Pierre,
You have it right - I was just afraid to push my baby. She did just fine and I suspect can do a lot more.
One modification that I could make if needed would be to replace my aluminum flywheel with a steel one. That would certainly provide the extra power as the cutter enters the block. But from what I saw just now, it doesn't seem to need it.
Rick (via iPod)
On Oct 3, 2010, at 4:38 PM, "pierrepmx" <foxtango@spectralfactory.com> wrote:
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> Hi,
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> just a thought...
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> from what I understand about shapers, their geometry makes that the resistance to the movement is not only along the direction of the cut, but there is also a vertical force due to:
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> - a torque resulting from to the eccentricity of the tool tip (the resistance point) wrt ram movement (in the down direction)
> - the design of the Gingery shaper that connects the ram to the vertical driving bar (the "yoke" ?) via a rigid link, creating some vertical component to the force.
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> So, this could create a strong pressure (and then friction) on the ram ways, that :
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> - is dependent on the surface condition of the ways
> - increase with the load, and if you don't get enough momentum, it could lead to a sort of interlocking mechanism (more load-> more friction -> more load ->...).
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> [Also, I suppose that the ways require a generous amount of oil to operate smoothly ?]
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> So my first suspects would be :
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> - surface condition of the top and lateral ram slides
> - lubrication of the ways / pivots
> - too tight "fitting" of the ram on the ways
> - eventually a default in geometry (but it's very unlikely, as you probably followed Dave Gingery's design)
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> Or maybe you are just a bit scared to push the machine, and feel like a father watching his boy riding his bicycle for the first time without the 2 little rear wheels ;-)
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> My 2 (Euro-)cents...
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> Pierre.
http://groups.yahoo.com/group/gingery_machines/app/peoplemap/view/map
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