> Retracting to touch off, if you have backlash, is more error prone. I was wondering about that, but did'nt want to delve into backlash because it's a long seperate topic, but;
Surely, it's even worse to set Z on approach on a vertical mill if you have backlash, because during or at the end of milling, your milled Z height will be = Z+backlash because the head will descend during milling. ? >It's a bit more problematic with a mill, not as easy to measure the >thickness accurately after a cut with the work clamped to the table :) Not sure what you mean here. The dowel is loose, in your hand. You slip it between the tool and a flat piece on the work, or reference area. It's very easy;-) Regards Roland On 27 March 2011 10:30, Steve Blackmore <[email protected]> wrote: > On Sun, 27 Mar 2011 10:03:07 +0200, you wrote: > > > >Use a say, 1/4in ground dowel. Bring the z down to about 3/16th and then > >gently try to roll the dowel under the bit as you RETRACT the Z. Because > of > >the curve, you get a good idea as to when to the last few steps are. Even > if > >you overshoot upwards, you're pretty close to target when you repeat the > >operation. It will also accurately take the sharp, lowest point tips of > the > >cutter into account, unlike the paper that is apt to get pierced. > > >There is also the issue of backlash, but that affects things through > milling > >or setting the Z. > > Retracting to touch off, if you have backlash, is more error prone. > > On a lathe it's easy to take a cut and measure the diameter then enter > that value in the X touch off. With Z, it's pretty usual to have to face > the end, then if you touch that off to 0 your done. > > It's a bit more problematic with a mill, not as easy to measure the > thickness accurately after a cut with the work clamped to the table :) > > > Steve Blackmore > -- > > > ------------------------------------------------------------------------------ > Enable your software for Intel(R) Active Management Technology to meet the > growing manageability and security demands of your customers. Businesses > are taking advantage of Intel(R) vPro (TM) technology - will your software > be a part of the solution? Download the Intel(R) Manageability Checker > today! http://p.sf.net/sfu/intel-dev2devmar > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Enable your software for Intel(R) Active Management Technology to meet the growing manageability and security demands of your customers. Businesses are taking advantage of Intel(R) vPro (TM) technology - will your software be a part of the solution? Download the Intel(R) Manageability Checker today! http://p.sf.net/sfu/intel-dev2devmar _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
