Closeup photos of construction details

close-up view of the pcb with the accommodation of the length difference

This is the top view with the cuts in the rail to accommodate the length differences. The outer end of the rail is fixed to end of the modulair baseboard.The length variation between the rails caused by the different curves between tracks is caught in a gliding rail section build on pcb. The front part is fixed by soldering to the pcb. The long curving sections of the rails glide between 2 brass L-angles soldered to pcb. The rail is kept by the foot. Effectively there is no gap as both ends are halved lengthwise gliding along each other between the angle sections. The pcb board is fixed via a curved slit in the baseboard to a wagon with 2 rollerbearings as wheels.

the wagon below the baseboard

This photo shows the wagon that keeps control of the track above. It pulls the pcb with track against the baseboard. This wagon of aluminium angle is fixed to a piece of M6 threaded rod hinging to a vertical axle some 25 cm away screwed to underside of the baseboard. The wheels are fixed by M4 screws excentered in a piece of hexagonal rod to be able take out any slack. This enables the adjustment of the downward force and the friction needed to pull it over. The wheels are roller bearings. A total length of 32.5 cm is sufficient to curve the rail with a minimum radius of about 1.2 m. This lot thus compresses 6 points 1:9 effectively taking up the room of only 1 point thereby giving about 50 cm extra track length, with a building time far less than needed for point building. Automatic operation by motorcontrol is a feature.


This photo shows the central spil on which the M6 rod rotates fixed in a piece of brass.

track connections

Complete traverser, note the intertwined track connection on the right hand side.

servo motor

The unit can be driven with a servo motor, this is connected to the main M6 rod with a simple crank.

feedback unit

Photo shows the actual feedback unit. A steel strip with sawcuts and lightsluice.

slider unit and analog wiring

This is all superfluous when using NMRA DCC, wiring and phosphor bronze slider contacts for analog use.