Saturday, June 24, 2017

A Holiday Observation and Other Things

Well, the sheep finally got tired of watching the trains go by and decided to have some lunch.

Train watching
Time for lunch
On our recent caravaning holiday to South Australia, it became obvious as we saw paddock after paddock, that 99% or more of the sheep were busy head down, grazing and I realised that I had to do something about it.

Once back home I fired up the computer and turned to my latest favourite modelling tool (as if you haven't noticed). I spent some time 'converting' a standing, head up sheep to a grazing one. It is just lucky that the sheep couldn't feel anything as I cut its head and neck off at the shoulders and swung it downwards. That was the easy part, I then had to fill in the gap caused and some hours later it was done.

Once the trial print sprue of 64 White Strong and Flexible sheep arrived from Shapeways I sprayed them with my dirty sheep colour, Tamiya XF57 Buff. This was followed up with Model Master Skin Tone - Tint Base for the face and the lower legs (below the knees as the wool doesn't grow there). At this stage I snipped the sheep from the sprue so that I could more easily paint their rear end with Model master Dark Tan (either observe or think about it). Now both Model Master paints were thinned with some acrylic solvent so that the colour would not be so strong and would flow and blend with the base colour. I make my acrylic solvent with about 70% methylated spirits and 30% window cleaner.

While the last two colours can be seen with the naked eye they haven't shown up in the above photo so perhaps I was being a little too subtle.

Anyway I am very happy with them and have ordered another sprue of 64 grazing sheep and they are now available from my Shapeways Signals Branch shop.

What about the heads up sheep? Well they will be going into the stock race yards when I build them as there is nothing to eat in the yards.

More Brass Signals

Since my last news about the brass signals I have been busy and now have 15 brass signals on my shop along with the appropriate White Strong and Flexible bases that the signals plug into.

I have listed them them here but please go to my shop to see them.

  • 16 ft post signal with 1 Siding Arm and other detail parts

  • 18 ft post signal with 1 30 inch Arm and other detail parts

  • 18 ft post signal with 1 30 inch Arm + 1 Siding Arm and other detail parts

  • 23 ft post signal with 1 36 inch Arm and other detail parts

  • 23 ft post signal with 2 Siding Arms and other detail parts

  • 23 ft post signal with 3 Siding Arms and other detail parts

  • 27 ft post signal with 1 39 inch Arm and other detail parts

  • 27 ft post Distant signal with 1 Distant Arm and other detail parts 

  • 27 ft post Home and Distant signal with 1 Home and 1 Distant Arm and other detail parts

  • Left Hand Offset Bracket  signal with 1 36 inch Arm and other detail parts

  • Right Hand Offset Bracket  signal with 1 36 inch Arm and other detail parts

  • Left Hand Bracket  signal with 1 39 inch + 1 30 inch Arm and other detail parts

  • Right Hand Bracket  signal with 1 39 inch + 1 30 inch Arm and other detail parts

  • Inverted or Underslung Bracket  signal with 1 39 inch Arm and other detail parts

  • Scarborough Siding Bracket signal - no Siding arms.

  • Sprue or 4 Siding arms, 2 Calling On arms, 2 Shunt Ahead Arms and 2 Wrong Road Arms.

I have just ordered an Inverted Bracket in Brass for my layout as the train drivers will have a sighting problem under a road bridge at Cox's Gap if a normal starter signal is used. I also wanted to get an order in before this GST change started for online overseas orders on 1 July 2017. I don't know how Shapeways will handle this although they do apply VAT on British orders.

If ordering the bracket signals then be careful as the view that the Shapeways system has put up is from the rear so the left bracket looks like a right and vice versa. Read and go by the model name. I have tried to change this but all I can do is change the orientation of the view that you get on the next web page once you have clicked on it.

As may have been noticed, there is one 'odd ball' signal among the fifteen and that is a bracket signal that was in the sidings at Scarborough on the Illawarra line. This signal was done for a friend and has been made available on the 1 in 1000 chance that someone else would want/need it. The bracket is unusual as it has two dolly posts and no main post above the landing, one dolly post is in the usual position on the outer end of the landing and the other is in the middle of the landing, very strange.

I will be doing the small brackets that held the small centrally pivoted siding signals that were attached below the main signals and these will be in brass. There seems to have been three variations of the brackets, an early McKenzie and Holland somersault type, a cast iron one of the Byles type and a fabricated one. I will do all three and probably put multiples of brackets and arms of each type on a sprue of each type. These will be done with a peg that will allow them to be mounted on White Strong and Flexible (WSF), Frosted Ultra Detail (FUD) and Brass signal posts by drilling a hole in the post where required and glueing or soldering them in place. These will be operational but the operating rod will be bent in a 'Z' shape as there is no way that the actual mechanism could be workable, too small. If you aren't sure what I mean by a Z shape then turn it on its side (sort of).

Of course I still have to draw up some more steel post signals including bracket signals, does it never end?

It is lucky that I enjoy the creative process as another form of modelling.

Oh, yes, here is something I did for a friend, a funnel for a H Class 17 Class Post 1924 re-classification). Something else that will have only limited appeal.

I have made it available in Frosted Ultra Detail, Frosted Extreme Detail and Raw Brass, I suggest that the brass version although more expensive will be the one to go for as the top of the early funnels were polished brass.

Ok, that's all for now.





Monday, June 12, 2017

Signals Branch Pricing Update

Well, after waiting for a couple of weeks on tenterhooks it seems that about 95% of my signals and other items on my Signals Branch Shapeways shop are cheaper!

We were away on holidays in our caravan when the pricing was updated by Shapeways (see previous post) so I wasn't able to have a really close look until we returned. I spent all last week going through things item by item and re-drawing several to reduce the price.

Several items went up but even those mostly weren't too bad. The largest price hike was US$30 for the set of 18 Werris Creek Station Awning Posts and Brackets in Frosted Ultra Detail. The pricing change as outlined last post related to Shapeways pricing in the waxy support material used in the FUD printing process to support any cantilevered parts. Of course the posts with brackets look like palm trees so a lot of support material would be used from the printer base upwards to the brackets, etc.

The answer was to turn them upside down and remove the supporting sprues on the bases of the posts, unfortunately, while the price dropped it was still too expensive. Strangely by doing the same to the set of 6 posts and brackets that are also available they worked out very well and as a result I have removed the set of 18 from sale as 3 lots of 6 works out only about US$5 more than the original price of the set of 18.

I hope all that makes sense and I give this information here to show some of the re-adjusting caused by the re-pricing. Incidentally, I had actually sold two lots of the 18 posts and brackets prior to the re-pricing which was nice as I wasn't sure if the Werris Creek bits would hold too much interest.

Also re-priced was the Precious Metals of which Raw Brass is a part. I was quite worried by this and had calculated that the two brass signals I had just added to the shop would go up by AU$7 - AU$8.

It seems however that I got the calculation wrong as the signals have dropped.

On the Signals Branch shop the 23' timber post signal and details bits was US$49.95 and is now US$44.50 while the 23' steel round post signal and parts was US$45.95 and is now US$39.95.

At the current exchange rate the two signals with the White Strong and Flexible (WSF) base mechanisms and FUD ladders work out at AU$79.50 for the 23' timber signal and AU$73.40 for the 23' steel signal (less brass).

There is always a 'fly in the ointment' though'.

Although not on the shop as yet, the Werris Creek platform starter bracket signal Raw Brass printing price went up by US$11.00!

If I can, some careful design investigation to try to keep the price down will be required for the other steel bracket signals.

The brass C32 tall 1907 sand boxes went down in price by US$4.95.

The brass counterweight levers and bracket signal bell cranks also dropped.

I have to stop here as there are too many to list, so go and have a look at the new prices.

Of course I have stated the US$ prices here mostly as the designers only get to work in US$ and the AU$ price varies with the conversion rate.

Incidentally, Shapeways only adjust the conversion rate once a month but I don't know when.

Tuesday, May 16, 2017

Brass Signal Update

I have almost finished the brass 23 foot lower quadrant timber post and 23 foot lower quadrant steel post signals, only requiring the 'glass' spectacles to be added with Krystal Klear and Tamiya clear tinted paints. If ordering these brass signals a White Strong and Flexible (WSF) base mechanism and a ladder need to be ordered to complete them. The platform safety rails are to be made from 0.015 inch phosphor bronze or brass wire.

Current total prices including the extra parts are about AU$80 for the timber post signal and AU$74 for the steel post signal. Prices of taller, shorter and bracket signals will vary due to the amount of brass involved. These two signals are currently available from my Shapeways Signals Branch shop.

While writing this post I received two emails from Shapeways announcing pricing changes for Frosted Ultra Detail and Raw Brass 3D printing. The changes come into being on 22 May for the Raw Brass and 25 May for the FUD. Apparently smaller brass items will go down in price and larger will go up, of course signals are large!

Of course any FUD items on my shop will change in price as well, which way up or down, I don't know at the moment, the FUD formula is difficult as it involves a calculation on the amount of support material used for each different item and some other factors. I will be informed of the actual price changes for my items on 22 May 2017 for Raw Brass and 25 May 2017 for FUD. Apparently Shapeways will adjust the prices automatically and then I will have to review and adjust prices accordingly,

I have used the supplied formula to calculate the new Raw Brass prices and they are:

23 ft LQ Timber Post Signal - Approx. AU$87
23 ft LQ Steel Post Signal - Approx. AU$80

Be aware that the prices on the shop are in US dollars.

So if you want to save a bit of money then buy the brass signals now before 22 May 2017.

Annoying!

Werris Creek UP Platforms Bracket Starter Signal

Also just needing the 'glass' added is the Werris Creek UP platforms bracket starter signal, this one was a real challenge! I had previously had it printed in Frosted Ultra Detail (FUD) acrylic material but I felt that it could easily have been broken by a clumsy arm reaching across the layout. The problem was that the upper bracket area is supported on the thinnest part of the tapering post. I then had to re-draw it for brass as the minimum design limits are slightly finer for the FUD material.

This pilot model of a steel bracket signal has the detail parts and signal arms on the dolly posts done in FUD with the posts being 1 mm Albion Alloys brass tubing, 1 mm rod would work equally well. I will be looking at how to print the two dolly posts in brass but the advantage of using the FUD parts and the tubing or rod is that you can decide what those dolly posts are like. Further thought required.

Given the just announced pricing changes from Shapeways, I have not been able to calculate an approximate price as yet because the FUD formula is difficult. The likely price before these changes using the FUD parts but not including the brass rod/tubing was going to be about AU$112.

If you are going to the Modelling the Railways of NSW Convention at Loftus this coming Saturday 20 May 2017 you can see these signals and others as I will be doing a clinic on building my signals.

Anyway, here are the signals, price changes aside I am very happy with them.

23 ft Lower Quadrant Timber Post Signal - Brass

23 ft Lower Quadrant Steel Post Signal - Brass

Werris Creek UP Platforms Bracket Signal - Brass




Sunday, April 30, 2017

Brass Signal Assembly Instructions

I have put a link on my Signals Branch blog for the assembly instructions for the new range of brass NSWGR signals.

The instructions can be found in the Links section on the right hand side of the web page and here.


Tuesday, April 25, 2017

Latest Effort - Werris Creek Platform Starter Bracket Signal

In line with my recent work on brass signals (last post) I have redesigned the Werris Creek platform starter bracket signal and had it printed in brass. This 3D printed signal was received a couple of weeks ago, prior to my last post.

Here are a few photos of the model as it stands today.




I have painted one signal dolly post for the photos in this blog post but I will be stripping the paint off and spraying the whole signal with some self etch black which will prime the brass and be suitable for the black parts. Of course painting white over the black will be interesting as it will have to be done by brush, carefully.

The prototype signal does not have bellcranks to transmit the signal box lever movement via wire to the signal arm and uses wheels instead. I designed the signal to have working wheels (drilled with holes to be a bellcrank) to get the operating rods up to the signal arms however they are just too small and fiddly to fit. In future the wheels will be cast in place (non-turning) and the operating rods will be bent to run behind the wheels.

To get the operating rod movement I used one piece of 0.015: phosphor bronze wire from the below baseboard mechanism to the counterweight lever. I bent it to replicate the operating wire of the real signal and threaded it through the wheel brackets behind the wheels. Check the photos to see what I mean. A loop of 0.010" wire was bent into a U shape and soldered to the post to retain the two operating rods and minimise flexing of the wire.

The brass post is glued to a boss on the top of the White Strong and Flexible, the square base of the post being hollow.

The two round steel dolly posts are 1mm diameter brass tube from Albion Alloys which can be purchased from Hobbyco, Bergs Hobbies, Brunel Hobbies and Frontline Hobbies. The detail parts on the dolly posts are Frosted Ultra Detail parts that slide onto the posts. The dolly posts fit into holes printed in the signal that need to be cleaned out with a 1mm drill.

Some holes need to be drilled with a 0.4mm drill, some cast OK and some don't. A supply of 0.4mm drills would be useful as I find that some drill well and others don't. I think it is how well the point has been ground.

The drills can be found on ebay or a pack of 10 drills can be had for $10 from McJing Tools in Yagoona NSW.

I will be investigating how to do these dolly posts with details attached in printed brass. I have to keep the height below the 100mm maximum build box of the 3D printer, so some more 'hidden' sprues.

This signal is a trial for the steel post bracket signals to go with the round steel post signal now available on my Signals Branch Shop.

Once this signal is done I will return to the Werris Creek station building, at last - again!

If anyone is interested in how my signals go together I will be having a clinic at the Modelling the Railways of NSW Convention at Loftus on 20 May 2017.



Wednesday, April 19, 2017

Brass Signal Update

Since my last post about brass signals I have added the rest of the signal parts to the post and the 23 ft timber post signal and a new 23 ft round steel post signal with parts have passed the technical review by Shapeways and are being printed.
These two signals are now on my Signals Branch shop.
Update: Signals printed and on the way as of today 25 April 2017 and Shapeways Sale information removed from this post as it was over.
Brass 23 ft Round Steel Post Signal with Detail Parts

Brass 23 ft Timber Post Signal with Detail Parts
I have also added NSWR C32 Sand boxes in brass, Frosted Ultra Detail and Frosted Extreme Detail acrylic material. These larger 1907 sand boxes have been designed to replace the smaller sand boxes of the Ixion C32 as outlined in an article by James McInerney in April 2017 Issue 323 of the Australian Model Railway Magazine.
Brass C32 Sandboxes for Ixion C32 - Also available in FUD and FXD
I will expand the range of brass signals as soon as I can.
Of course the appropriate WSF mechanism and a ladder are required for each signal.

Wednesday, April 12, 2017

A Couple of Things I have been Battling Against

OK, the title is just to catch your eye, no life dramas.

Firstly, I have been working with a Shapeways Service Team member over the brass signal situation and after about a dozen or so emails back and forth and a few more designs it looks like I have made a breakthrough. There is a trial brass signal currently on its way from New York. There are actually four of the same design coming, three for a friend who helped out as I wanted to test the print success rate and one for me.

The breakthrough came when I removed the rectangular base from the brass signal design. I finally worked out that the Shapeways production team for brass don't really like the designer to have sprues as a badly placed sprue to a part can cause the process to fail.

So the signal will comprise a brass post with platform, lamp, signal arm pivot, counterweight lever pivot and a counterweight lever attached by a very short sprue to a small square flange near the base of the post. This flange retains the post when it is pushed into the White Strong and Flexible mechanism that just happens to also have a rectangular base for mounting.

Unfortunately I wasn't able to include the signal arm, cast iron ladder base, lamp top and signal arm rear blind.The good thing is that the counterweight lever is brass so it will be stronger than the Frosted Ultra Detail (FUD) acrylic version although

These extra detail parts will have to be ordered in FUD from the existing range of FUD parts. One advantage of this is that the appropriate signal arm can be chosen whereas if it is in brass I would have to decide which arm to include on the brass signal.

A ladder will be needed and I have a sprue of two (without cast iron ladder bases) or a sprue of ten ladders with the cast iron bases. Of course an etched brass ladder can be used instead.

So the brass signal got cheaper without the rectangular base but the addition of the FUD parts took the price back up to about the same price as an all brass signal post and parts.

Here are some computer renders of the various items:

HO Scale 23 Foot Brass Signal Post
WSF Brass Base and Signal Mechanism
HO FUD 2 x 36 inch Signal Arms and Detail Parts
HO FUD 2 x Ladders (No Cast Iron Base)
HO FUD 10 x Ladders with Cast Iron Bases

The signal and others will be available once I make the coming signal, I will announce this at the appropriate time.

I will be doing a demo/clinic about making my signals, etc. at the coming Modelling the Railways of NSW Convention at Loftus on Saturday 20 May 2017.


Short Circuit!

The second thing I have been struggling with is a short circuit in my layout that seemed to start at the time of the 40 degree Centigrade days here in Sydney a month or so ago.

I did all the usual things such as looking for rails that had closed up around points, etc. to no avail. I then began disconnecting the DCC track bus wiring to various parts of the layout, still no luck.

Part of the problem was that I was supposed to have two track power districts but didn't! I had a sneak path between the districts that was confusing things. After a few weeks I eventually found the sneak path which was up behind the fascia at Coxs Gap at the dividing point of the two 'districts', it was some original wiring that went from one end of Coxs Gap loop to the other.

After many discussions with Marcus Ammann I tracked the problem down to one section but the short had degraded to a power drain and has now become intermittent.

I now have three power districts with NCE EB1 circuit breakers on each district and the problem is restricted to one of the districts.

The layout was turned on for most of today without any issues.

Now I wait and see if it will raise its ugly head again.