Stanley Melrose Posted June 4, 2016 Share Posted June 4, 2016 Reducing the mounting pin diameter to 1.5mm seems to have passed Shapeway's automatic model tests so on that basis I have re-uploaded with the smaller pin and re-ordered samples. Interestingly the reduction in material volume has also resulted in a price drop. I just hope they now pass Shapeway's manual checks. LNER Torpedo Vents 2.jpg Hi Mike, Are these vents the same as those used by the LMS? Stan Link to post Share on other sites More sharing options...
davefrk Posted June 4, 2016 Share Posted June 4, 2016 (edited) Hi Mike, 3D printing certainly looks 'the' way to go in the future. There's me sitting down and making brass masters for mould making then having to cast them when I could get them 3D printed. I have tried some 3D masters but at the time the finish wasn't up to par so I returned to hand crafting them, the ones pictured look very good and I've heard that Shapeways have invested in new 'top of the range' printers so I would expect the quality to be better. The torpedo vents look nice and to answer the previous poster, I could find very little difference between the LNER vents and the later LMS ones that I have done in the Lanarkshire Models range, I'm sure you Mike would have found the same result. Now how about some of the four or five types of shell vents, nightmare.... Anyway, nice to see your name back up there. I was looking to be retiring in a couple of years anyway!!! All the best, Dave Franks Edited June 4, 2016 by davefrk 1 Link to post Share on other sites More sharing options...
MikeTrice Posted June 4, 2016 Author Share Posted June 4, 2016 Hi Mike, Are these vents the same as those used by the LMS? Stan I cannot say they are identical but any differences are not obvious. It was an LNER GA used as the basis. As far as I am aware the SR version was slightly different. Link to post Share on other sites More sharing options...
MikeTrice Posted June 4, 2016 Author Share Posted June 4, 2016 ***** IMPORTANT ANNOUNCEMENT ***** Talk about a fast learning curve. The method I used to layer copies of the individual mouldings for the GNR 6 wheel carriage axleboxes and springs and the assorted GNR wagon axleboxes will result in a less than optimum print from Shapeways due to the way Shapeways use the support material. After much head scratching and working out why the support material has the effect it has, I have come up with an alternative method of spruing that should avoid the issue. I have revised the GNR Carriage axleboxes and provided alternative options for ordering for 3, 6 or 12 coaches (both higher quantities are restricted to FUD only). So if anyone has ordered either the GNR 6 wheel coach axlebox/springs or the assorted GNR axlebox/springs and it is not too late to do so, I would advise cancelling your order and re-ordering (I will announce when I have re-sprued the GNR assorted axlebox/springs. Unfortunately it is too late for me, my order is already in production :-( Apologies. P.S. The way Shapeways works is if you have an existing order going through the works you can add further items at a later date and include them with the previous items in a single postage. On checkout select the shipping options and if you have an existing order you can select to defer those items shipping date to include the new items. Link to post Share on other sites More sharing options...
MikeTrice Posted June 4, 2016 Author Share Posted June 4, 2016 Hi Mike, 3D printing certainly looks 'the' way to go in the future. There's me sitting down and making brass masters for mould making then having to cast them when I could get them 3D printed. I have tried some 3D masters but at the time the finish wasn't up to par so I returned to hand crafting them, the ones pictured look very good and I've heard that Shapeways have invested in new 'top of the range' printers so I would expect the quality to be better. The torpedo vents look nice and to answer the previous poster, I could find very little difference between the LNER vents and the later LMS ones that I have done in the Lanarkshire Models range, I'm sure you would have found the same result. Now how about some of the four or five types of shell vents, nightmare.... Anyway, nice to see your name back up there. Looks like I will be retiring in a couple of years time... All the best, Dave Franks Thanks Dave. The quality of your items is superb, as I know from experience. Unfortunately not all manufacturers follow suit. Like you many years ago I hand made patterns in brass, but have always prefered the option to do things electronically (and hopefully more accurately). It is certainly quicker. One thing about 3D printing is every item is identical, truly round and with no registration issues. As such they look crisper. Also as has been stated previously once I upload a model, Shapeways take over the production and commerce. Link to post Share on other sites More sharing options...
jjnewitt Posted June 4, 2016 Share Posted June 4, 2016 I was looking be retiring in a couple of years anyway!!! I hope you keep going a bit longer than that Dave. I've yet to see a 3d printed buffer that matches the quality of your castings. Justin Link to post Share on other sites More sharing options...
Horsetan Posted June 4, 2016 Share Posted June 4, 2016 ....I was looking be retiring in a couple of years anyway!!! *cue early panic-buying* Link to post Share on other sites More sharing options...
davefrk Posted June 4, 2016 Share Posted June 4, 2016 *cue early panic-buying* DON'T PANIC!!!! I'm not going yet. Still lots of bufferstops to do and some RIV/UIC wagon buffers to finish, yes they are on the workbench as we speak/write, the 'ribbed back' heads are very nice if I say so myself. Dave Franks Link to post Share on other sites More sharing options...
MikeTrice Posted June 4, 2016 Author Share Posted June 4, 2016 The GNR Assorted Axlebox/Springs model has now been re-sprued and re-enabled in my Shapeways shop. Hopefully that is any issues sorted so I can get on with more development. 1 Link to post Share on other sites More sharing options...
MikeTrice Posted June 8, 2016 Author Share Posted June 8, 2016 The GNR wagon-buffers look excellent, many thanks for those. I have two questions about the buffers. First, what distance are you allowing between the buffing face and the back of the bore for the spring (since this affects the spring rate)? Second, where the buffer bores need to be opened out, what are the inside and outside diameters as printed? Although I have already responded to Guy's question in an earlier post I thought it might be worth going over how to assemble the prints with specific reference to his questions. As supplied the mouldings need to be cleaned of any waxy deposits. If the moulding looks too translucent, the chances are it needs further cleaning. Here are the FUD printed GNR Unfitted buffers after soaking overnight in a warm water/washing up liquid mix, scrubbing with an old toothbrush and drying: The moulding has now been given a couple of blasts with Halford's Filler Plastic Primer. No other cleanup has been performed: At this point I would normally spray them in Halford's Matt Black but in the interests of being able to see them here I have left them in the primer. First off a strip are snipped off with Xuron cutters: Then a single buffer is cut off: Finally the rear sprue is trimmed off exposing the 0.5mm hole: The main bore as supplied in these buffers is around 0.7mm and needs to be opened up to 0.9mm. The resin moulding is quite easy to drill and if you are not careful it is very easy to drill the large hole all the way through (been there, done that). So to play safe put your chosen drill bit into the drill chuck with just the length you want to drill exposed: Gently drill out the main bore and check the buffer head fits: Assemble the head and spring into the buffer body and if all is OK bend the tail of the buffer head using fine pliers as a spacer: Trim off the excess tail: OK using the above method is not terribly accurate so an alternative is to create a spacer out of styrene that will gauge the projection of the buffer head from the body: Check the main stem of the buffer is slightly longer than the spacer: To assemble slot the head and spring through the slot in the spacer and thread on the buffer body, then pressing the body down to the styrene spacer bend over the buffer tail. As you can see here I have held the buffer body (carefully) in the pliers, however a simpler way would be to use another piece of styrene with a 2mm hole drilled in it: A problem you may encounter, especially with short buffers such as these, is once assembled the buffer head no longer retreats fully into the buffer body (you can test this before bending the tail over. This is caused by the spring reaching its maximum compression. If this is an issue for you simply cut the spring in half and if necessary stretch it slightly. To cut the spring, place on a hard surface and using modelling knife slide between the coils and push through. I strongly recommend drilling all the buffer bodies of a particular type at the same time to keep the same main bore depth. 1 Link to post Share on other sites More sharing options...
Nimbus Posted June 8, 2016 Share Posted June 8, 2016 Might be a daft question, but why does everyone have to use Shapeways with their daft postal rates. Is there no one UK based? No chance. They're too fixated on 'apps'. The Nim. Link to post Share on other sites More sharing options...
MikeTrice Posted June 11, 2016 Author Share Posted June 11, 2016 RCH Mineral Wagon buffers in 4mm added: 2 Link to post Share on other sites More sharing options...
davidw Posted June 13, 2016 Share Posted June 13, 2016 Mike would the restaurant vents be appropriatefor the comet models/marcmodel triplet set and th gresley Rf and Rk? Thanks. Link to post Share on other sites More sharing options...
MikeTrice Posted June 13, 2016 Author Share Posted June 13, 2016 Yes, pre BR rebuilds Link to post Share on other sites More sharing options...
Rob Pulham Posted June 13, 2016 Share Posted June 13, 2016 Superb Mike, Can I ask what package you used to draw them? Link to post Share on other sites More sharing options...
MikeTrice Posted June 13, 2016 Author Share Posted June 13, 2016 Blender 3D Link to post Share on other sites More sharing options...
jonny777 Posted June 13, 2016 Share Posted June 13, 2016 Wow. These are great. If this is the future, then I am all for it. Link to post Share on other sites More sharing options...
davidw Posted June 13, 2016 Share Posted June 13, 2016 Yes, pre BR rebuilds Can you clarify further? Was there much difference. I model 1960 +- 2years. Link to post Share on other sites More sharing options...
MikeTrice Posted June 13, 2016 Author Share Posted June 13, 2016 I don't have much information of the coaches during their later lives. What appears to have happened is when/if BR rebuilt various vehicles after nationalisation they removed the old vents as shown in my models and replaced them with a round type (which can still be seen on preserved Buffer Cars). You would therefore need to know for a specific vehicle if it was rebuilt and when. Link to post Share on other sites More sharing options...
davidw Posted June 13, 2016 Share Posted June 13, 2016 I don't have much information of the coaches during their later lives. What appears to have happened is when/if BR rebuilt various vehicles after nationalisation they removed the old vents as shown in my models and replaced them with a round type (which can still be seen on preserved Buffer Cars). You would therefore need to know for a specific vehicle if it was rebuilt and when.Many thanks. Link to post Share on other sites More sharing options...
MikeTrice Posted June 21, 2016 Author Share Posted June 21, 2016 GNR Torpedo vents and gas lamps: Note you can just see the daylight through the vents: 3 Link to post Share on other sites More sharing options...
MikeTrice Posted June 21, 2016 Author Share Posted June 21, 2016 7mm LNER Torpedo Ventilators: 2 Link to post Share on other sites More sharing options...
MikeTrice Posted June 21, 2016 Author Share Posted June 21, 2016 4mm LNER Torpedo Ventilators: Link to post Share on other sites More sharing options...
MikeTrice Posted June 21, 2016 Author Share Posted June 21, 2016 GNR 6 Wheel Coach axleboxes/spring in 4mm: 3 Link to post Share on other sites More sharing options...
MikeTrice Posted June 21, 2016 Author Share Posted June 21, 2016 Assorted NER Buffers in 4mm: 5 Link to post Share on other sites More sharing options...
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