Tam Valley Depot

Great Electronics for Great Model Railroads

 

Home

Products

DCC Frog Juicers

DCC Booster

Octopus Servo Driver

Micro Singlet Servo Decoder

Dual 3-Way

SwitchWright Board

Fascia Controllers

Servos & Accessories

Ordering Info

Dealers

Support

User Gallery

Which Frog Juicer?

Frog Juicer Info

Who is that frog?

Crossovers

Double Slip Switches

DCC Wiring

Layout Wiring

Servo Mounting

Thick Foam

Diode Matrix Routes

About Us

Contact Us

Repair Replace Warranty

How to use a servo to throw a switch through thick foam

   
Here are some pictures showing how I used a bell-crank type mount to actuate a turnout through about 3 inches of roadbed, foam and plywood.  This method is quite robust and very easy to align.  The disadvantage is you can see the wire on top of the ties.  However using a long wire from below is difficult because there is too much play in the system to reliably throw the servo.  Of course, if I had planned ahead I could have cut out the foam below the turnout and put a plate underneath to mount the servo bracket on.

Closeup showing the crank and brass tube mounted through the foam.
Schematic diagram of the crank method for using a servo to actuate a turnout.

© Copyright 2021 Tam Valley Depot, San Diego. Contact: dmcree at tamvalleyrr.com