25720Re: Is the G0704 a good mill?
- Mar 1, 2013I don't have one of these G0704 mills, but I WANT one!
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--- In GrizHFMinimill@yahoogroups.com, Dale E <dalee1002000@...> wrote:
> Few owners complain about rigidity problems with the 704, at least far
> fewer than Seig owners. Hence, there isn't really any info on stiffening
> out there. Whether this is due to materials mostly used or other factors,
> can be open to debate. It is probably a 'your mileage may vary' thing.
> How you set up a part to mill will greatly affect stiffness. The object is
> to keep tooling and spindle as short as possible. So I try very hard to
> keep parts as low to the table as possible to keep the head to the bottom
> of the column. I also drop the head to do roughing cuts and then use the
> spindle fine feed for final finishing cuts.
> As I said, I can get a 3/4" endmill to take .100" full width cut in mild
> steel with no problems at a 1" to 1 1/2" inch per minute feed rate. But I
> do pay attention to making the best set up I can. After that, it's a matter
> of how fast you think you need to move metal. Need to do it fast? You will
> need to more mass and power. If you have time, like most hobbyists have,
> then you can afford to go slower.
> Fly cutters are really only meant for light finishing cuts, of .020" or
> less. They can even make a full sized mill hammer. Biggest problem with
> such cutters is lack of torque at low speeds. And not rigidity.
> On Fri, Mar 1, 2013 at 7:42 AM, Jeremy Winder <cptwinder@...> wrote:
> > **
> > Thank you for the reply.
> > As for what I'm going to use it for, I'm not really sure myself. The
> > projects I currently have in mind fit the work envelope with room to spare
> > and are mostly aluminum. However, I discovered with my 7x10 lathe, once I
> > have a capability I find more and more projects to do. And them seem to get
> > bigger and bigger.
> > Can I assume from your comments that that G0704 does have a rigidity
> > problem when cutting steel? Can this be overcome by stiffening the column
> > and/or shallower cuts? Is the issue in the column or in the bed as well?
> > Thanks again,
> > Jeremy
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