C axis not goes to zero position

[Braided]

Hi all friends
I hope anyone can guide me here about C axis.I have a Takang TNC-20N with Fanuc OTC controller.when i start work on it no parameters was there in the machine i have all books diagrame and parameters wite but bad luck no 900 was in the book so i get same Machine 900 parameters and put all diagnostic put also.My machine has C axis but the 900 where i get not have C axis this time no alarm on the machine and X and Z axis goes to refrence return ok spindle working fine but when i choos for C axis to go zero brake work and it stuck little bit noise for move but brake not released that's why not perform zero position of C this is C is for spindle rotating on 360 degree the machine is not showing C on display can any one help me please very greafull to you all

 

[sinha]

C axis works when spindle-positioning mode is selected, usually through an M code.

 

[Braided]

There is two fanuc alpha drives in the electric panel i see when i Operate spindle on jog mode then main spinde amplifier shows 00 on amplifier display when i Operate C on jog then also same amplifier show 00 digits on display and speed he start very high.
C axis amplifier still show -- no alarm

 

[Braided]

C axis works when spindle-positioning mode is selected, usually through an M code

And also my machine not allow me to use MDI mode before complete the zero return now C axis not goes to zero position that's why i can't use MDI mode is this some setting i can use MDI without goes to zero because i see some machines has setting to use MDI mode without go to zero
Or can we bypass or disable the C axis