Report what you have been upto here (engineering related)
Andrew Johnston | 22/01/2017 21:08:35 |
![]() 7061 forum posts 719 photos | It's been a four C weekend. CAD: CAM: CNC: And the final bevel gears: The fourth C? That's from the well known modelling equation: CAD + CAM + CNC = Cheating! Actually there's a fifth C, I've got a cold. Andrew |
Michael Gilligan | 22/01/2017 21:45:34 |
![]() 23121 forum posts 1360 photos | Posted by Neil Wyatt on 22/01/2017 17:23:17: Posted by Michael Gilligan on 22/01/2017 16:24:55:
I have just spent a happy half-hour at the microscope, examining a slide of the spinnerettes of a Cross Spider [Araneus diadematus] ... < etc. >... The SEM images reveal the true beauty.
MichaelG. We demand a sketch of your own . O.K. Neil First, a correction: The objective on that 'scope is 45x not 40x Second, some excuses:
Now ... The Stereo microscope simply doesn't have the resolution to see much detail, but shows five spinnerettes in the spinner. The Leitz binocular does a pretty good job: With the 10x objective: It appears that the spinnerettes are roughly globular [the wrinkled surface is probably because they have 'deflated'] and I suspect that they might move like the air vents on a Mk.1 Cortina. They are sparsely covered with hairs, and I think the 'spindles' are modified hairs. With the 45x objective: Some detail of the spindles can be seen ... but we're limited on resolution, and it is only having seen the SEM images that I can tell that their apparently long hairs must actually be a short bristles which have some silk 'extending' them. So ... One strand of Spider Silk is five sub-strands, each of [guess] sixty sub-sub-strands, all fused together at the point of departure from the spinner. ... All this from a 'printhead' about 1.8mm across. . If anyone knows more ... please add. MichaelG. . Edit: This photo seems to validate my stereo-microscope view: Edited By Michael Gilligan on 22/01/2017 22:14:50 |
Muzzer | 22/01/2017 21:55:12 |
![]() 2904 forum posts 448 photos | Busy weekend for me too. Yesterday connecting up the water and waste connections for the new utility room, toilet and workshop sink and installing the cupboard and worktop in the utility room. As you might expect, I will need to find an unusually tight soil pipe bend due to the positioning of the socket outside (seems to be traditional), so that job is on hold. Today preparing to power up the first radiator in the workshop and fitting the roller shutter door. I thought it best to paint the walls before fitting the rad and door, then fitted the hanger brackets before I realised I'd run out of 10mm pipe fittings. Job on hold until tomorrow evening. Still, plenty other stuff to get on with. But the sooner I get some heat in the workshop, the sooner it will dry out and become habitable. Then onto the roller door. Quite simple in the face of it - bolt the runners either side of the opening onto the wall and the side plates above that, then lift the roller into place. Then "simply" drop the shutter ("curtain" I'll resume later in the week once I have a cunning plan, probably involving some webbing to draw it over the roller in a vaguely controlled fashion and / or drape the curtain over a pair of tall step ladders. It will take "some time" to finish this project off so I will obviously get the workshop functioning before the myriad tasks involved are all complete. Murray |
daveb | 22/01/2017 22:01:09 |
631 forum posts 14 photos | Posted by Clive Hartland on 22/01/2017 19:06:29:
Re the spiders web for telescope reticles, they starve the spider and if they do not the resultant spiders web will have small dots of faece's on them. The reason to use spiders web is that resists the recoil shock of the gun firing.
Clive, it's bad enough getting a faceful of spider web without knowing its covered in spider poop. Dave |
Bob Brown 1 | 22/01/2017 22:10:36 |
![]() 1022 forum posts 127 photos |
I'll resume later in the week once I have a cunning plan, probably involving some webbing to draw it over the roller in a vaguely controlled fashion and / or drape the curtain over a pair of tall step ladders. Murray It is far easier with two people, there was no way I was going to get mine in place on my own but then again it is 3 metres wide.
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Michael Gilligan | 22/01/2017 22:37:13 |
![]() 23121 forum posts 1360 photos | Posted by Andrew Johnston on 22/01/2017 21:08:35:
It's been a four C weekend. ... The fourth C? That's from the well known modelling equation: CAD + CAM + CNC = Cheating! Actually there's a fifth C, I've got a cold. . Permit me to add a sixth and seventh Congratulations and Commiserations MichaelG. |
Neil Wyatt | 23/01/2017 10:26:16 |
![]() 19226 forum posts 749 photos 86 articles | Posted by Michael Gilligan on 22/01/2017 21:45:34:
Now ... The Stereo microscope simply doesn't have the resolution to see much detail, but shows five spinnerettes in the spinner. The Leitz binocular does a pretty good job: With the 10x objective: It appears that the spinnerettes are roughly globular [the wrinkled surface is probably because they have 'deflated'] and I suspect that they might move like the air vents on a Mk.1 Cortina. They are sparsely covered with hairs, and I think the 'spindles' are modified hairs. With the 45x objective: Some detail of the spindles can be seen ... but we're limited on resolution, and it is only having seen the SEM images that I can tell that their apparently long hairs must actually be a short bristles which have some silk 'extending' them. So ... One strand of Spider Silk is five sub-strands, each of [guess] sixty sub-sub-strands, all fused together at the point of departure from the spinner. ... All this from a 'printhead' about 1.8mm across. Excellent, I'm glad I asked |
MW | 23/01/2017 17:29:22 |
![]() 2052 forum posts 56 photos | I had problems trying to think of a present for a friend whom I haven't seen since prior to Christmas, Its tricky when you don't know what to get people. So I cut a piece of 1/8 brass out and made him a nameplate, so that way he can stick it on something he does like! I got a bottle of port as well, not only because it's my favourite tipple, but it's a very seasonal drink. I cut it on the mill with a 60 degree carbide tool, ground half way back on it's face. It cuts lettering very well. I shaded it with a permanent marker to help the lettering stand out and polished it with a cloth after some wet/dry paper was rubbed over it. I'm sure he will never see this but he has been a good friend to me and helped me much through a difficult time. Thanks again, MW Edited By Michael-w on 23/01/2017 17:32:35 |
SillyOldDuffer | 23/01/2017 17:51:20 |
10668 forum posts 2415 photos | Mended a washing machine. Alas I have become the go to guy for all manner of domestic repairs since friends and relatives found out that I cut metal for fun. So much so I'm thinking of doing a MEW article on unblocking toilets so the rest of you can acquire one of my more popular Model Engineering skills. Dave |
Bob Mc | 23/01/2017 18:15:37 |
231 forum posts 50 photos | I had a go at making the Universal Screw Mod Fixture in latest issue of MEW 251. This is my rendition of John Ashtons design which I desperately needed for reducing diameters & lengths of small screws for an 00 gauge rolling road I am about to make. ... Thanks John for your article; not only is the fixture usefull for small screw holding but I found that it helps when holding bushes which need to be cut to precise lengths.. I hope John doesn't mind my alterations .. I didn't have any hex bar so I just used some round stock and put a knurl on it.. see photo's of screw fitted ready for trimming to size and how I use it to hold a nylon bush also for trimming to size. |
John Gardener | 23/01/2017 19:07:09 |
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JasonB | 23/01/2017 19:14:19 |
![]() 25215 forum posts 3105 photos 1 articles | Posted by Andrew Johnston on 22/01/2017 21:08:35:
It's been a four C weekend. Gears look good Andrew and looks like the program ran with out any C**kups Do you have teh second pair still to do or did you get both sets out of the way? Valve gear next?
J |
JasonB | 23/01/2017 19:17:33 |
![]() 25215 forum posts 3105 photos 1 articles | Posted by Muzzer on 22/01/2017 21:55:12:
As you might expect, I will need to find an unusually tight soil pipe bend due to the positioning of the socket outside (seems to be traditional), so that job is on hold.
These will be the tightest you can get, most decent plumbers merchants should have them but not the DIY sheds. Don't pay that price for them though! Edited By JasonB on 23/01/2017 19:19:24 |
John Gardener | 23/01/2017 19:18:21 |
![]() 75 forum posts 21 photos | Today I managed, in between nursing She Who Must Be Obeyed and other domestics, to get into the shed and work on my first engine. I finished the flywheel bearing support and gave it my own version of the engine turning treatment. I used a primer pocket brush and although the pattern is quite deep it is a much better finish (I think) than the attempt to polish out the deep scratches I had made on the aluminium. Inspired by me seeing, as a kid, the film Spirit of St. Louis. The engine was inspired by Brian Rupnow's plans so I have decided to call my engine 'Spirit of Brian.' Tomorrow I am hoping to make the eccentric hub if I can figure out the (best??) way to do it. |
John Gardener | 23/01/2017 19:19:35 |
![]() 75 forum posts 21 photos | |
Neil Wyatt | 23/01/2017 20:01:02 |
![]() 19226 forum posts 749 photos 86 articles | Posted by Muzzer on 22/01/2017 21:55:12:
Yesterday connecting up the water and waste connections for the new utility room, toilet and workshop sink and installing the cupboard and worktop in the utility room. As you might expect, I will need to find an unusually tight soil pipe bend due to the positioning of the socket outside (seems to be traditional), so that job is on hold. As if spider faeces aren't scatalogical enough. Neil |
Andrew Johnston | 23/01/2017 20:03:57 |
![]() 7061 forum posts 719 photos | Posted by JasonB on 23/01/2017 19:14:19:
Gears look good Andrew and looks like the program ran with out any C**kups Do you have teh second pair still to do or did you get both sets out of the way? Valve gear next? All four gears are done; I ran the last one this morning, while working. All four here, plus the aluminium test gear: The CAM program ran flawlessly, and I didn't break the cutter. Just as well as it was £12. Of course I had a spare, which is why it survived. If I only had one it would have gone ping first thing on Saturday morning. I can't claim a c*ck up free weekend. I fouled up two blanks due to a defective lathe operator. Bored one hole too large before reaming, and read the wrong (shorter) dimension off the drawing for overall length on the other. I need to redesign the valve gear before starting on making it. I'm sorely tempted to machine the cylinder blocks as, apart from the valve ports, they're pretty much modelled in CAD. And all the key features seem to line up with the rest of the engine, as expected. However, I need to be strict and do tedious things like get the wheels and front end finished. It'll stop me tripping over piles of parts on the kitchen floor, and it might even look like I've got a traction engine once it is on wheels. Be easier to move too when I want to revamp the kitchen. Andrew |
Muzzer | 23/01/2017 20:20:08 |
![]() 2904 forum posts 448 photos | Posted by JasonB on 23/01/2017 19:17:33:
Posted by Muzzer on 22/01/2017 21:55:12:
As you might expect, I will need to find an unusually tight soil pipe bend due to the positioning of the socket outside (seems to be traditional), so that job is on hold.
These will be the tightest you can get, most decent plumbers merchants should have them but not the DIY sheds. Don't pay that price for them though! Edited By JasonB on 23/01/2017 19:19:24 Yes, that looks almost workable. I found a very similar solvent bend from FloPlast (SS168) but nobody seems to keep them on the shelf - appears to be a minority sport for people who have screwed up. The other constraint is the diameter of the hole through the wall (~110mm) which precludes push fit versions unless I fancy chiselling out the hole to a depth of several inches. Then I found this at Toolstation. Would allow me to disassemble it without resorting to a saw. Not giveaway cheap but I've got a life to live and a long list of jobs to get through. If it doesn't look up to the job I'll see if I can find a stockist with one of yours... Talking of which, I'm looking at floor paint for workshop use. In an ideal world I'd cough up for some epoxy 2-part paint but it's around £60 for 5L, plus £50 for 5L of sealer beforehand with coverage claimed at 8m2 per litre. For 75m2 of floor space that's quite a lot, around £220 just for the liquids. On the other hand, something like this would work out around £60 (plus some PVA wash possibly). Does anyone have experience of floor paint to share, good or bad? Murray |
JasonB | 23/01/2017 20:28:21 |
![]() 25215 forum posts 3105 photos 1 articles | When I wanted one a couple of months ago the usual plumbers merchants I get tehm from said they were having a job getting tehm but I managed to pick two up from city plumbing no problem., different maker. Did my garage in Dulux trade floor paint 20yrs ago and that gets used for woodwork and I'm in there 50% of the year, not work even in teh areas where I tend to stand. That was onto a new screed. I have used Watco 2 part paints and repair epoxies for work, good but costly. |
Neil Wyatt | 23/01/2017 20:30:33 |
![]() 19226 forum posts 749 photos 86 articles | Posted by Bob Mc on 23/01/2017 18:15:37:
I had a go at making the Universal Screw Mod Fixture in latest issue of MEW 251. This is my rendition of John Ashtons design which I desperately needed for reducing diameters & lengths of small screws for an 00 gauge rolling road I am about to make. ... Thanks John for your article; not only is the fixture usefull for small screw holding but I found that it helps when holding bushes which need to be cut to precise lengths.. I hope John doesn't mind my alterations .. I didn't have any hex bar so I just used some round stock and put a knurl on it.. see photo's of screw fitted ready for trimming to size and how I use it to hold a nylon bush also for trimming to size. Excellent Bob,
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This thread is closed.
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