Hi, can you post some pictures from the spindle internals. The rotor of the spindle is moving lilt bit down when the hydraulics push the drawbar to relish the tool. I wonder if the bearings take all the force from the tool change or the rotor is resting on the stator during tool change.
You can clearly see this down movement of the spindle when the drawbar is pushed in some others spindle too.
NVX 5100 2nd Generation デモワーク/ Demonstration workpiece - YouTube
0:19
Kyocera Cutting Tools MFAH & MEC - Aluminium Solutions - YouTube
0:52
DECKEL MAHO | DMU 50 EVO linear (Year 2005) - 5 axes machining center - KISTNER Machine Tools - YouTube
0:43
Drimaropoylos John
You can clearly see this down movement of the spindle when the drawbar is pushed in some others spindle too.
NVX 5100 2nd Generation デモワーク/ Demonstration workpiece - YouTube
0:19
Kyocera Cutting Tools MFAH & MEC - Aluminium Solutions - YouTube
0:52
DECKEL MAHO | DMU 50 EVO linear (Year 2005) - 5 axes machining center - KISTNER Machine Tools - YouTube
0:43
Drimaropoylos John