Tuesday, January 31, 2012

Tracks reach Burlingame... again?

 Well, in fact tracks are already layed here, and trains have already take a trip along the (future) eucalyptus row…. But the train crew claims for an unknow reason …. to have some way to be able to switch the mainline turnouts ! So Espee have to send a “specialist” there to solve this stupid problem.
Well, he uses a lot of wire, a lot of patience, and this is the result: a new panel ( “unfortunately for the purist … incorporating the “underground” section to Mission Yard: a “mystic” yard that a “legend” position in a different place  … )
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Here we can see a part of this “under world” where ( to mantain alive the myth… ) a strange but very effective illumination provided by … Christmass tree LEDs…. give a fogless vision to all Engineers searching the correct parking track!
The entry of the "Under World" at Mission Bay
Curved turnouts


See you at next Flag-stop!

“Iron spike” ceremony at Bayshore-Visitacion

Here again: news from the “track gang”…
Bayshore tunnel and Visitacion Ice facility received at the end all his tracks and the “gang” installed also all turnouts, servos and wired a “decent” switch panel.
North end : tunnel exit
South end
At this point the main goal was to have the line working and trains rolling, and I’ve take a “short path” to implement the panel from the planned one:
Panel was made using 5 mm Forex, then I drill all holes for the Tam Valley Fascia controllers, installed all board  and wires and lastly I print the panel on 120 grams paper ( using 3rdPlanit) , drill holes with a paper hollow punch and …. That’s all, folks!
To drive the turnouts servo ( see a previous post on this blog ) I use Tam Valley Octopus card.
The last Duncan’s firmware was very good, and the automatic search of the end-point is working very well, given the Fasttracks turnouts need a hard push to points rails.
My only disappointment was the practical useless of this feature when I’ve try to command two turnouts with the same output ( as in crossovers ).
But I “guess” is my fault given my “imperfect” handmade turnouts have different tolerances.
Well, I use one-to-one commands: this just need some additional attention from the crew, but maybe add some more prototypical fashion to the game: switch each turnout one at time and pay attention to the next in the path.
The gang was send to Burlingame for the next upgrade of the line!
Later.....

The born of a twins couple


Hello friends,
ultimately I’ve not post any progress …. as I’ve not see really relevant progresses!
BUT …. As already stated, ultimately I can’t have a complete day to spend on the hobby, so I’ve adopted a little steps policy, and here is an update, at the end!
A “twins” couple: handmade double crossover
I’ve plan to use a couple of these combination along the right of way : one in SF before the curve at Mission and the second on the entry to Newhall ( Santa Clara ) yard.
I must say “nothing complicated” (as the double slip, for instance) but not trivial for sure, despite the use of FastTracks jig. The trick adopted to make two sections and then combine them .... well, maybe because it's the first, but made me sweat a bit! FastTracks instructions are “very HO pointed” .
Obviously the photos are on a just completed item, I still need to paint the sleepers and rails, but I hope to give you the idea anyway.
Well, next upgrade have take place at Bayshore-Visitacion .... Follow me :)

Tuesday, April 26, 2011

Adopting a "little steps" policy ...

I’ve take a decision: force me to dedicate half an hour of my time everyday ( well, “more or less” everyday) to advance on my layout. That’s the only way to see something moving, given a sad event to my mother-in-law that make like impossible for me to have a whole afternoon during weekends. 
This “little steps” approach demonstrates “very” effective ( you remember the Esopo story about the fox and the grapes? )
Anyway: I’ve finish to wire the DCC track power bus on the two intermediate peninsulas and done with one of the command panels at Burlingame!
To finish the panel I draw it in 3rdPlanit as show, and will print on a transparent adhesive sheet ( pay attention to select a "proper" sheet... if you've a Laser printer and don't want throw away it).

The electronic driver board is one of the “old” Octopus from Tam Valley with fixed angle servo driver ( I’ve another two and want to check if I can use for turnouts or I’ve to relegate to drive in the future a semaphore blade or other animations). The main reason I doubt was my Fast Tracks point: it's very hard to hold in position.
Experimenting some different solutions for the music wire lever, I turned out with a solution as described in this past post: http://valleybeforesilicon.blogspot.com/2011/01/modified-actuator-for-servo.html

Note a short piece of code 55 rail on top of the throw bar that hold the moving wire. I weld it and then made a slot with a Dremel abrasive saw.
This way I use the elastic wire play, to hold firmly the point rail against the side rail leaving the servos to reach his programmed angle. I’ve add to the octopus 8 relay to switch the frog polarity.
See this short movie of the result. To hide the actuator wire I plan to cover it with a replica of the pneumatic actuator that was used on the peninsula Coast line at the time ( and till now too! See this picture taken at 3rd ...OPS... 4th&Townsend in the City):


On the command panel, made by a Forex sheet, I’ve used DPDT  switches (double pole) connecting one pole to the Octopus input and using the second to light a pair of Led indicating the valid route on the front fascia.
I use rectangular LEDs ( mainly ‘cause I’ve already have a bunch of it) but at the end the visual effect … was better than the “classic” ? To fit the leds just drill a couple of holes with your Dremel tool, then file with a little file (Oh, my poor English!) to obtain the squared corners.
Ok, here a short movie of the "thing":



Tuesday, January 11, 2011

Modified actuator for servo



Sorry, friends, but I’ve not found any time 'till now to add a proper description to the movie:
Now It’s time!
I always dislike the arched movement given by the “usual” mounting of music wire on Tortoise and Blue Point actuators, mainly ‘cause on the center point of the movement the wire is out for some part and at both end-points is level with the throw-bar.
Additionally I want to be able to mount everything from the track side, as in some point I don’t have comfortable space from under.
So, ( I know I’ve re-discover the fresh water!) here is my solution:
-          take a 1,5 mm diameter brass pipe and cut 1mm + your roadbed deep +  your plywood deep + 2cm (for me means 5 cm )
-          Take the music wire ( flexible 1 mm) and bend it at 90° at one extremity, leaving 1cm to connect to the throw bar.
-          Make a hole in the plywood at 1 cm from the throw-bar and
-          Insert the pipe in the hole and insert the wire in the pipe.
-          Bend again at 90° on bottom side using the end of the pipe
-          Cut the wire at 4-5 cm from the pipe.
-          Solder a little “U” part ( I’ve used a pin used to hold resistors I’ve spare, but … well check your “maybe can be useful in the future”  box for something that can fit your wire and act as support
-          Fit the upper end of the wire into the “U” on the throw-bar.
-          Take your servo – fit a piece of strong double side tape on the larger side, to firmly stick the servo on plywood.
-          Insert the wire in the servo arm and position the servo aligning the motor perpendicular to the pipe ( in parallel with the turnout throw bar. It don’t need to much precision as the movement is ensure by the flexible wire arm.
That’s all, folks! And … it’s working well too. The strength needed to force the points to side rails is ensured by the ample swing of the servo arm ( program it at 150° or more)

Monday, April 26, 2010

Simple.... but not too much!

This weekend I don't have so much time to complete my first double slip, but, after some errors and remake.... here we go!
 I can say "now" I really understand why prototype RRs chose to lay down two standard turnouts instead of a double slip, except if space is a big premium!
Last step will be ... cut the points rails just in place... and fit a half rail joiner to act as a hinge.
Well, we will see how ( if ?) it works in the next post.

Friday, April 23, 2010

Rails nigthmare? Make it simple with FT tools!

Referring to this layout , one of my friend said : "How's proceed your "boat" costruction downstair?"
Well, to demonstrate that I not only like woodworking.... and to satisfy Ricky query about my double slip.... here is the first slip still in progress:


Last two pictures are just to compare the Slip with a corresponding #6 simple turnout.
Enjoy

Tuesday, April 20, 2010

A tiny silver spike : first turnout down

Last weekend the "Chief Superintendent" (aka my wife) leave me free, so I spend an entire half of the day downstairs! It was a very productive time!
Install the Backdrop on the walls back Menlo Park up to Palo Alto: do this job as lone wolf, believe me... not simple nor comfortable! But, this is the life... when you've time... no friends around!
Then some refinements on the lift bridge: retaining walls and a lock.
Then finish to install all "thin hills" along the Bay....

And finally.... why not some tracks?


I've solder "off-line" 3 #6 turnouts made using a Fastracks jig , cut some ME Flex tracks and test fit the Visitacion icing facility.
I'm still waiting the curved turnouts jig I've order two months ago so I can't start from the main line and I decided to wait to glue down tracks as soon I can test fit all turnouts.
I ended this nice day after lunch.... starting my first #6 double slip ( well better to admit... "re-starting" as my first one was destroyed by my "sweet" cats! )