CNC Machine Controls are somewhat Generic as they can be Adapted to Different Machines by Changing the Stored Parameters & Macro Programs that tell Control how to run a Particular Machine.

This Special Parameter & Macro Program Information is Custom Written by the
Manufacture of Your Machine Tool 
( Not the Control Manufacturer! )
Specificity for each Model Machine Tool.

If this Control Information is Ever Lost Your Machine Will Not Run Until it is Correctly Replaced!

In Early Strippit  HECC80/1 Type Controls this Information was in Non-Volatile  EPROM  Memory that could Store it Correctly for Decades even with No Power to Control & Machine.

Later Strippit  HECC80/3 Type Controls and  Fanuc GN6 Controls Stored this Data in  Bubble Memory that also required No Power to hold it for Decades.

The Fanuc OP Control was used by Strippit,  Amada,
and other CNC Machine Tool Companies in Late 1980's and 1990's.   The OP is a Good Control,  but
it Stores Critical Parameters & Macro Programs in Volatile,  but Battery Backed-Up  RAM  Memory.

Strippit  &  Fanuc  Poorly Document the Fact that You are Suppose to put New Batteries in Control Every Year.    And let's be Honest Here,  if you even Have the Strippit & Fanuc Controls Books,  Nobody at your Company has Ever Read Books anyway.

So, Sit Down on Floor and Read the Hard-To-Read Printing Molded into Black-Cover in Lower Left Side of your Control,  Like Control in the Photos.   It says Change Batteries once a Year and to be sure
Control Power is On when Replacing Batteries.

When Control is On,  Power is Supplied to RAM Memory to keep Data Stored.   When Control Power is Off,  the Batteries take over to keep Data Stored.   But if you do not change Batteries once every year,  eventually Batteries Wear-Out and your Data will be Lost and Machine will Not Run.

Typically,  Machine Manufactures Supplied Disks or Printed Copies of Data so a Good Technician could Reload Lost Control Data.   But you Probably Lost Data when you Lost Manuals.    If you do not have Data Copies and if the Machine Company has Gone Out Of Business or Can't Supply Correct Data, 
your Machine Tool is now Scrap Metal.

Typical Symptoms are  100  and  101  Alarm Error Code Messages on Control CRT Display.    There is Sometimes a  "Low Battery"  Message on Display.
So,  before this Happens,  I Advice;

1 -- Change The Control Batteries!!!

2 -- Download Copies of ALL Parameters and Macro
      Programs to a PC Computer and Store in
      Safe Places.   You may need an Experienced
      Fanuc Control Technician to get All Data!!!

To Change Batteries;
1  --  Turn-On Control
2  --  Leave The Control On!!!
3  --  Remove the Black Battery Cover.
4  --  Remove the  3  "D"  Batteries.
5  --  If Battery Holder Contacts are Dirty or
        Corroded,  Clean with a Scotch-Bright Pad.
6  --  Put in 3 New Alkaline Batteries.
        Do Not use Rechargeable Type Batteries!
7  --  Make sure you Orient Batteries in Correct
        Direction,  so that Plus & Minus are Correct!
8  --  Replace Cover.
9  --  Tape a Paper-Log to Control showing Date
        Batteries were changed so you know when to
        change them again,  like this Customer taped
        on Front Right of their Control.

Strippit  &  Fanuc  OP-Control Battery Problems 
and  Repair Resources
Note #1
Be Very Careful Buying a Machine Tool that has Battery Backed-Up Memory that has been Disconnected and Stored in a Warehouse.   These Machines,  Typically Sold By Used Machine Dealers,  often have "Lost"  Books & Manuals,  Lost Control Data Disks & Print-Outs,  and the Controls has Lost the Parameters & Macro Program Data because it may Not have been under Power for Years.    Make Sure you get an Iron-Clad Warranty that the Control & Machine will Run,  and make the Dealer Supply the Books & Manuals & Data Copies,  or do Not Buy the Machine.

Note #2
General Electric 1050 CNC Controls from the Late 1970's and 1980's also have Battery Backed-Up Memory.   But G.E. was Clever,  and had 2 Sets of Batteries.    1 set of  "D"  batteries in a Holder inside Control.    And a Second Small Lithium or Alkaline Battery Hidden in the Backside of the Cardcage Backplane.   Consult your G.E. Control Books and have an Experienced Technician Change these batteries without Dumping this Critical Data.
This page was last updated: April 26, 2015
Global 20  &  Global 30  Encoder Battery Problems

Starting about 1999,   LVD Strippit  Co.  built  "Global"  ( and Other?)  Machines that used
Battery Backed-Up  Fanuc  Absolute Encoders on the Machine's  X,  Y,  T,  and  C  Axis.

These  Absolute Encoders are Programmed with the Correct Values for 
THIS  Particular Machine's   Zero  &  Home  Positions.

If  A.C. Power is Maintained to Machine,  there is Power available to the CNC Control to Maintain these Stored Values.    When  A.C. Power is off for a relatively short period of time, 
the Special Fanuc Batteries for each Axis will maintain the Stored Encoder Position Values.

However,   when  A.C. Power is off to Machine for an Extended length of time, 
such as when Machine is  Stored  or  Sold & Moved,  
Batteries may go Dead and Stored Position Data in the Absolute Encoders will be Lost.

Machine Will Not Run At All If This Encoder Position Data is Lost!

At This Point,   Repair will require replacing the Expensive Special Fanuc CNC Control Batteries,
and a Service Call by a Experienced Serviceman to Determine the Proper Values for Each Axis,
and then Reloading Proper Values into Encoders.

Ask your Serviceman to  Write-Down what this Stored Position Data  is for the  X,  Y,  T,   &  C   Axis on Your Machine so that it could be easily Reloaded if lost in the Future!

Traditionally,  we Advise Turning-Off  A.C. Power to Machine at Night & Weekends as this Helps protect against  Power-Surges  &  Lightning-Strikes.   But Batteries will slowly Drain whenever Power is Off to the Machine.    Consult   LVD Strippit Co.  &   Fanuc  Co.  Control Manuals for the
Best-Practices on this Matter for your Machine & Control.

I would also Change the Special Batteries every year or so.    You have been Warned......

Fanuc Repair Parts & Repair Services on
CNC Controls and Servo Drive Systems

I don't particularly like the Fanuc Company and some of their business practices.
But with help of  Neutron Jack Welch  at  General Electric  who Destroyed the U.S.  CNC Control Industry,  Fanuc  is now the Biggest CNC Control Manufacture in the World,  and Most Strippit and Other Machine Tools Now come Standard with Fanuc CNC Controls & Servo Systems.

We,  here at Machine Technologies Co.,  do NOT provide Fanuc Parts & Service, 
as there are plenty of other Servicemen & Service Companies that do.

So,  Here are some,  but certainly not all,
Resources for Fanuc Repairs & Repair Parts;

Lakeside CNC Group Inc.   ---   Bensenville, Illinois   Phone 630-616-0039
Specializes in Fanuc CNC Electronics,  Servo Drives & Motor Sales & Repairs.

Repair Zone  ---   Bay City, Michigan   Phone 866-237-3212
Specializes in Servo Drives,  and Servo Motor Sales & Repair Service.

General Servo & Spindle Motors   ---   South Elgin, Illinois   Phone 630-889-9261
Specializes in Servo Motor and Spindle Motor Repair.

CNC Engineering Inc.   ---   Enfield,  CT   Phone  860-749-1780
Specializes in Fanuc Control Retrofits as well as Electronic & Motor repair parts.

Dynamic Displays   ---   Eau Claire,  WI   Phone  715-835-9440
Specializes in Retrofitting LCD-Displays for Old Control CRT-Monitor Displays.

Qualitrol International   ---   Charlotte,  NC   Phone  877-536-0090
Specializes in GE Fanuc CNC Repair Services & Repair Parts.

FANUC America Corporation   ---   Hoffman Estates, Illinois   Phone 888-326-8287
Official Fanuc Parts & Service in the U.S.

Note,  in 1970's & 1980's,  Fanuc used the More  "American Sounding"  Name of 
"General Numeric"  for it's U.S. Division.  General Numeric was & is Fanuc. 
This General Numeric name has now been dropped.