Tim V's workbench - broad gauge tomfoolery

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Tim V
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Re: Tim V's workbench

Postby Tim V » Sun Sep 14, 2014 9:48 am

Class 4 on hold while I build the class 2 - very similar!
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Mike Garwood
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Re: Tim V's workbench

Postby Mike Garwood » Sun Sep 14, 2014 5:41 pm

And not letting go of this particular bone...and the coaches?

On the Ivatt is that the rubbing plate you've soldered in already?

Mike

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Tim V
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Re: Tim V's workbench

Postby Tim V » Sun Sep 14, 2014 6:15 pm

Coaches finished and put away in the stock box, ready for the Woking show this coming weekend!

Yes, that's a rubbing plate at the front, temporarily in place.
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Tim V
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Re: Tim V's workbench

Postby Tim V » Thu Nov 06, 2014 8:37 pm

Currently building signal ladders -those rungs go on and on and on .....
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Tim V
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Re: Tim V's workbench

Postby Tim V » Sun Dec 14, 2014 7:16 pm

Finally getting round to the shunting.
This wagon is immediately behind the loco, and has the same DCC address.
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The motorised wagon is permanently coupled to the second wagon. Reason for this was because the High level motorised wagon is not compensated, and reliable pickup was not guaranteed. Plus there was no room for the Dingham solenoid.
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The shunting sequence goes like this. F1 on the controller lifts the Dingham.
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Engine off left of picture. Train uncoupled and left behind.
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Motorised wagon flicked down siding.
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By using asymmetric DCC, the wagon can be left to automatically slow to a realistic stop. Here are the diodes controlling this.
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Result a success, I can finally loose shunt as it was done on the prototype.
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jim s-w
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Re: Tim V's workbench

Postby jim s-w » Sun Dec 14, 2014 8:46 pm

I'm a tad confused Tim. If the loco and the wagon have the same address how do you stop the loco but not the wagon?

Cheers

Jim

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Re: Tim V's workbench

Postby John Palmer » Mon Dec 15, 2014 9:00 am

I'll reveal my total ignorance about DCC by saying that much the same thought occurred to me: if both engine and wagon are responding to commands on the same 'channel', what stops those Troublesome Trucks setting off in pursuit of the engine when it tries to get away? - "Hey, wait for us!"

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Tim V
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Re: Tim V's workbench

Postby Tim V » Mon Dec 15, 2014 3:55 pm

Sorry, I didn't explain it well.

There are three wagons involved here.

One is attached behind the loco, it has a decoder and an uncoupling solenoid. It has the same DCC address as the loco. This is because there isn't room in the loco for the solenoid. This results in a loco with a remote uncoupler with it.

The other two wagons are permanently attached to each other. They have a different DCC address. There is a motor in one of the wagons, the other has an uncoupling solenoid. Again, there isn't room for a motor, solenoid, decoder in the one wagon, alongside which, the wagon doesn't have compensation so pickup is unreliable.
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steamraiser
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Re: Tim V's workbench

Postby steamraiser » Mon Dec 15, 2014 5:53 pm

So the uncoupling loop in the wagon is the same number as the loco and the motor powering the wagons is on a different number allowing the pair to run as a consist?

gordon A
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Tim V
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Re: Tim V's workbench

Postby Tim V » Mon Dec 15, 2014 7:15 pm

Something like that!
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Tim V
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Re: Tim V's workbench

Postby Tim V » Wed Dec 24, 2014 3:30 pm

A quickly flat battery in my digital callipers has been annoying me for a while. Then a suggestion on the 2mm VAG (Virtual area Group) inspired me to install an on/off switch. It was a fag taking out the battery each time I used it. Now I just put a link over the two pegs. Simples!
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Tim V
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RobM
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Re: Tim V's workbench

Postby RobM » Wed Dec 24, 2014 4:02 pm

Throw those digitals away ;) ……..my imperial calliper from the 1960's is still going strong (OK, so I still work in old money!)………..have gone through 3 sets of metric digitals in the last 10 or so years (broken contacts, unexplained spurious readings……have never trusted them) ……a few years ago I returned to mechanical and all is well….. :thumb
Rob
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Tim V
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Re: Tim V's workbench

Postby Tim V » Wed Dec 24, 2014 5:03 pm

Yes, my trusty mechanical one gets used the most, but I have workshops up here and down in the garage - so I need more than one.
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RobM
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Re: Tim V's workbench

Postby RobM » Wed Dec 24, 2014 6:07 pm

Tim,
Me too…….winter quarters in the spare bedroom…..summer in the garage……..how much do yours weigh to carry down??????…. ;)
R
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Tim V
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Re: Tim V's workbench

Postby Tim V » Wed Dec 24, 2014 7:05 pm

Couple of tons......

Upstairs workshop (with small lathe), in use year round, garage workshop (with the big lathe) when it's a bit warmer!
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dal-t
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Re: Tim V's workbench

Postby dal-t » Wed Dec 24, 2014 9:25 pm

RobM wrote:how much do yours weigh to carry down??????…. ;)


Tim V wrote:Couple of tons......


Dashed big pair of calipers ... what scale are they, then?
David L-T

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Tim V
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Re: Tim V's workbench

Postby Tim V » Wed Dec 24, 2014 9:37 pm

12" to the foot!
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Tim V
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Re: Tim V's workbench

Postby Tim V » Tue Apr 14, 2015 4:01 pm

Further work on shunting wagons. Here is a standard 13T with uncoupling solenoid just visible and the DCC chip under the blue cover. I wont be able to demonstrate these at S4N, as I'm otherwise engaged.
IMG_6195.JPG
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Re: Tim V's workbench

Postby garethashenden » Tue Apr 14, 2015 10:11 pm

How do you get on with the Dingham couplers? I'm finding the constant need for adjustment of AJs increasingly frustrating and have been considering a change.

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Tim V
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Re: Tim V's workbench

Postby Tim V » Wed Apr 15, 2015 4:22 pm

I'm pleased to say, once set up, they don't need adjusting (unlike AJs, which are quite fragile).

However, I've yet to put them through the demands of an exhibition - next outing is Trainwest 2016.
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Tim V
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Re: Tim V's workbench

Postby Tim V » Mon Jun 08, 2015 4:42 pm

As notified elsewhere, I am involved in resurrecting Burnham. I have been passed a Bachman 3F to cast my eyes over.

Well, the rods on one side are OK, but I've failed the rods on the other. The wooden wedges are being used to force the 1/8" jigs to one side of the oversized slot.
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These bearings also enable the wheels to slop around sideways, so that will ruin any chances of decent running. Need some washers or tubes to take out the slop.
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The body looks very nice, should make a useful addition to the stock.
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jim s-w
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Re: Tim V's workbench

Postby jim s-w » Mon Jun 08, 2015 5:38 pm

I'd try a straight wheel swap and see first before you over think things Tim

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Tim V
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Re: Tim V's workbench

Postby Tim V » Mon Jun 08, 2015 5:44 pm

It has already been modified, but it's a poor runner. I'm trying to make it better.
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Tim V
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Re: Tim V's workbench

Postby Tim V » Wed Jun 10, 2015 7:02 pm

Gibson wheels, three rims popped off! Soon glued those on. I've bushed the rods with standard 2mm pin point bearings, drilled out to fit the crank pins, then soldered to the rods.
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JFS
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Re: Tim V's workbench

Postby JFS » Thu Jun 11, 2015 1:12 pm

Tim V wrote:Gibson wheels, three rims popped off! Soon glued those on.


Hello Tim,

Were these new ones or old stock? I had hoped that such issues were a thing of the past...

Best wishes,

Howard


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