Sheet metal construction fixtures

When I built #10, one of the innovative and useful ideas was to create both running boards out of a single large piece of brass.  This helped me get the boiler level relative to the running boards, and since Pembroke is not an incline railway, a level boiler is desirable. I’ve planned the same approach with the virtual model of #622.  Interestingly, using the Finish … Continue reading Sheet metal construction fixtures

Engine truck design – the murk beneath

When you model something that has been gone for over a hundred years, you get used to squinting at photographs and trying to imagine a design that might present similar patterns of dark and darker.  In the case of the engine truck, which is missing from the erection drawing for 622, I found a drawing online that explained the shapes beneath the cylinders.  I used … Continue reading Engine truck design – the murk beneath

Using OnShape to create etching patterns in InkScape

I’ve been experimenting with OnShape sheet metal models to produce patterns for etching parts.  Being designed for ordinary bending processes, OnShape is not directly applicable, but I think it is close enough for my purposes. Here are the sheet metal model parameters that I have found work in OnShape to produce drawings that match the recommendations for etching. Thickness = material thickness Bend radius .0004″ … Continue reading Using OnShape to create etching patterns in InkScape

Flood update: cabinets removed

Over the past couple of days, OnSide has made further progress toward remediating the flood.  The cabinets were removed on Monday afternoon, and heaped in the middle of the floor.  Most of them were moved to a warehouse yesterday, except the big one, which doesn’t fit up the stairs.  The movers protected it and fixed it to a trolley so the flooring people can move … Continue reading Flood update: cabinets removed

OnShape and etched fold lines

Due to flooding, progress on real modelling has halted, and I’ve had to move into the virtual realm.  This is okay, as there is loads of drawing work yet to do on 622. I speculated a couple of months ago that some careful manipulation of OnShape’s new Sheet Metal Model feature might yield a good pattern for etching.  Tonight, armed with an excellent resource on design … Continue reading OnShape and etched fold lines