Stuart Twin Victoria (Princess Royal) Mill Engine
Discussion
Continued with the crosshead by making the pillars and spacers
Always frustrates me that there’s no easy, accurate way of determining how far the tailstock is being extended. Resorted to a bit of tape to get consistent depths.
I made a fixture for the chuck by facing some steel, then drilling and tapping it and fitting a screw. I could then fit each stub in there and know it was against a hard datum. Didn’t ensure concentricity though.
Test fitted for separation, before all spacers were faced at the same setting (as above). By some miracle the first cut turned out to give what appears to be a perfect sliding fit for all four brass sliders. Which was nice.
Set the tool so it was perpendicular to the work, trying to ensure equal radii at each end of the necked part:
TBH I was initially turning to scribed marks at each end to establish the datums, and must have misjudged one. The lands were unequal, and required more work. They’re not exactly right now, but seeing as they’re decorative, and will be painted, I let it go.
Pillars (all OK):
Spacers (a few unequal lands):
Test assembled:
Couldn’t resist balancing the rest together to see how it was looking:
It looks nice so far, but it has to be said it doesn’t seem to reflect the amount of work that’s gone into it just yet.
Always frustrates me that there’s no easy, accurate way of determining how far the tailstock is being extended. Resorted to a bit of tape to get consistent depths.
I made a fixture for the chuck by facing some steel, then drilling and tapping it and fitting a screw. I could then fit each stub in there and know it was against a hard datum. Didn’t ensure concentricity though.
Test fitted for separation, before all spacers were faced at the same setting (as above). By some miracle the first cut turned out to give what appears to be a perfect sliding fit for all four brass sliders. Which was nice.
Set the tool so it was perpendicular to the work, trying to ensure equal radii at each end of the necked part:
TBH I was initially turning to scribed marks at each end to establish the datums, and must have misjudged one. The lands were unequal, and required more work. They’re not exactly right now, but seeing as they’re decorative, and will be painted, I let it go.
Pillars (all OK):
Spacers (a few unequal lands):
Test assembled:
Couldn’t resist balancing the rest together to see how it was looking:
It looks nice so far, but it has to be said it doesn’t seem to reflect the amount of work that’s gone into it just yet.
dr_gn said:
Continued with the crosshead by making the pillars and spacers
Couldn’t resist balancing the rest together to see how it was looking:
It looks nice so far, but it has to be said it doesn’t seem to reflect the amount of work that’s gone into it just yet.
Whoop whoop, its starting to come together!!! Couldn’t resist balancing the rest together to see how it was looking:
It looks nice so far, but it has to be said it doesn’t seem to reflect the amount of work that’s gone into it just yet.
dr_gn said:
Not really. I keep looking at it, but then thinking...I've got to make more tooling for it (which I hate). Then I go and do something else.
Funny that. I enjoy making tools more than making that actual item.I think making the tool is more abstract, as I know what the item should look like, but the tool needs to come out of my head.
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