Gallery, Projects and General > Project Logs
French Beam Engine
HS93:
Nice I like the finnish on the cylinder.realy nice and quick.
Peter
doubletop:
Thanks Rob I am pleased with it.
Peter
The method I used for the cylinder is the same as for my previous two engines. This approach is driven by not having large lumps of bronze or brass available to machine the whole thing from solid, or having castings. Machining the radius of the recess for the cylinder in the valve block very slightly under size of the radius of the cylinder means it sits in alignment when soldering. Having got my soldering technique more or less sorted now it went together well. The sand blaster just gives it a nice finish and helped with the 'blending' of the two parts.
The milling of the radius wasn't that quick, each quadrant was around 250 steps, maybe too many, but better small cuts than large gouges that go wrong. Getting the SINO DRO to do the 'smooth arc' function correctly needs a bit of practice. It can seem to be doing the right thing at first and then head off pointing if mid air or somewhere else strange. I now step through the cut sequence to see where it wants to go before switching on the mill. Getting any of the start parameters wrong can lead to apparent odd behavior. Once you get it right you realise its a case of operator GIGO.
Pete
NickG:
Very very nice Pete. :thumbup:
doubletop:
Thanks Nick
Strip down and finishing starts today
Pete
Doc:
Nice engine good job!
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