Re: Tim V's workbench - latest shenanigans
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Re: Tim V's workbench
Trying to use the LED output to drive a buzzer - watch this space!
Tim V
(Not all railways in Somerset went to Dorset)
(Not all railways in Somerset went to Dorset)
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Re: Tim V's workbench
Tim V wrote:Trying to use the LED output to drive a buzzer - watch this space!
If you literally mean an old-fashioned buzzer which uses a solenoid-relay type mech don't forget it will produce large reverse induction spiky voltages that could damage the feeding electronics....buffering is essential from a logic feed that was Ok just for led.
A modern piezo-electric screamer would be safer but check current draw.
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Re: Tim V's workbench
I have a circuit in mind, I will discuss this on Tuesday.
Tim V
(Not all railways in Somerset went to Dorset)
(Not all railways in Somerset went to Dorset)
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Re: Tim V's workbench
Tim V wrote:The lower screw was inaccessible behind the worm wheel!
An annoying situation, agreed.
Where possible, I now mount the motor with the screws right and left of the motor spindle, where this is allowed for (eg. some High Level gearboxes)...
Tim M
Member of the Devon Riviera Area Group.
Member of the Devon Riviera Area Group.
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Re: Tim V's workbench
I completely agree.
This engine was built this way when I removed the Portescap in February 2006. I wouldn't do it this way now.
This engine was built this way when I removed the Portescap in February 2006. I wouldn't do it this way now.
Tim V
(Not all railways in Somerset went to Dorset)
(Not all railways in Somerset went to Dorset)
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Re: Tim V's workbench
Currently down in the Garage workshop, on the Myford making baseboard joiners.
And this is what I'm trying to make.
And this is what I'm trying to make.
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Tim V
(Not all railways in Somerset went to Dorset)
(Not all railways in Somerset went to Dorset)
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Re: Tim V's workbench
Bet you're glad of the Myford's grunt for work like that. And the reason for the steady is?
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Re: Tim V's workbench
Myford limitation, mandrel hole 19/32", piece I'm working on 1" diameter, and I'm working 6" out from the chuck.
Tim V
(Not all railways in Somerset went to Dorset)
(Not all railways in Somerset went to Dorset)
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Re: Tim V's workbench
And here is the result ready to glue in.
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Tim V
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(Not all railways in Somerset went to Dorset)
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Re: Tim V's workbench
Currently being built is a DCC power breaker. I joined MERG recently, and this is my first kit. Gone together very well.
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Tim V
(Not all railways in Somerset went to Dorset)
(Not all railways in Somerset went to Dorset)
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Re: Tim V's workbench
Well, it was so good, I've ordered a couple more. A very enjoyable kit to put together.
Tim V
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Re: Tim V's workbench
I don't know if it made the final instructions for the cut-out kit, but if you put two turns of wire through the coil (its a tight fit with the supplied wire, but slightly thinner could be substituted), the current handling thresholds are halved to 0.75A and 1.5A depending on the jumper setting. This might be useful if using low current motors in locomotives.
I was one of the beta-testers for the DCO kit and this "feature" became apparent during the test builds.
- Nigel
I was one of the beta-testers for the DCO kit and this "feature" became apparent during the test builds.
- Nigel
Nigel Cliffe - Blog of various mostly model making topics
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Re: Tim V's workbench
Not mentioned in the instructions, nor is the wire supplied
Tim V
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Re: Tim V's workbench
Tim V wrote:Not mentioned in the instructions, nor is the wire supplied
Thats because "everyone knows how a transformer works"
Going further 3 turns should trip at .5Amp etc.
Almost any wire will do that can carry the max load your DCC power unit can supply. Enamelled copper wire is good as no space wasted on thick plastic. Just scrape off the enamel at ends for soldering. Diameter of 1mm is fine for 5 Amps.
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Re: Tim V's workbench
Paul Townsend wrote:Thats because "everyone knows how a transformer works"
Oh no they don't!!
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Re: Tim V's workbench
The power breakers have been installed, and now I've moved onto coaches. I've got a couple of the standard B sets in a rather poor maroon colour. Stripped off the paint yesterday, revealing this red plastic. Today I'm cutting open droplights and filling in the excess window. A way to go yet, there are three more bodies to work on.
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Tim V
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Re: Tim V's workbench
Is that Airfix or Dapol in origin, Tim?
I remember stripping the paint on my Airfix pair using brake fluid - they were then moulded in white plastic, I think (like your vents?). To do away with the excess window I separated the window concerned from the rest of the transparency, glued it in place, worked Milliput into the seam and sanded smooth. You can make out where it was on close inspection, but it's undetectable at normal exhibition viewing distances.
Will these sets be to Diag. E140 or E145?
I remember stripping the paint on my Airfix pair using brake fluid - they were then moulded in white plastic, I think (like your vents?). To do away with the excess window I separated the window concerned from the rest of the transparency, glued it in place, worked Milliput into the seam and sanded smooth. You can make out where it was on close inspection, but it's undetectable at normal exhibition viewing distances.
Will these sets be to Diag. E140 or E145?
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Re: Tim V's workbench
I think Dapol. The problem I may have is the white plastic showing through the paint, but I'm thinking of using red plastic scrapings from the rest of the coach to coat the white - we'll see what happens.
The underframes are already done, to E140.
The underframes are already done, to E140.
Tim V
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Re: Tim V's workbench
Ready for spraying, it's a reasonably warm, windless day here. An old record player is used to rotate the bodies.
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Tim V
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Re: Tim V's workbench
Tim V wrote:An old record player is used to rotate the bodies.
78 rpm Tim?
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Re: Tim V's workbench
This record player will achieve that!
Tim V
(Not all railways in Somerset went to Dorset)
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Re: Tim V's workbench
Update on the Ivatt. I'm paying a lot of attention to the motion bracket support, rather weak on the basic Comet kit. Beefed up with a substantial brass block, drilled, screwed, and soldered together.
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Tim V
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Re: Tim V's workbench
dcockling wrote:Tim V wrote:An old record player is used to rotate the bodies.
78 rpm Tim?
Those old wax cylinders are worth a fortune now.....
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Re: Tim V's workbench
Tim V wrote:Update on the Ivatt. [/attachment]
What happened to the Standard class 4 tank update I've been waiting for... And more importantly, is how did the coaches 'turn' out?
Mike
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