Strippit Bubble Memory Fixes Strippit_Bubble_Memory_Fixes
Strippit  Houdaille
HECC80/3  Bubble Memory Controls
D.C. Power Supply
Adjustments  &  Preventive Measures
This page was last updated: August 9, 2016
Above is a FC1000/3 Servo & Control Cabinet Installation Diagram,  From a
Strippit Serviceman's News Letter I Published at Strippit Co. in the Early 1980's.
2 --- Make sure  8 foot Ground Rod is Installed & Attached Tightly to Machine's Ground-Strap!

3 --- Check Internal Control A.C. Voltage.    This is Very Important!!!
       It should be about  115  to  125 V.A.C.,   if it is Higher or Lower,  have a Good 
       Technician Change the Transformer-Taps  (in the Servo Cabinet)  to Fix it!

The Purchasing Dept. at Strippit bought some Transformers  (To Save Money?)  that Did Not have the Standard Plus & Minus Taps that we use to Correct High or Low Voltages.

Some Used Machines that I have worked-on were Installed where Incoming A.C. Voltage was Only 208  (Not 230VAC Machine was Wired for)  and Control A.C. Voltage was only 101 Volts A.C.,  Way Too Low!   Transformer Did Not have Voltage Adjustment Taps to Fix Low Voltage.

Customers Reported that Machine Always had Odd Intermittent Control Problems.
We Changed the Step-Down Transformer in Control for a New Transformer with Proper Taps for their Voltage.  This gave us the Correct 120 Volts A.C. Control Voltage,  and Intermittent Control Problems All Went Away.

4 ---      Locate All Welding & Plasma Machines Far From CNC Machine!
  Especially Hi-Frequency TIG-Welders!

      They Make All Kinds of Electrical-Noise That Causes Intermittent Control Problems
      and Random Electronic Failures.    Keep Them Far From Your Strippit Machines!

      Installing a 8 foot Ground Rod on  EVERY  Welding Machine also sometimes helps.

5 --- Arcing CRT-Monitors Displays,  and Crashing the NO-Punch Zone Sensor can disrupt 12
      volts to Bubble Board,  and cause Problems.   We sometimes Modify Control Wiring and
      add a second 12 volt Power Supply for these Functions,  but this is tricky work to be
      done by a very Experienced Technician,  or you risk Damaging Control.

      We also sometime Add  "CRT Isolator Board"  Underneath the CRT-Cage to
      Isolate Arcing Electrical Interference from Control Cardcage.  
      More information on this can be seen on   "HECC80/30x Boards Types".

6 --- Do Not allow Too-Many Old Part-Programs to Accumulate in Memory!
      Delete Old Programs to keep Total to  40  or so,  and always Under  60!
      You can  Clear Them ALL Out  using       DELETE *.*

7--- Make sure Program-Names are Always in Capital-Letters,  or the Control will
     make Nonsense-Files out of them,  which are very Difficult to Remove.

8 --- Front Panel Controller Board is in Slot  #7,  and has Ribbon-Cables going to it's
      2 Connectors.    Inside Ribbon-Cable Rubs against Sharp Backside of Bubble Board
      in Slot #6,  and sometimes can Short-Circuit to it and Damage Both Boards!

      Take a Roll of Black Electrical Tape,  and Carefully Tape Around this Cable, 
      Starting at Inside-Connector and going Back about 4 Inches on Cable to protect
      it from Sharp Pins on Back of Bubble Board.       

10 -- Machine Technologies has Modifications that help Bubble Board Reliability.
       Send your Board-In,  and we can do these Changes in Only 1 to 2 days!

11 -- I sometime fit a In-Line Fuse-Holder with a  1.0 Amp.  Fast-Blow Fuse to Feed the
      12VDC  to  3LTB  and  4LTB  which Powers some Machine Switches.   This way,
      if you  "Crash"  a No-Punch Zone Sensor,  you will Blow the Fuse,  and Protect Both
      Power Supply and Bubble Board from Failures.   This work needs to be done
      by a Good Technician as there are wiring variations from Machine to Machine.

12 -- Sometimes  LH Power Supply will Completely Fail,  Control Shuts-Off,  and has 
       a  "Red-LED Fault Light ON"  on the Monitor Board. 
       Usually the 12 VDC section goes Bad,  but there are other Failure Modes.

       Other times,  the Supplies will just  "Drift"  and Not Stay at Set-Voltage.  
       This will also cause Intermittent Problems,  and  "Drifting"  Supplies Must Be
       Replaced!   New LH Supplies are No longer Available,  as the LH Company No
       longer Exists.   However,   We Do Keep Rebuilt LH Power Supplies In-Stock!

13 -- Always  "END"  a Part-Program when you are Done Running Program!
       Failure to Properly  "END"  Part-Programs can cause Programs to be Corrupted!

14 -- Remember,  the Bubble-Memory Board is Really a Disk-Drive.

       Always give the Bubble-Board a Few Seconds to Finish Ending,
       or whatever Job you have it doing,  before Shutting-Off Power to Control!

       If you   Shut-Off Control-Power,   or if  A.C. Power to Machine Fails when Bubble-Board is
       Still-Busy doing Some Activity,  Like  "End",  you may Corrupt both Your  Part Programs
       And Corrupt  the  System-Programs  that Run Control & Machine!

      If this Happens,  you will get Error Messages like   #DF42   or  "Bubble Read Errors"
      and you will  Have To Ship Bubble-Board to Machine Technologies for Repairs.

  The  LH Power Supply
1  --  Shut-Off the A.C. Power to Machine  and  Lock-Out the A.C. Power so it Can Not
        be Accidentally Turned-On while You are Working on Control & Machine!

2  --   This Step is Optional,  But will Improve Voltages to Bubble Board,  and there fore Boards
         Reliability.   This Step can Only be Done by a Good Technician that Knows What He's
         Doing,  or Much Control Damage Can Result From Wire Errors!

I Often see Intermittent Voltage Problems caused by Crimped-On Spade Connectors on the 4 Heavy-Gage Wires going from LH Power Supply to FTB2 and TB1 Terminal-Strips.  These Crimped Connections have a Varying-Resistance that Causes Intermittent Voltage-Drops which can Cause Bubble Board and other Control Problems.
To Fix,  Remove the following 4 Wires:
                                                   LH Supply 4 (or 5)   5 VDC-Return      to      FTB2-4
                                                   FTB2-4                      5 VDC-Return      to      TB1-3
                                                   LH Supply 6 (or 7)   5VDC                    to      FTB2-3
                                                   FTB2-3                      5VDC                    to      TB1-1

Cut-Off Plastic Coverings around the Spade-Terminals at Each Wire-End.  
Using a Hi-Wattage Solder Iron,  Solder Crimped Terminals at Each Wire-End. 
Then Flat-File and Sandpaper Each Terminal until they are Flat & Clean.    Reinstall Wires.
Double-Check Wire & Terminal Positions,  and that All Terminal Screws are Very Tight!

3  --  Pull-Up a Chair,  and Tighten  ALL Screws & Terminals in Both  Control  and  Servo
       Cabinets,  which Fixes a Lot of Intermittent Control & Servo Problems!
       Do This Before Making Any Power Supply Adjustments!!!

4  --  Use Only a High Quality Digital Voltmeter!  
        If it does not give Accurate Readings,  it may cause more Problems than you fix!
        I only use FLUKE  (Model 87)  Brand of Meters as they are the Best.

5  --  Use a Plastic Tuning Wand or a Insulated-Screwdriver to lessen chance of Shocks.

6  --  Use Test Leads with Micro-Clips on the Ends,  so you can Clip-On to
       Test-Points,  and have your Hands-Free to Safely make Adjustments.

7  --  Turn-On A.C. Power and Machine Control,  and let it Warm-Up for a few minutes.

8  --  These Voltage Adjustments are made with  Both  Meter-Leads on Test-Points
        ONLY  On The Bubble-Board Itself!    No Other Places!

9  --  Set your Meter for  D.C. Volts,  and Clip the Black-Lead on  GND. Test-Point.
        Above it should be the  5V Test-Point,  Clip your Red-Lead on it.

10 --  Most Controls have the  LH Power Supply.
        Early FC1000/3 Machines had Deltron Power Supplies,  But Deltrons were   
        Discontinued as they were Not as Rugged as LH Power Supplies.
        Most Deltron's were Removed in the Field,  and Replaced with LH Supplies.

        On the LH Power Supply,  using  V1-Pot.  (R26),
        Set the  5 Volt Supply to  5.080  to  5.100  Volts.

11  --  Move Red-Lead to the  12V Test-Point  to Set 12 Volts.   Some early Bubble Boards
         did Not have this Test Point,  so you may have to Clip-On to Bottom of Capacitor
         C30 or other convenient place on Bubble Board,  to Monitor 12 volts.

12 --  On the LH Power Supply,
         using  V3-Pot. (R41),  Set the 12 Volt Supply to  12.200  to  12.300 Volts.

13 --  Do Not Adjust any other Pots on the Power Supply!

14 --  Go back in 10 Minutes or so,  and Recheck these 2 Voltages to make sure that they have
        not  "Drifted",  and to be  Sure you Set Voltages Correctly!    This is Very Important!


CAUTION !!!

There is 120 Volt A.C. Voltage On and Near the Power Supply,
and Also Hi-Voltage 200 Volts D.C. Inside the Power Supply!  

Use Extreme Caution,  or You Can Shock,  Injure, or  Kill Yourself!  

As You will be Dead A Very Long Time,
Try Very Hard To Avoid This!  

Mistakes Could Also Damage Power Supply and Other Parts of Control!
Have an Experienced Electronics Technician Make the Adjustments!
The Strippit  HECC80/30x Controls use a Bubble Memory Board for Both System and
Part-Program Storage.    HECC80/30x Controls are Actually Primitive P.C. Computers Running under the Old  CP/M Disk Operating System,   and  Bubble Memory  
Board Acts as a  256K  (Not Meg!)  Solid-State Hard-Drive for this System.

These Boards are Very Voltage Sensitive When Actually Accessing Data from
Bubble Memory Modules.   It is Believed that Most Problems are Actually Caused by
Bad Power  (Surges,  Sages,  Spikes, and  Electrical-Noise in the A.C. Power to Machine)
or Improperly-Set Machine A.C. and Control D.C. Power Supply Voltages.

If these Voltages Fluctuate or are Not Set Correctly,  the Boards may Work Intermittently,  or Not at all,  causing Loss of Memory and Various  #DFxx  Bubble Memory Failure Errors.

Using CNC Control with Bad A.C. Power or Improperly Set 5 & 12 Volts Power Supplies can Even Damage Bubble Chips on Bubble Memory Board,  Requiring Expensive Replacement of Bubble Chips or Bubble Board.     Check  A.C  and  D.C. Voltages Regularly!

The Deltron Power Supply
Machine Technologies
Strippit Repair Parts  &  Strippit Service

Phone  704-233-5229

Other Items to Consider for
Bubble Board & Control Reliability;

1 ---  Most Used FC1000/3 Machines are Installed Incorrectly!

    On Both the Control & Servo Cabinets,
     ---   Each Cabinet is Jacked-Up Slightly using its 4 Leveling-Feet.
     ---   the 4 Bolts at Bottom of Machine Frame (under Each Cabinet) are Removed,
     ---   the 2 Bolts at Inside-Top of Each Cabinet are Removed
     ---   the 2 Bolts at Inside- Bottom of Each Cabinet are Removed
     ---   Bolts at Cross-Bar Between the 2 Cabinets  (under the back Sheetmetal Covers)
           of Machine are Removed,

     When this is done Correctly,  the 2 Electronics Cabinets are Isolated from the
     Shock &  Vibration of Punching because they  are  "Floating Free"  on Rubber
     Barry-Mounts Away from Machine Frame. 

     Failure to Install Correctly Machine & Cabinets will lead to Many Control
     Hard-Failures,  as well as Intermittent Control & Servo Failures.
Remember to Reinstall All Cabinet Bolts,
and Jack-Up Cabinet-Feet when Moving or Shipping Machine,
or
the Control & Servo Cabinets Can  (and  Will!)
Fall-Off of the Machine Frame!
NOTE !
When Replacing a Power Supply,  You have  No Idea How the Voltages are Set-Up!

So,  Before Turning-On Control,  I Pull Bubble Board Out of Slot #6,
and Test 5 and 12 Volt Supplies with Bubble Board Out of the Cardcage,
so it can Not be Damaged if Voltages are Wrong.

Clip-On your Voltmeter Leads to CRT Controller Board in Slot #8.
Test Point TP6 for Ground,  and TP5 for 5 Volts,  and Set Voltage as Listed Above.
Repeat with TP4 for 12 Volts to TP6 Ground.

When Voltages are Set Correctly,
Turn-Off Control,  Reinstall Bubble Board,  and
Reset the Voltages Again on the Bubble Board as Listed in Above Steps.
Note!   As New  L.H. Power Supplies are No Longer Available,
We Keep Rebuilt  L.H. Power Supplies In-Stock.

We also have Brand New Replacement Power Supplies In-Stock,
But these usually take a Service Call to Install.

And to  Improve Reliability,  we also Retrofit  2 more 12 Volt Power Supplies to Control.
This way,  CRT-Monitor has it's Own Supply,  Machine & Switches have their Own Supply,
and Bubble Memory Board gets It's 12 Volts from Main L.H. Power Supply
with No Interference from any CRT-Arcing or Machine Switch Crashes.
Strippit should Never had Bubble Board & CRT & Machine Switches on 1 Power Supply!
The Little  Bernini  Bronze  behind us is 10 Stories-Tall!

Be Sure to see it at  St. Peter's Basilica.