About the Model:

The model is a Marklin outfit 10900 produced for their 90th anniversary in 2004 with the addition of 6 motors and a GRB. The original outfit was a typical Marklin model where you had to operate it by hand. I saw it as a nice project to motorise. It is split above the GRB because I am paralysed and in a wheelchair and can not lift it complete. The top uses its own battery pack and control functions but the tracks are on a separate 12v controller.

Probably one of the best outfit models Marklin made.

The track motors are industrial Maxon 65 rpm equivalent to 1/60 on the powerdrives, but they have about 5 times the torque, driven by a standard Marshall 11 controller, with a controller in the line for controlling the individual track, all the upper motors are running of the Lidel power cube with its own controller for all movements there are no brakes on any of the winding drums. The reason for this is that from my wheelchair the excavator only needs to move a short distance on the table, the main controls are on a control box. By using the gears/powerdrives it allows you to change the speeds of each operation easily, I still think some need adjusting and I am working on it, I am just waiting for a friend who will give his opinion as to which drives have a realistic speed.

I only used toothed wheels at front and rear axles, using 109 sprayed matt black for the 3 inner wheels, can you see the drive from the centre wheels to the unsprung driving wheels via a chain inside, also you maybe able to see that it was better to turn the toothed wheels on the outside around so that the bosses stuck out to aid with alignment in the tracks. By using 2 power sources did not have to solve the problem of getting power up/down to tracks.

As you can see that there is a balance weight in the rear section which is demountable, I had to change the device for holding the rear section on due to weight with battery, the whole thing now weighs over 20 kg and it is not possible for me to pick up.