> > You would have to turn the coolant off to measure, but have a look at > laser triangulation distance sensors: > https://www.micro-epsilon.co.uk/news/2018/2018-05-15-optoNCDT-1750LL/ > (specifically mentions grinding wheels)
Thanks for the link Andy. But these I assume measure distance, reflecting the beam against a surface and then receiving it and measuring the time elapsed between the two events am I right? I was thinking in something more like two IR barriers transversally crossed by the wheel. The problem is, this is just an idea it came to me because geometrically ,for me, this is the simplest way I came up with to measure the wheel radius only depending on the accuracy of the ballscrew and the motor driving it. But I don't really know if one can achieve good levels of repeatability with such a setup. El dom., 22 mar. 2020 a las 13:52, Leonardo Marsaglia (< ldmarsag...@gmail.com>) escribió: > You only need one beam. I would use the first beam interruption as a >> second home switch of sorts, setting that with the home_offset when you >> install a new wheel. The established home offset then becomes your new >> wheel reference. This should then be considered a fixed reference and a >> suitable distance from the work to prevent accidental contact during >> setup. > > > I was thinking about using the two beams that are transversally cut by > the well because that way I can measure the length of a circular portion > and have an exact measure of the radius independently of the home distance > or the part diameter being known. The only thing that would matter with > this approach would be to know exact distance between one beam and the > other and they off course must be perfectly perpendicular to the wheel axis > of movement. > > And obviously Leonardo, make a youtube video and tell us about it when >> its working. :) > > > Be sure I'll let you guys know as soon as I do something. In fact, I > can't wait to see and show you the mazak turning with LCNC. After that, I > hope I can start converting the grinder as soon as poosible! > > > > El dom., 22 mar. 2020 a las 10:41, Thaddeus Waldner (<thadw...@gmail.com>) > escribió: > >> The most >> > primitive idea I have is to measure the wheel before placing it into the >> > machine and then keep track of its diameter as it gets dressed. But >> > sometimes we have to adjust the offset of the dressing tool because a >> > diamond just detaches from the tool and then you need to correct for >> that >> > difference. >> >> I don’t know what the dressing system looks like, but if it’s motorized >> in both axis( cut depth and motion across the wheel) then why don’t you >> touch off the dressing point? You could do an initial homing when machine >> starts, and again after each dressing operation. Use the info to determine >> dressing point depth of cut and also to infer actual wheel diameter. You >> could also use it to catch the event of a diamond point being knocked >> loose, and alarm the operator. >> >> >> >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
