> On Thursday 03 September 2020 22:23:07 Ken Strauss wrote: > > > > -----Original Message----- > > > From: John Dammeyer [mailto:jo...@autoartisans.com] > > > Sent: Tuesday, September 01, 2020 1:03 AM > > > To: 'Enhanced Machine Controller (EMC)' > > > Subject: Re: [Emc-users] Tool presetter > > > > > > > -----Original Message----- > > > > From: N [mailto:nicklas.karlsso...@gmail.com] > > > > Sent: August-31-20 9:21 PM > > > > To: Enhanced Machine Controller (EMC) > > > > Subject: Re: [Emc-users] Tool presetter > > > > > > > > > I have one of these. > > > > > Fowler 54-575-600 Electronic Edge Finder with Cylindrical Tip, > > > > > 0.200" > > > > > > Stylus, 1/2" Shank > > > > > > > > I use it with the Shumatech DRO to find edges or the center of > > > > something > > > > > round. The DRO-350 has a feature for that. Eventually > > > > > > > I'll wire up a cable that can be sensed by LinuxCNC to detect the > > > > edge > > > > > > automatically. > > > > > > > Was also thinking about a cable, however need to connect it each > > > > time > > > > > > otherwise tool changer will slowly turn it into a twisted cable. > > > > > > > Expect they are more or less equally good as 3D taster but much > > > > cheaper. > > > > > > Nicklas > > > > > > You make a good point. It should be possible to make some sort of > > > holder which fits around a TT mill holder shank. The holder could > > > have a small > > > > Blue > > > > > Tooth Low Power module that signals contact. > > > > > > The issue might be response time. Or noise that delays the contact > > > > signal > > > > > long enough to break the probe. > > > > It takes *VERY* little overtravel to destroy the tip of a small > > carbide endmill. I wouldn't consider touching off onto a plate lacking > > some sort of movement after contact with the endmill. > > > I have used a small bit of pcb material for a G38.2 contact. With the > spindle turning backwards, its .0001" accurate and lasts till I goof up > and destroy it. It registers contact for TLO setting with .0001"
>From the discussion I conclude electric contact measurement is good and these >these cheap edge detectors are probably very good. And even though first time >I run machine I made a rather deep dent in a piece of wood with the chuck, I >could hear the wood break I make conclusion there is no need for spring if >right done with a little bit of care. Nicklas Karlsson _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
