401 servo alarm fanuc 6t

[ncprecision]

I have a 1982 Mazak Micro slant 15 with the fanuc 6t control. The Machine
constantly is getting the 401 servo alarm only when bringing the x axis down. The alarm seems to occur when the machine idles for 20 minutes or longer. I just had both servo motors rebuilt and replaced the pulse coder on the x axis. Sometime the machine will run great for a day or two then the alarm comes back. Anybody with any suggestions would be much appreciated.

[Al_The_Man]

Hydraulic counter balance needs adjusting?
Al.

[ncprecision]

Thanks alot for the quick response. Is the hydraulic counter balance located
on the side of the servo? I see a small unit with hydraulic hoses running into it right next to the x axis servo motor.

thanks again
Shawn

[Al_The_Man]

It is usually below the servo, there is a Mazak procedure to set pressure whilst running the X axis up & down.
Al.

[ncprecision]

Is the procedure something I can find in the maintainence manuals and do myself or is it something a tech needs to do?

[Al_The_Man]

If you have the maintenance manuals it should be in there, I believe you just need a pressure gauge to read while adjusting the pressure.
Al.

[ncprecision]

Thanks for the info. I went to power up the machine and now it goes right into 401 servo before I even turn the hydraulics on. I opened the back door on the machine and noticed a red light (TGLS) lit up on what I believe is the servo amp board. The board is located on the other side of the velocity control. Would the TGLS light on pinpoint any one thing that could be wrong?

Thanks Again
Shawn

[Al_The_Man]

Check the 3 phase into the drive and also check the overload reset.
Al.

[akm36]

Sir,
I need the electrical wiring digram of Mazak make Micro Slant Turn 15 CNC Turning Center with Fanuc 6T. If some one has its machine manual and wiring diagram, pl. help me.
regards,
Mahajan

[yours_prabhat]

Originally Posted by akm36 Sir, I need the electrical wiring digram of Mazak make Micro Slant Turn 15 CNC Turning Center with Fanuc 6T. If some one has its machine manual and wiring diagram, pl. help me. regards, Mahajan

I can provide you the manual and electrical diagram for fanuc 6t my mail id is prabhatmishra@mail.com and contact number is +91-9430737981