Re:My new Freight Depot
Next I had a look at the "engine". I had thoughts of fitting brass bearings to the main axis but attempts to pull the flywheels off persuaded me to leave it alone for now. Oiling and intermittent operation were bywords fo the moment. Looking at the idea of a motorised saw bench, I needed to have the saw turning at what appears to be realistic speed whilst the engine also appears to run at a realistic speed. I have several MFA motors - three with gearboxes and one from the railbus without any gearing - at different voltages.
I decided to use a 1 - 30 ratio running at 3V. The 15 volt one off the railbus would have meant making a speed controller and I wasn't into that!
Using scraps of wood I made the basic "guts" of the bench. Using a mixture of modern meccano bits I contrived the saw spindle, using bevel gears (Maplins) for the drive transfer.
Bearings are scratch-built from an old tower bolt and some nylon rod drilled to accept the spindle. Pulley for the belt to the motor is just a piece of dowel tightly pushed on the 4mm spindle.
The profile of the aluminium makes the bearings look like plummer blocks.
'' and, at the end of the day, I still had a tower bolt!
The crude saw blade is made from the base of a Pringle container. I have seen some miniature cast steel blades for sale so I might change it when I can spare some more pennies!
I need to case this all in and fit the saw table. I used a rubber band as a drive belt to try it all out and it appears to work. As with all flat belt drives, alignment is crucial as the belt will walk off the pulleys! Clearly the saw and the engine will share a common base.
Hope to get some more work done today.