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

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

Update on the Flood

The waters have subsided, and we have three fridge-sized dehumidifiers running 24/7 in the basement.  My emotions have also subsided – there is nothing quite like three evenings of digging holes in the glacial til to promote philosophy. The insurance adjuster hasn’t yet decided if they will cover the losses – it comes down to a question of flood or seepage.  Honestly, they should have … Continue reading Update on the Flood

Dave Booth is a demon with a jewellers’ saw

Tonight I cut some spokes in one of my test wheels.  I was most interested to see if the wheel gets floppy if you take away most of the material in the centre to replace it with plastic.  It doesn’t. But I tell you what: fretting out the spokes is hard work!  On this small wheel, it’s nearly impossible to get anything into the holes … Continue reading Dave Booth is a demon with a jewellers’ saw