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
