Re: [CAD_CAM_EDM_DRO] consequences of way wear on lathe work
Posted by
Marcus & Eva
on 2002-07-07 22:32:48 UTC
Hi Carlos:
The carriage on the Monarch is so long that the tail end rides on a
relatively unworn area of the bed, while the front rides on the most worn
area.
This makes the carriage travel not completely linear as the carriage twists
a bit to accommodate the wear.
Also the flat way is worn much less than the front vee way, so the carriage
tends to drop away from the work at the front.
I get a taper of about 0.001" in 6" on diameter with the machine in its
current state.
The machine brand spanking new is guaranteed to be within 0.0001" in 4"
which is more like what I'd like.
I bought the machine to get a tool worth growing old with, so the money it's
going to cost to bring it back to first class condition is well invested in
my opinion.
(Besides, it's before tax dollars for my business, which makes it almost a
no-brainer when I think of the unpalatable alternative of handing the cash
over to those thievin' bastards in Ottawa as taxes!!!)
The Monarch has to be driven to be truly appreciated!
Even in its current state, it can take a cut like you wouldn't believe.
I can bury a carbide tool and peel a half inch off the diameter of a 2 inch
303 stainless bar in one pass without the machine even breathing hard.
It's beautifully laid out, and is just a joy to use (I couldn't resist
powering it up and carving up some bar stock just before I started the
stripdown).
Makes my Taiwanese 12 x 36 seem like a toy.
I seem to be building more and more injection molds again, so a nice
accurate machine is worth it to me.
It's total overkill for the plastic prototypes though.(But I don't care!!!
I'm happy as a pig in shit!!!)
Cheers
Marcus
The carriage on the Monarch is so long that the tail end rides on a
relatively unworn area of the bed, while the front rides on the most worn
area.
This makes the carriage travel not completely linear as the carriage twists
a bit to accommodate the wear.
Also the flat way is worn much less than the front vee way, so the carriage
tends to drop away from the work at the front.
I get a taper of about 0.001" in 6" on diameter with the machine in its
current state.
The machine brand spanking new is guaranteed to be within 0.0001" in 4"
which is more like what I'd like.
I bought the machine to get a tool worth growing old with, so the money it's
going to cost to bring it back to first class condition is well invested in
my opinion.
(Besides, it's before tax dollars for my business, which makes it almost a
no-brainer when I think of the unpalatable alternative of handing the cash
over to those thievin' bastards in Ottawa as taxes!!!)
The Monarch has to be driven to be truly appreciated!
Even in its current state, it can take a cut like you wouldn't believe.
I can bury a carbide tool and peel a half inch off the diameter of a 2 inch
303 stainless bar in one pass without the machine even breathing hard.
It's beautifully laid out, and is just a joy to use (I couldn't resist
powering it up and carving up some bar stock just before I started the
stripdown).
Makes my Taiwanese 12 x 36 seem like a toy.
I seem to be building more and more injection molds again, so a nice
accurate machine is worth it to me.
It's total overkill for the plastic prototypes though.(But I don't care!!!
I'm happy as a pig in shit!!!)
Cheers
Marcus
----- Original Message -----
From: "Carlos Guillermo" <carlos@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, July 06, 2002 8:28 PM
Subject: RE: [CAD_CAM_EDM_DRO] Creating long straight edges (and big
squares)
> Hi Marcus -
>
> Just curious about your .0025" of wear - can you actually measure
> the effect of this on your parts? I had an old Southbend with a
> good .020" wear on the busy part of the front vee, and it really
> only bothered me on small diameter cuts. I would guess that the
> horizontal component of this kind of wear decreases as the cut
> diameter increases, as long as it's just vertical wear from the
> carriage going back and forth. What's your case?
>
> Regards,
>
> Carlos Guillermo
> VERVE Engineering & Design