Hi I'm the "inventive geniuses." as Monty put it and this is a few pictures and information as to the track cleaner. I used it on the track that you see Monty blowing. The tracks have been down for quiet a few years and only used by Steamers or Battery Locos so the buildup of gum and dirt from the gum trees is to put it mildly, thick. The cleaner took four passes but on a well kept system once should be enough. Because the pad rotating in opposite direction on each track there is no pull in any direction so the load on the loco is minimal.
The chassis is an old Caboose. I will give information as to where these can be obtained at the end.
From the top down 12 volt motor 19:1 gear box reduction - 540rpm.
To the right of the motor is a 5 amp rated speed control with in built fuse. ( It was found that during operation it only drew 0.55 Amps)
To the left of the motor is the charging socket and the power switch.
Either side are weights made up of cut down solder sticks.
Below those is battery in two halves each containing two Li-ion 3500 mAh batteries. All wired in series to give 13.8 Volts
Below this is the adapter from the 6mm motor shaft to a 10/1.5mm threaded, 25mm long to attach the scouring backing unit.
The backing unit allows for attachment of Velco backed scouring discs which allows for easy replacement. (I found that the wear on the the scouring pad is very small)
I adjust the pressure of the scouring pad by using shims (washers)
Parts:
Motor - 19:1 Metal Gearbox 37Dx52L mm (Helical Pinion) available -
19:1 Metal Gearmotor 37Dx52L mm (Helical Pinion)
Speed Control - Jaycar -
5A 12VDC PWM Motor Speed Controller Kit | Jaycar Australia
Batteries (4 Req'd) -
Panasonic NCR18650B 3400mAh Li-Ion Battery (Flat Top) With Tabs - Ausbatteries
Cleaning Pads and Backing unit -
Temu United Kingdom | Explore the Latest Clothing, Beauty, Home, Jewelry & More - Scouring Pads Set 75mm (sorry no direct url)
Total Cost approx - Au$100:00 + Carriage (4 wheel)