[AT] OT: non-tractor covid-19 activates

Sat Apr 4 10:29:41 PDT 2020

Steve: thanks for all the video and manufacturing information. I'd seen
shapers sitting around and knew generally how they worked (from a retired
machinist/engineer/shop wizard neighbor) but this is the first time I've
seen one in action. My son and I watched the machine work

The new neighbor has 4 Haas and a Brother for CNC equipment now; any of
them are impressive to watch but the Brother is a step up (to me anyway).
Fast and efficient. Of course, the neighbor is pretty fastidious and cares
for his equipment well too.

Jim: the neighbor fought with the coolant mist in his shop; it was wrecking
the AC filters and getting into everything until he got a HEPA filtered
system for abating the mess. Didn't take long before he had them on all the
machines. Afterward the filters in the AC system would actually last a
decent amount of time (rather than daily replacements). It might not apply
to what you were doing (since the CNC's are fairly well enclosed) but I
know it bothered him until he found and installed the filtration systems.

very informative. Thanks!

Ken in AZ

On Sat, Apr 4, 2020 at 7:54 AM Jim Thomson <macowboy at comcast.net> wrote:

> Steve,
>
>   Great video! Do you have any mist collection or is it not enough to
> warrant a system? In 2008 I worked in a large Swiss Screw house. There was
> a oil haze everyday about 6 ' above the ground in the winter months. I
> would come home smelling like cutting oil. Those were the days.
>
> Jim Thomson
> Rehoboth, MA
>
> On April 3, 2020 at 11:46 AM Stephen Offiler <soffiler at gmail.com> wrote:
>
> 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.
>
> https://youtu.be/uy57CqHdicg
>
>
> SO
>
>
> On Fri, Apr 3, 2020 at 10:27 AM Stephen Offiler < soffiler at gmail.com>
> wrote:
>
> 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.
>
> 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.
>
> SO
>
>
> On Fri, Apr 3, 2020 at 9:54 AM Cecil Bearden < crbearden at copper.net>
> wrote:
>
> I planned to open a machine shop when I retired..  However, here in OK
> there is not much demand and the only jobs I had were making some
> decorating crap for some traveling vendors.  The biggest job was wire
> forming for some Potpourri Pie holders.  I had to build a jig to bend
> the handles with an air cylinder and rack and pinion. Then I had to roll
> a ring and weld it together with m spot welder then spot weld the rings
> to the handles  The handles were also the feet to hold it above the
> stove burner.  I lost the pics of it.  I had a 20KW spot welder and had
> traded for a 10hp Variable frequency driver and motor from a technical
> school.  I dropped the amperage with the variable frequency drive to
> keep from burning the wires up.  The wires were about 3/16 dia.
> It was fun for a while, then I felt like I was wasting my talents on
> crap...  Machine shops were  closing down here to send jobs offshore.
> So, I have a building with a 36x120 lathe, a 16x84 lathe, a 9x40 lathe,
> a Cincinnati Mill with a 16x72 table and universal head,  2ea Kearney
> Trecker mills with universal heads, another later model Cincinnati
> overarm mill with a 16 x 72 table, A Bridgeport, a couple of knee mills
> one Japanese, the other old old US made.  I did one job with the newer
> Cincinnati overarm making T-nuts for a big holding table.  Now they just
> sit in case I need to make a part for my old junk.  Then I was going to
> build industrial engines, and bought the boring bars, head work
> equipment and a big big crank grinder.  Never got the crank grinder set
> up.  It is still on a trailer and a stray tornado took out the building
> it was stored under.
> Cecil
>
> On 4/3/2020 7:01 AM, Mark Johnson wrote:
> > Hey - no problem with the CNC talk, at least not from me. I've been a
> > software guy all my life but I find machining absolutely fascinating -
> > wish I had learned more about it! I'm learning now...
> >
> > Mark J
> >
> > Columbia, MO
> >
> > On 4/3/2020 5:38 AM, Stephen Offiler wrote:
> >> Hi John -
> >>
> >> Hope the list will tolerate some CNC banter.  We have 1 job that we
> >> hold close, using .0001" offsets; all the rest it would be more like
> >> .0005" or more.  Swiss excels in small precise stuff and also long
> >> slender stuff, and we are heavy on the latter. Don't need all that
> >> precision, but it's handy to have:  I can give the guys setup sheets
> >> with .XXX" dimensions and no tolerance, and they can hit the numbers
> >> dead-on quite easily. Keeps me from having to even think about
> >> tolerances which is quite a luxury for an engineer.
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