X home position in the diagram is referring to the final home position. The measurements 4 and 10 are the trip pin to limit switches measurements, which is an easy way to physically measure them.
The home position was just set at 6" arbitrarily. When you hit the home switch you establish the origin (which everything is referenced from) but the origin can be anywhere, it doesn't have to be at the switch trip location. The other two homing switch diagrams are newer and should give more detail. Homing is complicated! Chris ________________________________ From: Reinhard <reinha...@schwarzrot-design.de> Sent: July 13, 2020 2:31 PM To: EMC developers <emc-developers@lists.sourceforge.net> Subject: [Emc-developers] problem understanding diagram from help-pages of pncconf Hi, I just tried to translate the help-pages of pncconf, when I realized, that I don't understand the mill picture. In my understanding, homing an axis means, that the axis moves until the home- switch signals contact. No matter what or where the home-switch is - whether it is shared limit switch or separate ... So when the home-switch signals contact, then that is my home position, which according to the picture of pncconf is identical to the axis origin. I don't see the 6" home position. The value of 6" is based on capriciousness, as it can't be measured. How can I explain that position to a newcomer of linuxcnc if I don't understand it? I would understand the picture, if the home position would be called predefined position (which could be reached with G28 or G30), but Home Position is quite different from that. cheers Reinhard _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
