Re: Haas Vf-4 Tool Change Problems
I could be wrong, but I don't think it is the encoder. On a 96, the encode that you are looking at is not what determines the spindle lock, the shot pin assembly does. On a 96, the external encoder assembly is for the rigid tap only anyway. Perhaps it is the switch that shows when the shot pin is engaged. If it already shows engaged, the spindle would not move.
Check for a worn shot pin and/or switch problem.
Mike
Two Haas VF-2's, Haas HA5C, Haas HRT-9, Hardinge CHNC 1, Bother HS-300 Wire EDM, BobCAD V23, BobCAD V28