what about sliding a pin into the turret when its in place to lock it? then
no lifting is needed, just rotate about it's axis and lock. maybe pins
coming in from the sides in multiple locations to help rigidity? a
mechanism similar to the self centering thing on tap wrenches, the outward
spiral type guide... then you rotate that ring to engage the pins... taper
the entrance to the pin holes on the turret to allow it to pull into place
if it's indexing isnt the greatest. I would try to rough out a quick
drawing to try to help depict my thoughts but i guess i dont have any cad
installed on this computer, so i hope you're able to visualize what im
trying to describe. it actually looks kinda purdy inside my head, assuming
the mechanism would actually work.
on a side note... when you huys see HAL, do you think of it as 3 letters,
like LED or SUV, or d oyou think of it as a single word, like the name...
kinda like shallow Hal? noticed you referred to it as "an HAL module" and
i usually think "a HAL module" which would imply it's being said as if it
were a name. Not like it really matters, just the thoughts churning in my
head....
Jim
On Fri, Mar 7, 2008 at 7:03 PM, Kirk Wallace <[EMAIL PROTECTED]>
wrote:
> On Fri, 2008-03-07 at 17:05 -0500, Dave Keeton wrote:
> > If it is like a Barrafaldi or a Duplomatic I can help......I have
> installed
> > both of these.......It looks alot like them and I would assume they use
> the
> > same kind of encoder. Reading the encoder is fairly easy using ladder,
> If
> > you happen to have FAPT Ladder III editing software I can send you what
> I
> > wrote for this. I installed a Duplomatic turret on a Fanuc 21i TB
> controlled
> > lathe about 6 months ago. Alot of these turrets are built and operate
> pretty
> > much the same. I can get you the time and operation sequence if you need
> it.
> > Timing on these turrets is critical. Control (including propagation
> delay)
> > should be very accurate to +- 10ms or it will mis-index. What questions
> do
> > you have?
>
> I have my Hardinge HNC turret working through an HAL module. Part of
> what makes EMC and HAL so cool is that it allows someone with my skills
> to make it work.
>
> I am looking for general design examples, in order to try to come up
> with a design for lathe tool changers for Sherline and bench-top class
> machines. The issues that are bothering me now are how to stop the
> turret in eight positions, with high accuracy and rigidity. The Hardinge
> accomplishes this by having just one broad and short zero clearance
> interface between the movable turret table and the carriage. Plus a
> pneumatic piston which clamps evenly across the table. I won't be using
> pneumatics, so I can't utilize the Hardinge design for clamping. And the
> other examples I have seen don't have the two direction motion (rise
> rotate, park) of the Hardinge, suggesting a different internal design
> altogether.
>
> Checking the Barufaldi and Duplomatic links:
> http://www.baruffaldi.it/eng/interne/prodotti/macchine_utensili/index.html
> http://www.duplomatic.com/duplomatic/auto/uk/2/frame2.html
> reminded me that I need to worry about live tooling too. ;)
>
> --
> Kirk Wallace (California, USA
> http://www.wallacecompany.com/machine_shop/
> Hardinge HNC lathe,
> Bridgeport mill conversion, doing XY now,
> Zubal lathe conversion pending)
>
>
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