[chipsinpan]

does the spindle orient to the tool change position ?
it should make a 1/2 revolution until the roller on the air cylinder engages a detent on the spin orient plate . Then a prox switch on the air cyl signals the arm to swing .
If you take off the fibreglass cover on the head , and look inside , you will see the air cyl assembly below the belts .
If any one has moved the head , it is possible to hav cut the wire to the prox switch . It is quite delicate , and easy to cut if you lift the head up before cutting the wire tie holding it away from belts .
Prox switch is expensive , but you can solder a cut wire back together /shrink wrap , if you have steady hands .
Home sequence on the tool drum is in the utility screen ( I think )
UTIL /TOOL/ HOME . this is the screen that has CCW, CW and HOME .
HOME will make the drum make 1 full revolution until it sees the home marker .

CW/CCW button will make the drum rotate 1 tool position . This is for when you want to load tools in the drum without doing an MDI.
Also very dangerous to do as it will cause the control to lose track of which tool is active . THIS IS HOW YOU CRASH TOOLS! always do a tool drum home after doing this .
This is also why the control keeps asking you to confirm which tool is in spindle at the start of a pgm , or when you set your Z offsets .
A quick way to check is to see if the main screen tells you which tool is active . If it says tool #0 then it is confused and is protecting itself until you home the drum .
Hope this helps
CHIP