I don't think you'll get 4.5mm, you might get 3mm but not by extending the hole outward toward the edge of the tie bar, I think it would weaken it. You would also have to be careful not to over thin the sides of the extended hole as that to might weaken the tie bar and potential cause the plastic to tear over time.
I'm not saying it couldn't be done. I suspect it could but it wouldn't be my preference just because of the potential for damaging or weakening the plastic throw bar.
You could replace the throw bar with something stronger but that's another whole level of micro engineering or hand laying that Bodgit and Scarper aren't ready to embrace yet! :roll:

I agree Marty,
You don`t want to be toying with the tie bar.
Better to get the hardware underneath sorted out or adapted to suit.
Your dealing with micro measurements there unfortunately so I wish you luck.
:cheers  Gormo

Thanks Gormo, so fine in fact that dropping a washer on the pivot screw for the linkage… and then trying to pick it up afterwards caused no end of consternation…. to put it mildly :lol:

cheers
Marty

and I thought all that blue was just smoke,,
:thumbs;-):cool:

It works…it works…who hoo!

Now for the other one.






Marty

[user=19]Marty[/user] wrote:

It works…it works…who hoo!

Now for the other one.





Marty

Another Gormo ???

well done Marty :thumbs

… And that's number two operational… Had to tweak it a couple of mm to the left and drill a second hole in the base plate to re-fix it to the base board as it was binding a little and failing to throw the point consistently.

Both motors have had a tiny drop of lubricating oil on the actuator bar and onto the pivot screw and washers to facilitate movement.






Now onto running the bus wires…

Marty

[user=606]Sol[/user] wrote:

[user=19]Marty[/user] wrote:

It works…it works…who hoo!

Now for the other one.





Marty

Another Gormo ???

well done Marty :thumbs

He's certainly going to have to take responsibility for showing the way, there is no way that this would have been attempted without his (and others) posts and videos.

:cheers Gormo…


…and I've got the cricket to listen to later on… Not sure if that's a good thing though.

Cheers

Marty

Well done Marty and as Gormo said micro measurements as well :thumbs


Ed

Well done from me as well, sorry about the cricket Marty (:lol:)

Cheers
Ron

as they say you live and learn,great stuff,good about the oil bit as Seeps are prone to sticking without it,
:thumbs;-):cool:

Thanks Ed, I'm using a micrometre, callipers and my Optivisor, only way I can do it.

Cheers Ron, I haven't (quite) given up on the cricket yet.

Hi Owen, something I picked up for the forum a long time ago, Jeff mentioned it I think, all of my point motors get a drop of oil on them when they go in, makes a difference to their operation and longevity.


You lot, like me, must be a little weary of soldering and point motors too, so I've weathered up a 37/0 class, given her a test run on the layout and snapped some ID shots for the records.


37254 in BR Blue is here coming out of the tunnel that pierces the scenic break between the layout and the cassette yard. The bridge crosses the Afon Teifi near Pentrecourt Halt.






… and a little further down the line we catch up with her crossing the farmer's occupation bridge just before the halt itself.






Right… back to soldering droppers on Llandyfroig Junction…


Marty

Like the bridges and scenics Marty !:)

Cheers
Ron

Thanks Ron,

That bit of the railway is near the layout room door and presents a "completed" view to me, visitors and Tracy when the door is open. It's nice to look at when I'm soldering wire 145 of the day!

Still bits and pieces to do in that section but it's detailing that can happen later on.

Steady progress is being made on the wiring on the Llandyfroig Junction plank in the evenings after work.

The first of the relays is in and has been tested and declared operational as far as frog switching goes.

A big shout out to those that have gone before and shown the way here on this forum and elsewhere, this is the first point on the layout that has ever been modified for frog switching and it's something that would never have been attempted without your help.

The relay has 4 poles,
One for the frog polarity switching,
One for control panel LEDs
One to interlock straight line signals and
One to interlock deviating line signals

Only frog polarity is connected at the moment, the rest will follow in due course..





This long view shows the state of play after last nights efforts.
On the right is the soon to be demolished Teifi Sidings that will be replaced by the Junction plank.






Cheers

Marty

There is some very inspired stuff going on there, Marty.  :thumbs

cheers Max, trying to keep my wiring neat too :???:
Marty

[user=19]Marty[/user] wrote:

cheers Max, trying to keep my wiring neat too :???:
Marty

and you have too,job jobbed,:doublethumb
:thumbs;-):cool:

Hi Marty,


great stuff going on. I love the 37 it really looks the part. the scenic ……. well what can I say. A class of their own as usual.


cheers


Toto

Great Stuff Marty,
I like the scenics and I`m impressed with the wiring…..much neater than mine:oops::oops::oops::oops::oops:.
Aren`t relays great……I love `em…..I`ve still got a bunch of them to be used…..very useful little Gizmos.
Well done as usual……:thumbs:thumbs:thumbs:thumbs

:cheers  Gormo

G'day Owen,

So far so good, lots more wire to go on yet, we shall see.

Marty