I got it
Jim
________________________________
From: Rick Sparber <rgsparber@aol.com>
To: gingery_machines@yahoogroups.com
Sent: Sat, March 5, 2011 8:08:41 PM
Subject: RE: [gingery_machines] new article: True Enough (Lathe Accuracy)
Nelson,
Certainly no offense taken.
What I was trying to explain in the article was that a 3 jaw chuck does not have
to perfectly center a part in order to turn an OD that is centered within the
limits of the machine. It is not about set up, just the fact that most if not
all 3 jaw chucks do have run out.
The rest of the article gave an overview of other error sources if the lathe is
not set up right.
Since you came away with a different impression, I have to assume that I was not
clear. I did mention bearing play but that was just background info after
talking about 3 jaw chuck run out. Maybe I confused matters by tacking on that
section.
Rick
-----Original Message-----
From: gingery_machines@yahoogroups.com [mailto:gingery_machines@yahoogroups.com]
On Behalf Of Nelson Collar
Sent: Saturday, March 05, 2011 8:50 PM
To: gingery_machines@yahoogroups.com
Subject: Re: [gingery_machines] new article: True Enough (Lathe Accuracy)
Rick
I read your article on "True Enough (Lathe Accuracy)". I'm sorry, but what I got
was that your chuck and let us not forget the bearings is the cause of
inaccurate work. There is no machine that will do perfect work with so effort of
the operator and the skill there in. If a person is going to make a shaft, we
should not use our three jaw chuck or the four jaw or even the six jaw. I think
when a machine is not set up properly for the job to perform, one can't expect
the accuracy in the end. And to blame the bearings for the fault of the set-up
is wrong. If the bearings are that bad they need to address before looking for
precision work. I agree with what you are saying but do not blame the machine
for something out of it's control. Also if the work call for the accuracy you
are talking about then you would want to have a steady or follow rest. I
understand this was written to "newbies", but instead of pointing out the wrong
of a machine,
when the machine is acting just like any other machine would work. Maybe we need
to point the "newbies" (I hate that word) in the proper set up to avoid the
inaccuracy that is normal on any machine under that circumstances. Again that is
the reason that a lathe by itself is worthless. If one has the hands on an the
proper tooling almost anything can be done. Again a lathe without tooling and
the knowledge to operate, it can be dangerous.
I will apologize if I offend you, but hope instead we try to show proper set up
to avoid these kinds of problems
Nelson Collar
[Non-text portions of this message have been removed]
http://groups.yahoo.com/group/gingery_machines/app/peoplemap/view/map
No comments:
Post a Comment