> Date: Thu, 16 Aug 2012 09:37:39 -0500
> From: [email protected]
> To: [email protected]
> Subject: Re: [Emc-developers] [ emc-Feature Requests-3558468 ] Tapping for
> floating holder and no spindle encoder
>
> On Thu, Aug 16, 2012 at 04:07:10PM +0200, andy pugh wrote:
> > On 16 August 2012 15:58, SourceForge.net <[email protected]> wrote:
> >
> > > Emc could benefit from a tapping cycle that does not rely on a spindle
> > > encoder but instead uses floating taping heads.
> >
> > How does that work? Do you have to assume that spindle speed is
> > approximately correct, and not care too much about the tapping depth?
> >
> > Or is this for use with the friction-reversing heads? (though I still
> > wouln't know how to control depth)
>
> For a tension/compression tapping head, the cycle would need to
> reverse the spindle at the bottom, and the feed and speed would need
> to be matched proportionally according to the pitch. It's tricky to
> track during the reversal, especially if your spindle doesn't
> accelerate very fast.
>
As I said I have never tried this, but I have read about it.
I thought the whole point of the floating tapping head was so that the spindle
and axis
don't need to be synchronized.
In fact have read about setting the reversing axis feed slightly less then the
pitch, just to
compensate for the acceleration time of the spindle.
How would spindle-at-speed be handled during float tapping?
While you would want to wait for the spindle to be up to speed before entering,
you wouldn't want to wait for it when reversing...
Thinking out loud..
Chris M
------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
Emc-developers mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-developers
