2023-10-02

Last modified: 2023-10-02 20:41:02

• Making the scale
• Metal escapement model
• Next

Plan:

• car MOT
• finish the Douzieme gauge
• tidy the garage and office
• maybe start on CAD of the next metal escapement

It's too wet to cut the grass. I've taken the car to the MOT. On to the Douzieme gauge...

Update: the car passed the MOT.

Making the scale

I followed the instructions I wrote yesterday. Here's after the first pass of engraving (~10 mins):

The writing is maybe too small.

And after sanding the burrs off:

I'm going to run a second pass to make it deeper, and then experiment with trying to put sharpie or paint in the grooves.

Well I tried to rub some sharpie in and that didn't really work, and then I tried to paint it and rub the paint off the top and that didn't really work either, but it is readable:

Pretty happy with this, it is made to a higher standard than I normally achieve. Might have been nice to engrave my name on it, but I'll just leave it now. Time to move on to something else.

Blogged: https://incoherency.co.uk/blog/stories/douzieme-gauge.html

Great success, Douzieme gauge completed. Now just some tidying to do, and I can start on CAD of the metal escapement...

Metal escapement model

I think I'll do this at 1x scale. So I just need to make up a CAD model with:

• balance wheel
• pallet fork
• escape wheel, on shaft with driven gear, with proper pivots
• barrel, on shaft with driving gear, with a removable pivot to allow winding
• frames

Next

• make the improved lathe microscope bracket
• on to the metal escapement