RE: [CAD_CAM_EDM_DRO] Automatic or easier tool changes for R8mills ?

On Thu, 2003-11-06 at 14:31, Mike Gann wrote:
> The quick change draw bar article is in the Home Shop Machinist Nov-Dec 2002
> issue.
>
> Mike
>
> -----Original Message-----
> From: Mike Gann [mailto:mikegann@...]
> Sent: Thursday, November 06, 2003 1:21 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: RE: [CAD_CAM_EDM_DRO] Automatic or easier tool changes for R8mills
> ?
>
> It attached with threads. Roland made his own tool holders for the different
> sized endmills, center drills, drills, etc.
> The OD of these holders were 3/4" if I remember right and they had a larger
> OD down toward the tool end. He then had this lever/cam operated drawbar
> with a 3/4" R8 collet in the spindle. He could then loosen the draw bar,
> remove the current tool, slide in the new tool (with a positive stop against
> the larger OD of the tool holder and the collet), then flip the lever to
> engage the collet. The article indicated this setup gave good repeatability
> on tool lengths.
>
> The tool holders use the same basic shape as the ones Les Watts has on this
> page:
>
> http://www.lmwatts.com/forsale.html
>
> If I can find the issue I will let you know.
>
> Mike
>
> -----Original Message-----
> From: Kim Lux [mailto:lux@...]
> Sent: Thursday, November 06, 2003 1:12 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: RE: [CAD_CAM_EDM_DRO] Automatic or easier tool changes for R8mills
> ?
>
> Thanks, Mike.
>
> Does anyone know of the exact issue ? I used to subscribe to HSM...
>
> Did the drawbar attach with threads or with a pull nipple ?
>
> Kim
>
>
> On Thu, 2003-11-06 at 13:52, Mike Gann wrote:
> > We use the Royal system - it makes easy and fast tool changes. The tool
> > holders are on the expensive side. I know there is also a locking screw
> you
> > should tighten when making a heavy cut with a face mill or even a 5/8"
> > endmill. That would slow down the change a little, however we just make
> > prototype parts and never push it that hard anyway.
> >
> > Did you see the article is Home Shop Machinist magazine where Roland
> > Friesand (sp?) made a "quick change" tool holder system using a lever and
> > cam operated draw bar? I know it was in the last year, but I am not sure
> > which issue. You might get some ideas from that.
> >
> > Hope that helps,
> >
> > Mike
> > -----Original Message-----
> > From: Kim Lux [mailto:lux@...]
> > Sent: Thursday, November 06, 2003 12:23 PM
> > To: CAD_CAM_EDM_DRO@yahoogroups.com
> > Subject: [CAD_CAM_EDM_DRO] Automatic or easier tool changes for R8 mills ?
> >
> > Hi people.
> >
> > We are getting tired of changing tools with the manual drawbar on our
> > R8 equipped CNC'd mill. Does anyone have any experience/ideas with
> > implementing a quick or automatic tool change with R8 collets ? The
> > first step in the automatic change would be to come up with some sort
> > of quick change collet system.
> >
> > I know of two: the air wrench powered drawbar looseners/tighteners and
> > the the Royal system whereby the R8 collet is a holder for another
> > collet system.
> >
> > I'm thinking something along the line of adding a pull nipple on top of
> > the R8 collet and pulling it up with an air powered drawbar something
> > like how the Cat40 system works.
> >
> > Failing to find something that works for the R8, our next mill will
> > have a Cat something taper...
> >
> > Thanks.
--
Kim Lux <lux@...>