N15class Posted August 14, 2014 Share Posted August 14, 2014 Well done Chris!! A significant milestone achieved and new skills learnt. Pickups next? I then leave the brake gear and other frame gubbins until the body is finished. Those thin bits of metal are easily bent when you keep offering the chassis up to the body. Well they are on my workbench :-( . Here we go chalk and cheese. I like to get the frames finished, so I can paint them once I know the two fit together, and start the re assembly process whilst the body is being painted. Link to post Share on other sites More sharing options...
Simond Posted August 14, 2014 Share Posted August 14, 2014 I'd go for pickups next Then brakes & chassis gubbins Then paint chassis Function before appearance IMO Best Simon I'd go for pickups next Then brakes & chassis gubbins Then paint chassis Function before appearance IMO Best Simon Link to post Share on other sites More sharing options...
RMweb Premium Siberian Snooper Posted August 14, 2014 RMweb Premium Share Posted August 14, 2014 I'd go for pickups next Then brakes & chassis gubbins Then paint chassis Function before appearance IMO Best SimonI'd go for pickups next Then brakes & chassis gubbins Then paint chassis Function before appearance IMO Best Simon Simon You appear to have aquired an echo. SS Link to post Share on other sites More sharing options...
RMweb Gold Worsdell forever Posted August 14, 2014 RMweb Gold Share Posted August 14, 2014 Simon You appear to have aquired an echo. SS Or it didn't work and he had to start again... Link to post Share on other sites More sharing options...
RMweb Premium 2ManySpams Posted August 14, 2014 Author RMweb Premium Share Posted August 14, 2014 Until you get the pickups sorted, can you rig up a wagon, coupled to the loco, with temporary wheel wipers to pass current to the motor ? I'm trying to avoid temporary measures Stu, I don't have the time for doing things twice. Saying that, I'll be taking the chassis to prices yet again tonight to look at improving those compensation beams fixings. Link to post Share on other sites More sharing options...
RMweb Gold mudmagnet Posted August 14, 2014 RMweb Gold Share Posted August 14, 2014 Looking great Chris! Achieved without Damian's help! It is very satisfying getting the wheels rolling under power. I'd want to get the chassis more or less finished before moving onto the body. All the fiddly / moving bits are on the chassis and getting these running sweetly are critical, as Paul suggested earlier in the thread. Link to post Share on other sites More sharing options...
RMweb Premium Indomitable026 Posted August 14, 2014 RMweb Premium Share Posted August 14, 2014 Looking great Chris! Achieved without Damian's help! It is very satisfying getting the wheels rolling under power. I'd want to get the chassis more or less finished before moving onto the body. All the fiddly / moving bits are on the chassis and getting these running sweetly are critical, as Paul suggested earlier in the thread. Help? You've got it all wrong. I've never been any help... Link to post Share on other sites More sharing options...
RMweb Premium 2ManySpams Posted August 14, 2014 Author RMweb Premium Share Posted August 14, 2014 Tonight's "progress" so far: Apologies to iPad users that the image is the right way up. 2 Link to post Share on other sites More sharing options...
RMweb Premium Indomitable026 Posted August 14, 2014 RMweb Premium Share Posted August 14, 2014 Tonight's "progress" so far: rps20140814_203840.jpg Apologies to iPad users that the image is the right way up. Git Link to post Share on other sites More sharing options...
Simond Posted August 14, 2014 Share Posted August 14, 2014 Simon You appear to have aquired an echo. SS Not at all sure how I did that.... Best Simon Link to post Share on other sites More sharing options...
RMweb Premium 2ManySpams Posted August 14, 2014 Author RMweb Premium Share Posted August 14, 2014 Wot's goin' on 'ere then? Half way through modifying the compensation beams and pivots. Link to post Share on other sites More sharing options...
RMweb Premium 2ManySpams Posted August 14, 2014 Author RMweb Premium Share Posted August 14, 2014 Clues: 3 Link to post Share on other sites More sharing options...
RMweb Premium 2ManySpams Posted August 14, 2014 Author RMweb Premium Share Posted August 14, 2014 The slop has now gone. Just need to track down a very slight tight spot now. Link to post Share on other sites More sharing options...
N15class Posted August 14, 2014 Share Posted August 14, 2014 Nice work. As for the tight spot if you roll it until it gets to the tight spot you can try sliding the coupling rods on their bearings you will soon find out which pair of wheels id tight. Link to post Share on other sites More sharing options...
3 link Posted August 15, 2014 Share Posted August 15, 2014 If it's any consolation Chris, we have all been there and it's just part of the learning curve. The one thing I think you will find is 7mm is a lot easier to work with and is much less fiddly than 4mm. ATB, Martyn. Link to post Share on other sites More sharing options...
RMweb Premium 2ManySpams Posted August 15, 2014 Author RMweb Premium Share Posted August 15, 2014 My original idea to improve the beam pivots was to find a bit of brass tube that fitted snugly over the screw and to use that as a sleeve between the screw and the beam. I've a small collection of K&S sections but none the right size. What I did find though was a pack of 4mm loco bearings for a 1/8th axle, some 1/8th tube, another tube that fitted inside that and a rod section that fitted inside the smallest tube. Ideas flowed. The screw fixings were removed from the frames, the solder cleaned up and the frame holes reamed slightly to take the small bearing. The collar of the bearing fitted into the recess etched into the outside of the frames. Next the pivot holes in the compensation beams were reamed to take the medium tube. The opportunity was taken to solder some scrap NS over the pivots hole and the cut outs in the top of the beam. I pre-drilled a hole in the scrap to take the medium tube before fixing it to the beam. Lengths of medium tube were soldered into the beam holes - flush with the side facing the frames. Short sections of the large tube were soldered into the bearings, followed by a short length of the medium tube to reduce their internal diameter to that of the rod. The whole lot was then loosely fitted together using the rod and a compression spring used to keep the beams tight to the frames. 3 Link to post Share on other sites More sharing options...
Simond Posted August 15, 2014 Share Posted August 15, 2014 Chris To follow Peter's sage advice, put the coupling rod bushes on back-to-front, so you can slip the rods on and off easily. It will help that you can treat the loco alternatively as an 0-4-2 and a 2-4-0 as your rods are jointed on the centre pin. Don't run it under power! Loosen the gear securing screw, and roll it. It may help if you pull it by means of a long, soft elastic band - which will stretch if the chassis goes tight. Hopefully it will then be easy to identify the tight spot. My guess is that the front four will be fine, and the tightness will be caused by a minor length mismatch between your new compensation beam pivot and your rear axle. If so, I would be inclined to try to re-adjust your new pivot, rather than loosen the coupling rod fit to its bushes, as doing the latter will make the chassis sloppy - the rear axle is driven and will turn before the other wheels, which is exactly how a real loco doesn't look! HTH Simon 1 Link to post Share on other sites More sharing options...
RMweb Premium 2ManySpams Posted August 15, 2014 Author RMweb Premium Share Posted August 15, 2014 Thanks folks, as an unpowered unit it rolls along fine. The tight spot only appears when powering the rear axle. It runs fine as a 2-4-0 under power. The issue appears to be the front axle. Further investigations tonight. Should be easier to sort now the beam pivot points don't wander around so much! Link to post Share on other sites More sharing options...
RMweb Gold Stubby47 Posted August 15, 2014 RMweb Gold Share Posted August 15, 2014 If the chassis run fine un-powered, perhaps you should put the motor in the tender.... Link to post Share on other sites More sharing options...
RMweb Premium 2ManySpams Posted August 15, 2014 Author RMweb Premium Share Posted August 15, 2014 If the chassis run fine un-powered, perhaps you should put the motor in the tender.... That's a great idea Stu - your plan already has the pick-ups there. Sorted. Link to post Share on other sites More sharing options...
RMweb Premium 2ManySpams Posted August 15, 2014 Author RMweb Premium Share Posted August 15, 2014 Found the tight spot...it's the gearbox. The main cog isn't quite round. Found this by noting that the tight spot was always when the cog grub screw was next to the worm, no matter how the wheels are quartered. 1 Link to post Share on other sites More sharing options...
RMweb Gold Worsdell forever Posted August 15, 2014 RMweb Gold Share Posted August 15, 2014 The grub screw could be pushing the gear over, try filing a slight flat on the axle where the screw is and don't tighten it right up. Link to post Share on other sites More sharing options...
RMweb Premium 2ManySpams Posted August 15, 2014 Author RMweb Premium Share Posted August 15, 2014 No chance of further progress tonight, just found that Once Upon a Time in the West is on the gogglebox. Classic movie! "are you a Mexican or a Mexican't?" Link to post Share on other sites More sharing options...
RMweb Premium Indomitable026 Posted August 15, 2014 RMweb Premium Share Posted August 15, 2014 No chance of further progress tonight, just found that Once Upon a Time in the West is on the gogglebox. Classic movie! "are you a Mexican or a Mexican't?" Love the music in that film... Link to post Share on other sites More sharing options...
RMweb Gold gwrrob Posted August 15, 2014 RMweb Gold Share Posted August 15, 2014 The X Factor will be back soon which will be my excuse to do some modelling. B****cks TV. Link to post Share on other sites More sharing options...
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