yes" to the auto dark masks. My old one was very past it last year and I'd mentioned to Mrs C that I needed to get round to buying a new one. One day she came home from shopping with the Lidl one and the receipt in case she'd bought the wrong thing.

I've been very happy with it, much better than my older more expensive one.

That's an interesting point I hadn't realised Neil. In which case, for my 10 tpi leadscrew lathe that I printed a 63 tooth gear for years ago (which has stayed as it worked very well for a feed and my lathe is too old and not posh enough for a separate power feed shaft) it looks like I would be better off printing a 39tooth for metric cutting if I ever need one (although, looks like 79 fits a bit better, I'll have to see if the diameter fits). I had solely thought of it in terms of an approximation of half 127.

Thank you!

Thanks both!

As Michael you've ordered the kit, and Geoff as you say you have a few, how good are they at keeping time?

15 or so years ago I used an 8 pin PIC to replace the mechanism in a cheap ball bearing clock when the contacts stopped triggering the ball lift arm and driven by a crystal I had to calibrate the system and add a cal factor in the firmware to get to within a minute every 6 months.

Nowadays, I just put an RTC on board, which I can't see on those boards. Would be interesting to know if I don't need to!

I'd also get in touch with the NACC (their magazine is Buzzin' as mentioned above). They stock transfers, and list 3 different NSU ones at £3, £3.50 and £7 (no idea what or which a quickly would need, I'm a Cyclemaster person!)

What a neat and (so it looks!) easy to make a design. Thanks Jason, I'll be making one of those in the next few days, the one that came with the miling vice on my machine just has an M6 tapped hole so you can wind a bolt in or out a bit. Fine, but as you say, anything that is narrower than 6mm (well, it's no against the fixed jaw, more like 9 mm) and you can't use it.

Edited By Chris_C on 21/10/2018 15:52:12

Another "they definitely aren't a taper" message here.

What might be useful is if you know/can find what letter code they are. Whilst the carbs may have been specially made, the needles may have been used elsewhere. (Granted, they also may not!)

A quick google search for "carburettor needle specification" brings up a book with tables as described by Howard above as the fifth link. It may be my lack of spelling ability in that search was key to the result

Whilst I'm not Dean and don't want to distract from his thread, yes, I think there is an awful lot of both of those problems. I've been drawing a 14xx in CAD, nominally starting with Martin Evans Dart, then modifying to John Smiths additions from ME a few years ago, along with a few changes I've added to ease of manufacture with the tools I have available. It's fair to say there is well over 1000 hours invested in the model now (I'm aware quite how much swarf could have been made in that time, but it's how my mind works)

Getting each set of holes matched for fastners to completely align is (nominally) critical in the 3D model. You can give tolerances, but it massively affects CPU time when you try to adjust any component (and I've aimed for user controls to adjust wheel rotation, brake, reverser, drain cocks, etc so that I can spot linkages fouling, Dart has a brake linkage crashing into the motion when in reverse problem as drawn). Most of these if you find a missing one when you are in the workshop, you'd just spot through. Angles/dimensions aren't always present on all faces as it's expected that the castings will be available so fully dimensioned drawings aren't given, just those of the important faces for the builder to machine. Bends in linkages that you would just tweak to fit in the workshop suddenly need a secondary geometric sketch to calculate the angles (although, I imagine I would do that to know the length of material to make them from in the first place, given most again list hole centre distances rather than "length of pre bent part".

I've mentioned to Dean previously that I have no idea how he gets through the 3D modelling at the rate he does, but it is great to watch! I agree, a website in some form would be ideal.

This club have been at the NEC Classic Car show the last few times I've been. I had a chat with one of the gents on the stand last year, but no further involvement than that

http://www.britishhistorickartclub.com/2016/

Keyless chucks certainly exist in J33, I found a keyed Jacob's when I started stripping my Mercury on ebay, thanks to a saved search (the drill had been left in the garden with a 6" grinding wheel in the chuck on an arbor for lawnmower blade sharpening).

A few months later, the saved ebay search netted a keyless Rohm for 99p. It's the loveliest chuck I've ever been near, very silky action.

We have one at work, I've used it to drive pressure sensors in simulations. The one bit of advice I was given was to spin the weight to make sure the piston didn't stick, but I do wonder how much that is really required!

It's one of those things that has now become habit whenever I use the machine, so can't make an objective assessment!

Hi Dean,

I'm not used to Fusion, but use Inventor. If they are anything like similar, if you keep number of components in an assembly low, but use more nested assemblies, you make life easier for the program. I'll keep the links as text so as not to disturb your thread.

I have Stephensons working (2 versions in my case, as two authors have had a go, with reverser position and suspension height adjustable) and whilst the version in this video (**LINK**) doesn't have a huge number of components the assembly is now as per this photo (**LINK**) and it still runs fine. I do render the animations rather than run them in real time though, I wonder if that makes the difference?

For what its worth, my assembly tree (not sure of how that should be named) is roughly

• Main Assembly
  • Frames with cylinders. tanks, bunker, smokebox
  • Axle
  • Crank axle
  • Pisons, rods, big ends
  • Valve assembly

That way, the program only has to deal with a few components during the animation phase, even if underneath the individual assemblies are complicated in themselves.

Really enjoying this and your previous locos, all the best!

That was a most enjoyable half hour, thanks Mark. Even more so as Mrs C's profession is in languages, so gained more approval than the normal barrage of Mr Pete etc from Youtube!

From the rest of the discussion on programs in the UK, TV is very sparse of good in depth content and the lack of OU programs now seems to have reduced it further. Horizon and QED when I was growing up I enjoyed, though struggle to know if my knowledge has increased or the program now gives less detail. I do think (hope?) that those making the decisions for TV companies will see people leaving the standard broadcast channels for youtube specialist channels and hopefully start to commission more in depth programs.

Michael, these are 16 DP for an idea of size. Photos aren't great, not much light in the workshop so depth of field is a bit shallow but it shows the required detail in certain areas. I've added high res versions so they can be zoomed into.

High res link: **LINK**

This one shows the lack of wear on the teeth given the use. Its sharp enough to see the tooth profile at the top of the gear by the cast one.

High res link: **LINK**

The test is just visible in that, though it didn't come out super well in real life either, but it lists tooth count, dp and pressure angle.

High res: **LINK**

The machine that made them is an Objet 30 Pro by Stratasys (**LINK**), so rather than material being a plastic filament melted and positioned by a CNC head, resin is deposited much like an ink jet printer and cured with a U.V lamp. I imagine there must be companies offering the services of machines of this kind, but as I have access to it haven't looked into them I'm afraid.

Hopefully there is enough sharpness to show the tooth profiles in the high res photos.

Neil, it you think it would be of interest to people then certainly, I can do some better photos with natural light.