Roundhouse doors may be too close for magnets

It’s been a rainy weekend here in Vancouver – at last!  The kids and I spent a lazy afternoon raking through the Lego.  They’re working on some very inventive cars, and I’m plugging away at mocking up the mechanism for the roundhouse doors. I foolishly went out into yesterday’s storm to get some magnets at Lee Valley tools.  I returned with their sample pack, plus a … Continue reading Roundhouse doors may be too close for magnets

Roundhouse pits should be oversize in baseboards

What was I thinking when I routed out the inspections pits in the baseboard? I made them just slightly over 4′ wide, which is the correct width. However, I left almost no space for a veneer of any sort.  The result was that I was forced into making concrete pits with .010″ thick walls. Following the same logic as with the turntable pit, I suppose … Continue reading Roundhouse pits should be oversize in baseboards

Forward at last: Pembroke turntable pit installed

One of the nice things about keeping a blog is that you can look back and see how long ago you started thinking you were at the point you are now.  This stall with the turntable drive has been exactly a month, but last night I declared victory and installed the pit and drive in the layout. The whole area of the roundhouse and turntable is … Continue reading Forward at last: Pembroke turntable pit installed

Driving roundhouse doors magnetically takes more metal than expected

I arrived home this evening to find the Boy had taken a stab at working up the roundhouse door mechanism in Lego. Like all the people on my team at work, he had very high-level instructions, and as with them, he exceeded my expectations. I’m sure there are more bevel gears in his collection, and I may ask him to see if he can make … Continue reading Driving roundhouse doors magnetically takes more metal than expected

Another Idea for Roundhouse Doors

My friend Mark Dance has been coming up with all sorts of ideas for mechanisms for Pembroke lately. This week, he sketched an alternative mechanism for opening and closing the roundhouse doors. I’ve reproduced his sketch here, along with my usual ruminations. Mark’s idea is to use Lego bevel gears on a shaft that can be pushed or pulled to engage the bevel gears for … Continue reading Another Idea for Roundhouse Doors

Lego Experiments Bear Fruit

Thanks to some encouragement from the followers of this blog, I gave Lego a shot for driving the turntable. We have a house full of the stuff, although one of our collectors likes mostly the Friends and Elves Lego, which is sadly not conducive to turntable manufacture. Fortunately, the Boy like Star Wars and Technic and other Lego that is full of gears and whatnot. … Continue reading Lego Experiments Bear Fruit