Category Archives: MRServo

3D Printed MRServo Brackets

While I’m still a firm supporter of the tried-and-true industrial foam tape method we’ve sold for MRServo servo switch machine mounting since the beginning, there’s always room for improvement.  Several customers have asked about alternate, mechanical mounting methods, and there’s definitely places that would be useful.  I always have a machine or two that keeps getting knocked loose as I accidentally catch the wire with a tool, or sometimes a spot on the plywood that just refuses to adhere well.

The “conventional” solution would be to have injection molds made, and then have a run of several hundred or thousand parts produced.  This is obviously expensive for us, highly speculative that somebody will actually buy them, and beyond what the meager profit margins on servo switch machines justify.  Fortunately, we live in an absolutely amazing time in terms of manufacturing processes, and nothing is more exciting right now for manufacturing complex plastic parts than 3D printing.

The 3D model of the MRServo-2 / MRServo-3 Bracket

The 3D model of the MRServo-2/-3 Bracket

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Using Berrett Hill Touch Toggles with MRServo

One of the most interesting electronic parts to come on the market lately is Berrett Hill’s Touch Toggles.  They’re little electronic switches that operate by the proximity of your finger.  There’s no mechanical movement, so you can put them behind acrylic control panel faceplates and other such and still operate them just by touching the surface.  Unlike a mechanical switch, they never wear out, and they come with built-in indicator lights. Continue reading

Simulate a Spring Switch

Spring switches are used by some prototype railroads to save the crew from having to re-align the switch points after passing through the switch.  The switch is sprung in one direction (typically the mainline), allowing any train to pass through the switch from the frog end without manually aligning the points.  When entering the mainline from a siding, this allows the train to continue on its way without having to realign the points to the main – the spring action takes care of this automatically.  Modeling this unique feature can be easily accomplished with an IR sensor and switch machine. Continue reading

MRServo FAQ

MRServo is a simple, cost-effective solution for adding remote turnout control to your layout.  While MRServo works in a wide range of turnout control applications, each layout presents its own unique set of circumstances.  Below are answers to some of the most frequently asked questions we have received from modelers using the product.  If you have a question not answered here, please contact us and we would be happy to help.

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MRServo In Action

We always like to see what sort of tips, tricks, and clever uses our customers have come up with for our products.   I thought I’d take a minute to pass along a couple recent uses for MRServo that customers have shared with us.

Using lightweight extruded foam as a layout base has become pretty popular in the last few years.  It’s lighter and significantly cheaper than the traditional 3/4″ plywood, and much easier to sculpt into terrain.  Unfortunately it presents some challenges in mounting switch machines and the like.  Dennis from the UK has worked a clever method of installing the servos through the foam.  It also has the side benefit of being not significantly wider than N scale track, making very tight installations (such as in yard throats) possible.  Take a look at his mounting method on his website.

Moving up to the larger end of the traditional scales, our next clever use is in 3-rail O scale.    Bob Walker started with a Lionel FasTrack manual switch, and connected a a MRServo-2 with a 49MHz RC car radio to make a radio-control version.  The MRServo was customized to have full throw of the servo, rather than our typical throw suitable for the suggested mounting.  It’s connected to the radio’s outputs via another small relay, which provides the input signal for the MRServo board.  Bob sent along a few pictures of the system in action, which I’ve posted as a PDF.  Eventually he’s intending to upgrade the system to Zigbee radios, which should provide the ability to radio-address virtually an infinite number of switches.

If you’ve got something to show off, send us some pictures and a quick write-up at support@iascaled.com.  We always enjoy hearing from our customers, and if you’ve got a good tip, there’s a pretty good chance you’ll be featured in a future blog posting.

MRServo Slow Motion Turnout Control

Ever wanted to automate the turnouts on your layout?  Maybe you have some that are hard to reach?  Or maybe you have a hidden staging yard?  Do you model a modern CTC-controlled subdivision and want to give your dispatcher realistic control over the turnouts?  Or maybe you have a multi-deck layout and other switch machines are too bulky to sit below the upper decks?  No matter what the situation, MRServo is a cost-effective solution!

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Installing MRServo Switch Machines

A couple weeks back, I removed the old staging yard from my layout in the process of tearing out the old to make room for my new layout.   I didn’t need it for the new layout, so we decided to repurpose it for writing an article on complex turnout control using MRBus.  It was built ten years ago, long before MRServo was even a thought in my mind, and was consequently powered with a competitor’s large green switch machines.  I’ve gone entirely to MRServos now for the new layout, and we’re obviously going to try to show them off as part of any article we’re working on.

As we were installing them, it occurred to me that it might be nice to show folks how to reliably install MRServo, step by step.  The instruction sheet covers this all, but sometimes a picture really is worth a thousand words.  Once you get the hang of it, it’s quite easy and goes quickly.

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