Author Topic: Marble Mountain Quarry HOn30 Micro Layout  (Read 573 times)

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cbroughton67

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Marble Mountain Quarry HOn30 Micro Layout
« on: April 01, 2020, 09:22:45 PM »
+1
I'm a member of the Micro/Small Model RR Layouts group on Facebook. One of the group members is a talented layout designer, and he was asked to design a track plan for a micro-layout challenge - one to fit inside a 13" x 9" football display case. After sharing his HOn30 design with the group, two of us decided to tackle building the layout, myself included. #2 turnouts, 6" radius curves, hand-laid track... "challenge" was certainly the operative word. This has turned out to be the most hobby-related fun I've had in a while! The layout is about 85% complete at this point, but I've been taking photos along the way and wanted to share the progress here. Enjoy!

Chris Broughton
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Darwin was an optimist.

cbroughton67

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Re: Marble Mountain Quarry HOn30 Micro Layout
« Reply #1 on: April 01, 2020, 09:23:53 PM »
+1
Here's the design - I've followed it very closely.


Chris Broughton
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Darwin was an optimist.

cbroughton67

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Re: Marble Mountain Quarry HOn30 Micro Layout
« Reply #2 on: April 01, 2020, 09:25:22 PM »
+1
This shows the track plan inside the case. This is also the "template" I used to hand-lay the track.


Chris Broughton
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Darwin was an optimist.

cbroughton67

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Re: Marble Mountain Quarry HOn30 Micro Layout
« Reply #3 on: April 01, 2020, 09:25:56 PM »
+1
Track laying begins...


Chris Broughton
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Darwin was an optimist.

cbroughton67

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Re: Marble Mountain Quarry HOn30 Micro Layout
« Reply #4 on: April 01, 2020, 09:27:13 PM »
+1
The point rails are solid at this point, but I realized quickly that I'd have to hinge such tight-radius turnouts.


Chris Broughton
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Darwin was an optimist.

cbroughton67

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Re: Marble Mountain Quarry HOn30 Micro Layout
« Reply #5 on: April 01, 2020, 09:27:57 PM »
+1
Chris Broughton
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Darwin was an optimist.

cbroughton67

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Re: Marble Mountain Quarry HOn30 Micro Layout
« Reply #6 on: April 01, 2020, 09:28:38 PM »
+1
Track and turnouts complete...


Chris Broughton
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Darwin was an optimist.

cbroughton67

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Re: Marble Mountain Quarry HOn30 Micro Layout
« Reply #7 on: April 01, 2020, 09:30:19 PM »
0
Had to build a base for the layout, so I decided on a 1/8" plywood base. It's about 2" deep, which give enough room for scenic features, turnout controls, wiring, and the turntable gizmo.


Chris Broughton
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Darwin was an optimist.

cbroughton67

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Re: Marble Mountain Quarry HOn30 Micro Layout
« Reply #8 on: April 01, 2020, 09:31:25 PM »
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Here's my turnout control... DPDT slide switch, R/C control rod, and some music wire.


Chris Broughton
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Darwin was an optimist.

cbroughton67

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Re: Marble Mountain Quarry HOn30 Micro Layout
« Reply #9 on: April 01, 2020, 09:32:26 PM »
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Two holes drilled in the slide switch - small one for the throw bar wire, and the large one for the clevis on the R/C control rod.


Chris Broughton
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Darwin was an optimist.

cbroughton67

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Re: Marble Mountain Quarry HOn30 Micro Layout
« Reply #10 on: April 01, 2020, 09:33:00 PM »
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Progress...


Chris Broughton
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Darwin was an optimist.

cbroughton67

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Re: Marble Mountain Quarry HOn30 Micro Layout
« Reply #11 on: April 01, 2020, 09:33:34 PM »
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Base for the 4" turntable


Chris Broughton
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Darwin was an optimist.

cbroughton67

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Re: Marble Mountain Quarry HOn30 Micro Layout
« Reply #12 on: April 01, 2020, 09:35:27 PM »
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This is the turntable itself. I used a small audio headphone plug to both supply power to the turntable track and act as a pivot point for the turntable. The wiring-end of the plug is what you see here.


Chris Broughton
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Darwin was an optimist.

cbroughton67

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Re: Marble Mountain Quarry HOn30 Micro Layout
« Reply #13 on: April 01, 2020, 09:37:48 PM »
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Since the polarity would be off every 180-degrees of rotation, a switch would be needed to correct the polarity to prevent a short between the turntable and the rest of the layout. Being the sole operator of the layout, I needed it to be idiot-proof! So, I came up with the idea of a cam and a pair of roller-switches to flip the polarity automatically. Here's the cam and the plug-end of the audio connector.


Chris Broughton
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Darwin was an optimist.

cbroughton67

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Re: Marble Mountain Quarry HOn30 Micro Layout
« Reply #14 on: April 01, 2020, 09:38:41 PM »
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This shows how the roller-switches will be mounted and engage the cam.


Chris Broughton
MMR #650

Darwin was an optimist.