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Swanley Junction - Large four track 4mm Southern electric DCC (30' x 12')


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Not much to report on last night's activities suffice to say the point servo and mount worked on our power supply. The assembly has been taken home by a club member to try hooking it up to the software.

Track building and wiring carried on a pace, labelling is being installed as we go along.

 

Martin

 

file_zpsab79c567.jpg

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Hi Martin.

Watching this with interest. I bought one of the servo brackets last year when I joined the MERG group but not got around to putting it together yet. Your pictures will be a great help.

What are you using to control the servos? Something from the MERG range I guess.

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One or two annoyances emerged when trackbuilding on Wednesday night. We have acquired some of the new peco "coupling sections" which allow you to join code 100 and code 75 rail; much better than the brown adaptor fishplates - but only if you are continuing with peco track, as the sleeper height on the code 75 section is increased to balance the decrease in the rail section. So we have had to take out some code 100 sleepers at the end of each fiddleyard road where they join the points.

 

Did manage to make a start on building a point though - only another quite a lot to go :no:

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Hi Martin.

Watching this with interest. I bought one of the servo brackets last year when I joined the MERG group but not got around to putting it together yet. Your pictures will be a great help.

What are you using to control the servos? Something from the MERG range I guess.

We are controlling using the MERG CANSERVO8C software, which will be running on the boards we have ordered from China.

 

We tried it with the mounted servo yesterday, and it works really well - you can easily adjust the endpoints and servo speed with a PC, and once setup, it just seems to work.

 

Martin

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This week's update.

All the straight fiddle yard boards were erected, plugged in and some locos run the whole length, all worked a treat.

 

file_zps6b842d0a.jpg

 

These are the inter board connectors we are using, when disconnected they are held by a clip under the board.

 

file_zpse19eeaec.jpg

 

Here is the power box and one of the handsets.

 

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A close up of one of the handsets.

 

file_zpsfaf5d6f5.jpg

 

This is the proving board for testing all the detectors and controllers to make sure it will work, which it did :)

 

file_zpsa8038254.jpg

 

This is the TOTI board with a short piece of segmented track, just touching the track with a finger lights the LED.

 

file_zps618bc9c5.jpg

 

This is to represent some mimic panel indicator LEDs, these change with TOTI instructions as well as point motor position.

 

file_zpscd9dc5b7.jpg

 

These are some switches emulating route setting for the fiddle yard.

 

file_zpsde467d1b.jpg

 

When the switches were pressed these servos activated to represent each point changing.

 

file_zps36fc1c29.jpg

 

This will now be rolled out to all the boards as required.

Delivered this week were 40 of the MERG servo mount kits, someone is going to be busy the next couple of weeks.

 

Next on the list for development is JMRI to control the colour light signals, some of which will be auto switched in the correct sequence a s train approaches/departs a section.

 

Martin

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  • 4 weeks later...
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Latest progress is a fiddle yard board wiring is complete along with TOTI working as it should, now on with the rest.

 

file_zpsc53fea55.jpg

 

Also under construction are the 40 laser cut servo mounts.

 

Martin

Hi

 

What are the components between the terminal block screwed to the layout and the outputs of the CANToTI and what are they for?

 

Cheers

 

Paul

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Hi

 

What are the components between the terminal block screwed to the layout and the outputs of the CANToTI and what are they for?

 

Cheers

 

Paul

Paul,

 

They are PTC fuses or Poly fuses, they basically help when a short happens to keep the rest of the layout going.

 

Martin

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Further to what Paul asked about the Poly fuses, from tonight's session, here we have three sound equipped locos to give a good current draw while we short out a set of rails to test the rest kept going and our circuits and wiring are up to spec.

 

 file_zpsd60169e7.jpg

 

Tonight we programmed up some of the boards and checked the event reporting to make sure all was working correctly.

 

file_zpsa668b7b3.jpg

 

On another bench, batch building TOTI boards.

 

file_zps8236b2a8.jpg

 

Martin

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A slight correction to the last picture.

 

The boards are "CAN_FLIM_IO_A"  which are being built to be equivalent to a MERG CANACE8C.

The board takes 8 inputs and connects to the MERG CBUS.

The surface mount TOTI board drives the inputs of the CAN_FLIM_IO_A board.

 

Regards,

Ian H

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A slight correction to the last picture.

 

The boards are "CAN_FLIM_IO_A"  which are being built to be equivalent to a MERG CANACE8C.

The board takes 8 inputs and connects to the MERG CBUS.

The surface mount TOTI board drives the inputs of the CAN_FLIM_IO_A board.

 

Regards,

Ian H

Ian,

 

You are correct, my bad for misunderstanding what I was being told :(

 

Tonight involved initial testing of the colour light signal control board with a batch of signals, plus deciding on the best colour LEDs.

 

file_zpsc0c9ceb3.jpg

 

Alongside all this, fiddle yard point construction continued a pace.

 

file_zps468a5857.jpg

 

 

file_zpscde4d1e9.jpg

 

 

Martin

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  • 1 month later...
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Latest update

Lots of wiring, track and servo mount construction has taken place over the past few months.

This week we installed the first servo point motor on one of the fiddle yard boards.

 

file_zpsbeffcc1d.jpg

 

 

The laptop was used to set up the travel movement of the servo arm for operation of the point, an omega loop has been used to absorb an minor adjustment should that be required.

 

file_zpsf7ba4a74.jpg

 

Underneath the baseboards has seen a great deal of activity with wiring and installing various control boards.

Top left (Green board): "FLIM IO A" board (designed by Ian Hart) with CAN-TOTI firmware

Top right (White board): MERG DCC-TOTI board, populated for 4 channels
This senses the trains on the four running tracks, AND provides 4 channels of point readback (the brown wires)
Bottom: "FLIM IO A" board with CAN-SERVO8C firmware
This drives the 7 servos on this board.

 

file_zps32905299.jpg

 

Buildings are being constructed offsite for the time being until all track and wiring is complete.

 

Martin

 

 

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  • 1 month later...
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We have been prototyping the mimic control panel construction and come up with the final specification.

Basically two sheets of acrylic sandwiching a track plan print. The rear sheet of acrylic is drilled for switches and LEDs, the front sheet is drilled for switches only which neatly protects the LEDs.

 

IMG_3366_zps4e4894a1.jpg

 

IMG_3367_zps9c50dc8a.jpg

 

IMG_3369_zpsb5bbc0c2.jpg

 

Martin

 

 

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  • 11 months later...
  • 7 months later...

Enjoyed reading about the progress so far, how are things getting on now?

Track, track and more track.

We are now on the front of stage track, which means blackening rail, painting and weathering concrete sleeper bases, assembling and glueing down track with super elevation on the curves. This will complete two of the four main lines, next will be the wooden sleeper track. Once this is done we can start the fun bit of carving out the landscape.

 

Martin

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  • 9 months later...

It has been a while since I have updated this project, suffice to say track laying continues while scenery mock up takes place.

Here we have MK1 version of the motorway bridge, we are making use of perspective modelling to give the illusion of distance.

This bridge will go some way to disguise the exit to the fiddle yard.

 

IMG_9383_zpsrj1l3frm.jpg

 

IMG_9382_zpsh6we8lly.jpg

 

Martin

 

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  • 7 months later...

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