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Posted by Scott Kelley on February 26, 2008, 3:05 pm
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Wondering what the usual method is for dressing the wheel on a toolpost
grinder. All I can come up with is to make something that will attach to
the ways that will hold a diamond dressing tool.
Thx
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Posted by Harold and Susan Vordos on February 26, 2008, 3:48 pm
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> Wondering what the usual method is for dressing the wheel on a toolpost
> grinder. All I can come up with is to make something that will attach to
> the ways that will hold a diamond dressing tool.
>
> Thx
>
Any way you can mount the diamond so it functions would be acceptable. Keep
this in mind.:
Mount it at such an angle that rotating it will present a sharp edge.
Angling it downhill at 10 degrees would work. Use your diamond in such a
way that you don't wear a rounded tip, rendering it less than useful.
Sharp corners of a diamond are far better than a round point when dressing a
wheel.
Use a diamond in such a way that it can't "stub". If you angle it upwards,
rotation of the wheel, assuming it's running downwards on the diamond, isn't
a good way to go. Also, because the wheel is rarely truly at a right
angle to the spindle, both the diamond and wheel should be on the centerline
in order to dress the wheel surface parallel to the work surface. Angle of
the wheel makes no difference if you're on center, assuming you don't use
the side of the wheel to kiss a face. In that case, angle is critical.
Best is to avoid using a toolpost grinder. They are a miserable choice when
compared to a cylindrical grinder, and should be operated dry. Dry grinding
leaves a considerable amount to be desired. Overall, they perform poorly,
but they do permit working on objects that, otherwise, may be beyond your
ability to machine.
Be careful to fully mask your machine to minimize the amount of abrasive
that will accumulate on critical surfaces. Lathes aren't made to be
exposed to such contaminants, and suffer considerably when so exposed. Do
not attempt to use coolant. That will spread abrasives in all directions.
Not a good idea.
Harold
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Posted by Dan on February 26, 2008, 6:37 pm
Please log in for more thread options On Tue, 26 Feb 2008 20:48:20 GMT, "Harold and Susan Vordos"
>
>> Wondering what the usual method is for dressing the wheel on a toolpost
>> grinder. All I can come up with is to make something that will attach to
>> the ways that will hold a diamond dressing tool.
>>
>> Thx
>>
>
>Any way you can mount the diamond so it functions would be acceptable. Keep
>this in mind.:
>
>Mount it at such an angle that rotating it will present a sharp edge.
>Angling it downhill at 10 degrees would work. Use your diamond in such a
>way that you don't wear a rounded tip, rendering it less than useful.
>Sharp corners of a diamond are far better than a round point when dressing a
>wheel.
>
>Use a diamond in such a way that it can't "stub". If you angle it upwards,
>rotation of the wheel, assuming it's running downwards on the diamond, isn't
>a good way to go. Also, because the wheel is rarely truly at a right
>angle to the spindle, both the diamond and wheel should be on the centerline
>in order to dress the wheel surface parallel to the work surface. Angle of
>the wheel makes no difference if you're on center, assuming you don't use
>the side of the wheel to kiss a face. In that case, angle is critical.
>
>Best is to avoid using a toolpost grinder. They are a miserable choice when
>compared to a cylindrical grinder, and should be operated dry. Dry grinding
>leaves a considerable amount to be desired. Overall, they perform poorly,
>but they do permit working on objects that, otherwise, may be beyond your
>ability to machine.
>
>Be careful to fully mask your machine to minimize the amount of abrasive
>that will accumulate on critical surfaces. Lathes aren't made to be
>exposed to such contaminants, and suffer considerably when so exposed. Do
>not attempt to use coolant. That will spread abrasives in all directions.
>Not a good idea.
>
>Harold
>
>
We had a tool that looked like a C clamp. It had the diamond dresser
mounted in a hole so that it pointed at the wheel. We clamped it on
the part to be ground.
Just like Harold said, the whole setup, grinder and dresser was a poor
setup all the way around.
We could get a better finish with carbide tools for what we were
building.
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Posted by Jon Elson on February 26, 2008, 5:58 pm
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Scott Kelley wrote:
> Wondering what the usual method is for dressing the wheel on a toolpost
> grinder. All I can come up with is to make something that will attach to
> the ways that will hold a diamond dressing tool.
I just pinch the dresser between two chuck jaws, but you have to do this
before the workpiece is in the chuck.
Jon
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Posted by on February 26, 2008, 10:15 pm
Please log in for more thread options > Wondering what the usual method is for dressing the wheel on a toolpost
> grinder. =A0All I can come up with is to make something that will attach t=
o
> the ways that will hold a diamond dressing tool.
>
> Thx
Don't know what the usual method is, but my intent is to make up a
square channel-shaped gizmo to bridge the cross-slide and long enough
to lay across the ways, then use a regular diamond dresser jig like
you can get for surface grinders and the like. Height of the
combination will be somewhat critical. Might even be able to make do
with good plywood or something like polycarbonate. I've got a lot of
thick Lexan cutoffs, myself.
Re: other posters comments:
Specialized grinding equipment is great if you have the bucks for same
and no doubt a whole lot better to use in a production setting. For
the rest of us that only need to do grinding once in a blue moon and/
or don't have room for cylindrical grinders and such, a tool post
grinder has to make do.
Stan
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> grinder. All I can come up with is to make something that will attach to
> the ways that will hold a diamond dressing tool.
>
> Thx
>