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<p>After Ithought a little, I forgot about the 48x120 gap bed lathe,
the 24in shaper, the 12x36 surface grinder and the other one
sitting outside that was dropped off a forklift at the shippers.
I have a 36in Yates American Bandsaw that a forklift operator
dropped while loading. It was one the Navy owned during WWII that
sawed the decking for ships. I have another 36in that I need to
try to get working. I also have a 40 ton horn press. in
addition to the 40 ton ironworker. and a Warner swasey #2 turret
lathe, and somewhere around here is an old screw machine. There
is a couple of multiple spindle drills and all manner of old
machines.... There are not very many young folks that know how to
operate these old machines. Just not a lot of demand for one-off
repair work either.. Both old guys that were my teachers in my
machine work are now gone.. <br>
</p>
<div class="moz-cite-prefix">On 4/3/2020 10:46 AM, Stephen Offiler
wrote:<br>
</div>
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<div dir="ltr">I was just out on the factory floor and noticed one
of the CNC's was about to hit a bar change, and figured I'd try
to capture a video of the whole thing. It starts with a quick
overview of the CNC and the bar feeder sitting at idle. Then it
shows the part being made, which is the handle of our
double-ended machinist scribe. Then I fire it up to make the
last possible part before the bar is effectively consumed, then
we see a part being made, although it is kind of hard to see due
to the coolant splash. Then it does the bar change, consisting
of pulling back the "remnant" (the end of the bar that's now too
short to make another part) while dropping a new 12' bar,
engaging it, and feeding it into the machine to continue
automatic operation.
<div><br>
</div>
<div><a href="https://youtu.be/uy57CqHdicg"
moz-do-not-send="true">https://youtu.be/uy57CqHdicg</a><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>SO</div>
<div><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri, Apr 3, 2020 at 10:27
AM Stephen Offiler <<a href="mailto:soffiler@gmail.com"
moz-do-not-send="true">soffiler@gmail.com</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">Wow, Cecil, that's quite an equipment list!
Some big heavy stuff on that list! The only manual
machining I do is making little tools, jigs & fixtures,
and "my" shop here at work has just one (very nice) Hardinge
HLV-H "Super Precision" lathe, a 2J-head Bridgeport, a Kent
6x18 grinder, and a DoAll bandsaw. The magic is always in
the accessories; the 5C collets and the 4-jaw chuck for the
Hardinge, the R8 collets for the mill, the various precision
vises and other workholding for mill & grinder, indexing
heads, and a whole compliment of cutters, drills, taps,
wheels, etc etc.
<div><br>
</div>
<div>Oh and I do owe you a response on the ESAB plasma
cutter. Unfortunately, it's a pass. Sorry. We have this
one job we're developing now that involves making rather
precise cuts, but we're already down that road with a
chop-saw that's working quite well. We just do basically
zero with sheet material most suited for plasma.</div>
<div><br>
</div>
<div>SO</div>
<div> </div>
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<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri, Apr 3, 2020 at
9:54 AM Cecil Bearden <<a
href="mailto:crbearden@copper.net" target="_blank"
moz-do-not-send="true">crbearden@copper.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">I planned to open a
machine shop when I retired.. However, here in OK <br>
there is not much demand and the only jobs I had were
making some <br>
decorating crap for some traveling vendors. The biggest
job was wire <br>
forming for some Potpourri Pie holders. I had to build a
jig to bend <br>
the handles with an air cylinder and rack and pinion. Then
I had to roll <br>
a ring and weld it together with m spot welder then spot
weld the rings <br>
to the handles The handles were also the feet to hold it
above the <br>
stove burner. I lost the pics of it. I had a 20KW spot
welder and had <br>
traded for a 10hp Variable frequency driver and motor from
a technical <br>
school. I dropped the amperage with the variable
frequency drive to <br>
keep from burning the wires up. The wires were about 3/16
dia.<br>
It was fun for a while, then I felt like I was wasting my
talents on <br>
crap... Machine shops were closing down here to send
jobs offshore. <br>
So, I have a building with a 36x120 lathe, a 16x84 lathe,
a 9x40 lathe, <br>
a Cincinnati Mill with a 16x72 table and universal head,
2ea Kearney <br>
Trecker mills with universal heads, another later model
Cincinnati <br>
overarm mill with a 16 x 72 table, A Bridgeport, a couple
of knee mills <br>
one Japanese, the other old old US made. I did one job
with the newer <br>
Cincinnati overarm making T-nuts for a big holding table.
Now they just <br>
sit in case I need to make a part for my old junk. Then I
was going to <br>
build industrial engines, and bought the boring bars, head
work <br>
equipment and a big big crank grinder. Never got the
crank grinder set <br>
up. It is still on a trailer and a stray tornado took out
the building <br>
it was stored under.<br>
Cecil<br>
<br>
On 4/3/2020 7:01 AM, Mark Johnson wrote:<br>
> Hey - no problem with the CNC talk, at least not from
me. I've been a <br>
> software guy all my life but I find machining
absolutely fascinating - <br>
> wish I had learned more about it! I'm learning now...<br>
><br>
> Mark J<br>
><br>
> Columbia, MO<br>
><br>
> On 4/3/2020 5:38 AM, Stephen Offiler wrote:<br>
>> Hi John -<br>
>><br>
>> Hope the list will tolerate some CNC banter. We
have 1 job that we <br>
>> hold close, using .0001" offsets; all the rest it
would be more like <br>
>> .0005" or more. Swiss excels in small precise
stuff and also long <br>
>> slender stuff, and we are heavy on the latter.
Don't need all that <br>
>> precision, but it's handy to have: I can give
the guys setup sheets <br>
>> with .XXX" dimensions and no tolerance, and they
can hit the numbers <br>
>> dead-on quite easily. Keeps me from having to
even think about <br>
>> tolerances which is quite a luxury for an
engineer.<br>
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