Re: [multimachine] Re: Vertical Lathe
- Hello CostasI need a machine to make some good size parts on.Some are 275mm square and 40mm thick, with a 100mm bore.HRS A-36 is the common description for Hot Rolled Steel in the USA.It is the steel with the black coating on it.Keith
cvlac <cvlac0@...> wrote:Ok boys,I admit that the machine that you want to build ,depends of
the work to do.But I insist, that vertical lathes are used to machine
heavy blocks of steel, or very large things .And of course larger than
10".up to 10-12 " you can work easily with the MM.After that you have
an other problem to solve.You can't find in the market so easily , big
and very heavy pieces of steel to work in a vertical machine.Generally
this is done by professionists that have their small or big foundry in
shop and are able to cast large steel works.
An other question for Keith:what is the HRS A-36 ?
Good morning from Rodos.
--- In multimachine@ yahoogroups. com, keith gutshall <drpshops@.. .> wrote:
> Hello Costas
> I do not see it any harder that the MM assembly.
> Any time you set up a machine when you assemble it error are
going to show up.
> When you start to put parts on the block if you did not check the
assembly it may not be square.
> I have some HRS A-36 it varies .007 undersize to .022 oversize.
That much is going to greatly effect the accuracy of the machine
> cvlac <cvlac0@...> wrote:
> Hi Keith
> I don't understand the purpose to make this arrangement. Vertical
> lathes generally are used to machine very heavy works , not very long,
> and over 500 Kg.Most of them , they have the cutting tool turning
> around the work,and the only adjustment to do, is to center the work
> to a big circular plate in a way to avoid to cut too much material
> when centering the work.
> By doing this MM setup, you loose the big MM advantage of the
> perpendicularity of the spindle and the slide.So you have to be faced
> to a big series of adjustment works like Rick .
> --- In multimachine@ yahoogroups. com, "drpshops" <drpshops@> wrote:
> > Hello Pat
> > You have been asking about a machine to turn large stuff?
> > How about a vertical lathe?
> > I worked in a shop and they had a verticial machine that turned
> > 30 in dia. parts.
> > The engine block would form the upright column, with the the ways
> > bolted to it.
> > The spindle could be made from a auto spindle, with the chuck bolted
> > where the wheel normally at. You could use a 10-12 in chuck on it.
> > I have not worked the details out,but it concept I have been kicking
> > around.
> > Keith
> Deep Run Portage
> Back Shop
> " The Lizard Works"
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- Lance wrote:
>> Also if you have no type of regulator in the output youWith an unregulated output, you won't ever get a good weld.
>> need a reactor 6mH in series
> I don't understand this.
> Why would I regulate the output and what is a 6mH?
A 6 millihenry choke is an inductor (figure wire would around a steel
core) which makes the arc much more stable. When the current starts to
drop, the inductor puts more voltage across the arc to keep it going.
> I was to understand that output amps were regulated by applied field amps?Partially. Both output voltage and current are affected by field current.
> Is this incorrect?Yes, a stick welder wants a constant current source, an alternator is
not constant current or constant voltage.
David G. LeVine
Nashua, NH 03060