On 16/02/16 12:26, Bertho Stultiens wrote: >> The alternatives seem to have the same problems of repeatability. Using >> > a hall sensor or optical one will give the same problems. Micro-switches >> > are at least inherently mechanically constrained. > Indeed, unless you can crush them. There must be a run-into-the-wall > protection, as mentioned earlier, to prevent killing your switch.
The problem on the Taig is while one hits the end stop one end, you come out of the nut the other ;) But while stalling the motors looses position, it's not a particular problem from the safety point of view. Unless you put a finger in the way ... I've been looking to fit slotted sensors as limit switches to prevent problems at both ends of the table, with a flag on the bed which goes through the sensor (so no crush problem), and this is fine for limiting things, but it's repeatability is somewhat suspect for use as a home position. I was seeing 0.1mm drift depending on various factors, but not being desperate for it I did not investigate further. -- Lester Caine - G8HFL ----------------------------- Contact - http://lsces.co.uk/wiki/?page=contact L.S.Caine Electronic Services - http://lsces.co.uk EnquirySolve - http://enquirysolve.com/ Model Engineers Digital Workshop - http://medw.co.uk Rainbow Digital Media - http://rainbowdigitalmedia.co.uk ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
