Mazak SQT-10 tool change problem?

[SpufuZ]

Hi!
I have a problem appearing sometimes when we make a tool change on a SQT-10 lathe.

We get the error code "272 Turret index exceed time".

Could this be related to the servomotor encoder, or maybe mechanical?
Any suggestions of where i can start troubleshooting?

Best regards
//David

[girishdk]

Hi,

Problem could be either the Indexing speed is slow or the PLC timer for timeout is set too low.

Which controller is this machine with & any idea of the drive / motor for turret. Is it 640 with MR-J2 CT drive for turret?

Best Regards,

Girish

[SpufuZ]

Thank you for answering!
Im not possible to check what drive/motor it is right now, but i will be able to do so tomorrow (saturday) morning.

I just found out by the operator that the turret seems to rotate to far when rotating to the programmed tool numer.
It according to him, the turret stops right between two tool positions.

As i said, i will come back tomorrow with some more info.

//david

[SpufuZ]

Im at the machine right now, and can see that the turret is rotated by the hydraulic index motor and the index encoder does not look so good.
Theres an fine oilfilm on the inside that i thought might disturb the optical function of the encoder.
I will try to replace it if we have a spare one, or maybe clean the one we have and see if the problem disappears.

//david

[girishdk]

Hi,

I feel you are on the right track. If the turret is over shooting the commanded station & stops in between with below alarm, encoder feedback seems faulty.

Best Regards,

Girish