thanks very much for your reply
i did the same , and now machine is running Ok
i found a new problem where the machine is not executing the thread
i don't know why ?

i checked the motor coupling , it is no problem i checked the 2 limit switches on the other side from the turret i seems the problem is the round cam activating the limit switches the cam is contentiously pressing on the zero point limit switch , i will reduce the diameter of the cam and check again...

dear there , i have 270 pro machine ,when i select a tool i find it is not stopping in the same position every time if i select tool 1 ,i find it shifting from the tool home position this shift is accumulated every time i select the tool this makes the tool can not reach the surface of the billet an...