Drivers quartered

There is a saying in the Maker community: if you can’t make it perfect, make it adjustable. The corollary is surely that if you can’t make it adjustable, make it perfect. These drivers are a one-shot deal. Either I get the quartering perfect, or I’m soaking them in acetone to loosen the epoxy, which will […]

Exhaust cam

I am going to steal #10’s ESU DCC decoder for #622; it’s not doing any good sitting in the tender while #10 awaits shopping. This decoder wants four magnets and a Hall sensor to synchronize the exhaust chuff sound. Now, there is not much space on the axle between the gear box and the wheel […]

Improved engine truck assembly

The first time I assembled the engine truck, it was held together mostly by fervent prayer while the epoxy set. The result was as shaky as my belief in prayer! Perhaps if I were more spiritual, this would be a good strategy for me. The second and third attempts leveraged a new pair of jigs […]

Crankpins installed

I decided to use the quartering jig to hold onto the crankpins while the epoxy holding them in place cured. The theory was that regardless of where the actual holes in the wheels wound up, the vital metric was the distance between wheel centre and the crankpin itself. So, I gave the quartering jig bosses […]

Another way to wreck a driver

You may recall that one of the previous methods to wreck a driver was to drill the hole for the crankpin off-centre. Actually, that didn’t completely wreck the driver: once the spokes had been taken out, it looked salvageable. A short length of steel soldered in the hole and filed flush made it look as […]

Crankpin nuts: a war of attrition

The crankpins leverage M0.6 bolts, with nuts buried in housings inside the back of the wheel. Those nuts are really tiny – 1 mm across the flats, and so, I had always thought I would glue them into the back of the crankpins, rather than risk having them work loose and disappear amongst the ballast. […]

Just two holes!

All I wanted was two holes. Two holes for crankpins 1mm in diameter and the right distance from the centre holes in the quartering jig. It seemed simple enough when I conceived of them. But then, how to get the holes the right distance from the centre? So I made a tiny bushing to fit […]