Hello! I have a question about a machine that I converted to LinuxCNC 5 or 6 years ago. It is a 4 axis mill that is used for making jewelry - milling wax parts that are then turned into nice things with lost-wax technique.
The issue is that Z axis is losing height. That is best observed, when the milling is done with rotary head. Here is an example - the height difference of first passes vs last passes is approximately 1 mm: https://www.picpasteplus.com/v.php?i=507b0d6be4 The thing is that the client told me about this problem few years ago, but then it somehow disappeared or at least the position error was not that huge and it was possible to fix the wax part before proceeding. Machine is running 2.7.4 version. Here are the INI and HAL files: https://pastebin.com/N7tk8nnW https://pastebin.com/epyUVbpp I am convinced that all the possible mechanical causes have been checked. For the final check, we brought Z axis to particular position, marked motor shaft placement regarding motor case, then did the milling and afterwards brought it back to the same position - marks on motor shaft _did not_ match the case. I changed the feedrate and acceleration values 2x lower just to make sure that machine was not missing steps. Or is it still missing steps? So I would like to ask for some ideas, what else should I try and where to look. Viesturs _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
