Strippit Houdaille  HECC80/3  Control
Circuit Board  Types  &  Usage
This is a Listing of
Types & Usage
of the
Electronic Circuit Boards in
Strippit Houdaille HECC80/3
Type CNC Controls.

HECC80/3 CNC Controls
were Used on Strippit
Turret Punch Press
Laser Machines
Built in the 1981 to 1987 Period.

The HECC80/3 Type Controls
Look like the Picture to the Right.

If your Control Does Not look
like this Control,  Go to Our
"HECC80 Control Types"
Web-Page to Properly Identify
Your CNC Control!
Note #1.   Strippit Houdaille Circuit Boards have 2 Numbers on them. 
The  "Odd"  Number is for a Raw-Blank Board with No Parts Installed on it,  
and is of No Interest to You or Us.

The  "Even"  Number is for a  Finished Assembly Circuit Board.
Example,  the  "Odd"  Number  #400965-xxx  is for a Blank CPU Board.    We are Only Interested in the  "Even"  #400966-xxx  Finished Assembly Circuit Board Number!

Note #2.   Strippit made Many Different Versions of some of these Boards that are Very Similar,  But are Not the Same!   Pay Close Attention to the Board (-xxx) Dash Numbers!

Note #3.   Some HECC80/1 Boards and HECC80/3 Boards look Similar,  
But  are NOT Interchangeable!    If you have more than 1 HECC80 Control Machine,  
Make sure the Boards do Not Get Interchanged!
48K Ram Memory Board

#401520-003   48K Ram Memory Board
To Improve Reliability and Reduce Costs, 48K Ram Board was made to Replace  3 -- 16K Memory Boards previously used.

Boards were used on Later HECC80/30x Controls and were sometimes Retrofitted to Earlier Controls which Required some
Cardcage Rewiring.

1 Board was used in Control Slot #3.
Slots #4 and #4 were Now Left Empty.

Note,  This is 1 of Pram Board Family.
Raw (No-Parts)  #401520-xxx Pram
Boards were used to make a Whole Family of Prom & Ram Boards,
Hence the Name "Pram Board".
16 K Ram Memory Boards

#400480-600   16K Ram
#400480-700   16K Ram
#400480-701   16K Ram 
#400480-702   16K Ram

Early Bubble-Memory Controls
(HECC80/302,  304,  306,  &  BC)  used  3
16K  Ram Memory Boards in  Slots
#3, #4, and  #5  to give a Total of
48K of Ram Memory for Temporary
Part Program Storage.

3 Boards were usually of 1 of  4 Types listed above, but some Controls have a
Mix of Various Types.   Some Types were
"Improved" Versions for Increased Reliability, and some Types were Just Made to use-up old Stock Boards in Inventory.  Its Best to Replace a Bad
Board with Same-Type.
CRT-Graphics Board

#401384-000  Graphics Board

This was a Hand-Made Wire-Wrapped Board
(Not a Conventional Eched-Copper PC Board)
because of the Low Production Volume,
that was Only Used in
HECC80/BC (Blanking Center) Controls
in  Slot #9 
that Worked in Conjunction with
CRT-Controller Board in Slot #8.

I think there is only 1 or 2 Blanking Centers Still Running in the World,  so Information & Availability of this Board is Quite Limited.

Bubble Memory Board

#40135-000  Standard Bubble Memory Board.
Some Boards were Marked with other Dash  (-xxx) Numbers representing Different Software Versions Loaded into them, but Old Dash-Number Type System is No Longer used on Bubble Boards.  Use Standard Board & Load Proper Software for Your Machine.

HECC80/30x Controls actually Run under an Old Disk Operating System that Strippit Houdaille Licensed or Stole called  CP/M.   Strippit Houdaille Renamed  CP/M   "HOS"
for Houdaille Operating System.   CP/M is comparable to old MS-DOS Disk Operating System.  IBM almost went with CP/M  instead of MS-DOS for their P.C. Computers back in 1980.   Had they Done So,  Bill Gates would be $150 Billion Poorer Today!
In HECC80/30x Control System,  Bubble Board is used as a Solid State Disk Drive.   Bubble Memory is Non-Volatile,  Meaning once a Program is Stored on it,
it requires No Electric Power to Keep Programs Stored Indefinitely.
Board has  2 --  128K Bubble Modules on it,  128K for Your Part Program Storage,  and 128K for System Programs that Run Control & Machine.   Board goes in Slot #6.

Boards are Quite Voltage Sensitive.   Improper D.C. Voltages or Electrical Noise can cause Board to Dump it's Memory and Control will Start-Up with Various  #DFxx Errors.
We can usually Repair these Boards,  and  Add Modifications to Improve Reliability.
There is More Bubble-Board Problem & Repair Information on Our
Web-Page    "Bubble-Board Problems & Fixes".
Front Panel Controller

#400476-100  Front Panel Controller 
         Board,  Slot #7

This is Board that  "Talks"  to All Control Panel Buttons & Switches, Keyboard & Soft-Key Keyboard, and  Tapereader.

If You are using a  M81 Post Punch Delay Programming Code,  Control Looks at Switch Position on this Board to Determine if You want a  100 MSec. Delay  (Switch Down)  or a  250 MSec. Delay  (Switch Up).

When Replacing Board, be Very Careful You Insert 2 Ribbon Cables in Correct Slot!
And Do Not Insert Cables Up-Side Down!   On Multi-Color Ribbon Cables that were Usually Used,  "Brown Wire"
Always Goes UP!
CRT Controller

#401124-000  CRT Controller Board,
                Cardcage Slot #8  

This is Board that Generates
TTL-Vidio Signals  & 
Supplies 12VDC Power
that goes through CRT-Cable
to  CRT-Monitor Display
Mounted on CNC Control Door.

2-Port Memory
You have to Understand how HECC80/30x Controls Work.  They all have
2 Computers Inside Splitting the Work.

L2  CPU  Runs  "Front-End" of Control,  like Control Panel Switches,  CRT,  Keyboard,
Tapereader,  Part-Program Storage,  Etc.

L10  CPU  Runs  "Back-End" 
for the  3-Axis Positioning Systems
and  Machine Switches & Solenoids.

2-Port Memory Board is "Interface" Between these 2 Computers.  Each CPU Board puts Data in this Board that it Wishes to Pass to Other CPU Board.  Needless to say, a Intermittent Bad 2-Port Board can cause Limitless Odd Problems.
CRT Monitor Display

CRT Monitor Display that is Mounted on Control Door to Provide
"Man to Machine Interface".   Displays  Program-Data,  Axis Positions,  Error Messages,  etc.

Strippit used Many Different
Part Numbers for these Monitor Assemblies over the Years.

And there were 2 Different Yellow
Metal Cases  used,  which,
Of-Course,  are Incompatible.
CRT Isolator Boards

All CRT Monitors  "Snap & Pop" as the Hi-Voltage (13,000 Volts!)  Intermittently Arcs Inside Assembly.

It was thought that this Arcing was Back-Feeding through CRT-Cable to
Control Cardcage and Causing some Bubble Memory Board Failures.
Isolator Boards attempt to Isolate
CRT-Assembly from CNC Control to Stop "Sparks" from Disrupting Control.

CRT Isolator Boards were used on Late Model HECC80/30x Controls, and were sometimes added to Early Controls, in the Field, to try to Improve Reliability.

Board  "Hangs"  Underneath Yellow-Metal CRT-Assembly, and has a Ribbon Cable that goes to L8 CRT
Controller Board,  a Signal Cable that Loops up to CRT-Assembly,  and a 2 Wire Power Cable that goes Directly to 12VDC Supply & Ground.
There are at least 3 Types;

#401674-000  Original Type,   
used Isolation Transformers.

#401674-200  2nd-Type, used Opto Isolators Chips for Better Performance.

#401674-100  2-Pot Design for use with
2-CRT Boards on HECC80/BC Control.

#  22069-000  CRT-Exchanged
#402844-000  CRT Assembly,  Old-Style with   "Smooth-Bezel that Sticks-Out"
#402844-000  CRT Assembly,  New-Style with  "Textured-Bezel that is Recessed"
#402848-000  CRT-1 Retrofit Kit,   "Smooth-Bezel that Sticks-Out"
#402848-100  CRT-2 Retrofit Kit,   "Textured-Bezel that is Recessed"

As Everyone Now Uses Color LCD Flat-Screen Monitors,  these 12 Inch Monochrome TTL-Input Monitors are No longer in Production and there is No New Monitors.
They have a Fairly High Failure Rate from Cheap-Oriental Designs (several different Brands have been used) and Shock & Vibration from Control being Mounted on  FC1000/3 Machines,  So this can be a Problem.

However,  We Can Often Repair or Replace a Bad CRT Monitor.
We Require that you  Send-In All the Following Items,  as it is a System.
1  --  CRT-Monitor  Assembly
2  --  CRT-Cable
3  --  CRT-Controller Circuit Board,  Slot #8
4  --  CRT-Isolator Board if 1 was used on your System,  it Hangs-Below CRT-Cage.

We, and Strippit, have also made a Type of Replacement from Old P.C. Monitors.
These have  A.C. Power Cord that Plugs-In to Power Strip  or Wired-In to A.C. Power.
These Monitors do Not use CRT-Isolator Board,  and  do Not use 12 VDC Power.
In the Fine Strippit Tradition of Making Everything Overly Complicated, 
There are 4 Types of 2-Ports Boards using 3 Part Numbers.

#401210-000   2-Port Memory Board,  with No Math Chip,  Made for HECC80/BC  (Blanking Centers)  which do Not use Math Chip.   Board will work in other
HECC80/30x Controls if you do Not use the "Fab 5" Function.

#401210-100   2-Port Memory Board.   
Early Board made Only for Special Caterpillar HECC80/2 Controls,  which I think does
not Exist anymore.    I don't Know what Differences are on this Board.

#401210-200   2-Port Memory Board.   Standard Board for all HECC80/30x Controls.  
Has Math Chip.   Math Chip is Only used for running  "Fab5"  Function.
Late Versions of this Board were  "Multi-Layer"  (4-Layer) Type that appear Black.
Multi-Layer Boards were Built to try to Increase Control Reliability.

Note.  The  "Fab5"  Function is a Carryover Programming Program from Olden Days Before Modern CAD/CAM Programs.   It Allows a Small Information Macro Program such as a Grid-Program as small as 1 Line,  to be  "Fab5'ed".    Fab5 will then Build a Expanded NC-Run Version from Macro-Information File in Control Memory that now has Hundreds or even Thousands of Lines of Code to Punch a Grid or a Big Perf Job.

Unfortunately,  Fab5 Function is Not Supported by Any Aftermarket Programming Software as it is Not Needed anymore,  and so is Very Rarely used today.
#400478-xxx Prom Board

Everyone Calls them Prom Boards,  But are Really Eprom Boards,  as Strippit used only Eproms Chips which are 
Erasable Programmable Read Only Memory.
Proms & Eproms are Memory I.C. Chips where you can Program-In & Store your Data, and it stays in Chips More or Less Permanently,
even when Power to Board is Turned Off.

Typically, Prom Boards Store Executive-Run Programs that Run  Control & Machine. 

HECC80/3  Non-Bubble Board Controls on Early FC1000/3 Machines had a  #400478-900  Control Prom Board in Slot #3 for  L3 "Front-End" CPU.
L10  "Back-End"  CPU used  #400478-901 Machine Prom Board in Slot #11.

Later  HECC80/302,  /304,  /306, and  /BC
Controls all get their  "Front-End"  Instructions from Programs Stored in L6 Bubble Board.
"Back-End"  L10 CPU used Data from
#400478-905  Machine Prom Board in Slot #11.

Some Early HECC80/302A Controls used a 
#400478-915  Prom Board using 16 Eproms.

#400478-xxx  Boards in HECC80/30x Controls
used 2716 Type Eproms.  There are Many
Different Machine & Control Software Versions Stored in these Boards,
and Replacing a Bad Board can be Tricky!

#400520-xxx  Prom Boards

Later HECC80/30x Controls used another Version of the  "Pram"  Board Family.
These Eprom Boards used only  2 --  27128 Type Eprom Chips in Slot #11 for
"Back-End"  L10  CPU.

#401520-007  HECC80/304 for FC1500/45
#401520-017  HECC80/304 for FC1500/45 3-chip
#401520-107  HECC80/302 for FC1000/3
#401520-117  Some HECC80/302A on FC1000/3
#401520-207  HECC80/BC for Blanking Center
#401520-307  HECC80/306 for FC1250/30/1500
#401520-317  HECC80/306 for FC1250/30/1500,
                        3-Eprom Chip for Level 2 
                     Software & -100 Bubble Res-Prom 

Note,  There is a Cornucopia of Different Eproms for these Boards depending on Options --  Loader & Unloader,  Plasma,  Laser & Type of Laser Used,  Etc.   It can be Difficult to Replace Boards because of Many Different Software Revisions & Option Types.

32K Ram Memory Board

#401520-001  32K Ram Memory Board 
was First Board of the Family of  
"Pram"  (Prom and Ram)  Boards.

This was a 32K Memory Board that was Only Used in Original HECC80/3  
(No Bubble Memory)  Controls on
First 30 or so  FC1000/3 Punch Machines.
2 Boards were used,  in Slots #4 & #5.

Memory Boards were Power Backed-Up with a Ni-Cad Battery Pack so that they would Retain your NC Part Programs that had been Loaded into this Memory even when Control was Turned-Off.

Most of these early  FC1000/3  HECC80/3 Controls were Retrofitted in the Field to HECC80/302 Bubble Board Status.
Cardcage was Rewired,  Memory was Replaced with 3 - 16K  or  1 - 48K Memory
Boards and a Bubble Board was Added.
CPU Board
#400966-100  CPU Computer Board.

2 of these CPU Boards were used in All
of the HECC80/30x Controls,
1 in Slot #2,  and 1 in Slot #10.

All Boards were Set-Up for RS-232 Input.

Most CPU Boards were the Standard
2-Layer Type,  But some Later Boards were the 4-Layer Type  (2 Signal Planes, a Power-Plane, and a Ground-Plane)  and Boards appeared Black, because Light would Not go through these Boards.   4-Layer Boards are Considered More Reliable than 2 Layer Type.

CPU's are the 
"Computer Brain"  of CNC Control,
if they are Not Working,  Nothing will Work!
In Normal Operation,  there will be
2 Green-LED Lights "On",  and the
3 Red-LED Lights will be Very-Dim or  "Off".
This page was last updated: February 4, 2023
General Propose I/O Boards

G.P. I/O (Input/Output) Boards are how  L10 CPU Machine Computer Receives Signals from Machine Switches and Issues Commands Out to Solenoid-Drivers to  Machine.

#400790-200  Slot #12  in  HECC80/302  & 306
                       Slot #14  in  HECC/BC Controls

#400790-201  Slot #13  in  HECC80/302 &  306
                       Slot #15  in  HECC80/BC Controls

#400790-204  Slot #12  in  HECC80/304

#400790-400  Slot #13  in  HECC80/304  for 
                        Thermal Dynamics Plasma?

#400790-500  Slot #13  in  HECC80/304  for
                        Hypertherm Plasma?

I/O Isolator Boards

These Boards Provide Opto-Isolator
I.C. Chip Isolation between Control & Machine to Help Prevent Problems like Electrical Noise and Ground-Loops.

There are 2 Main Types;

Input Isolators which Connect to  Machines Switches & Sensors.

Output Isolators which Drive
Machine Solenoid Valves.

#400788-300   24-Output Isolator Board with 21 Transistor Solenoid Drivers
and 3 Opto-Isolator Outputs  Used to  Remove 3 Servo Drive Inhibits.

#400788-400   24-Input Isolator Board.

#400788-500   ???

#400788-600   24-Output Isolator Board with 24 Transistor Solenoid Drivers and has 2 Diode Back-EMF Suppressor Diodes on Each Driver Output.
Used on  "Cell-Systems" ???

Different Types of  Boards had Different Numbers of Eproms.

L11 Machine Prom Boards Usually had 11 or 12 Eprom Chips.
Board Pictured Above is 1 Example of this Type of Eprom Board.
Note #1,   Early Boards were Very Sensitive to Humidity,  Inputs & Output could be "Fired"  by Even Breathing on them!   Later Boards had Extra Resistors Added to
Opto Chips to Decrease this Sensitivity.   Often is Best to Replace Early Boards!

Note #2,   Early Boards had Screw-Terminal Strips on Board's Wire Inputs.
So it was a Pain In The Ass to Swap Boards for Quick-Testing as Each Wire had to be Individually Removed & Reinstalled on New Board.  Later Boards had
Quick-Disconnect Wire-Connectors so Board could be Simply Unplugged.
Be Aware of this when Ordering a Replacement Board,  Later Boards are Best!
Position Comparator Board

Board Compares Control's
Axis Position-Command  and
Actual Axis-Position,  
to Generates a Error-Signal for
Phase Analog Board & Servo Drives to 
Use to Move to Commanded Position.

#400474-100   Axis Control Board,
this 1 Type was used in 
All  HECC80/30x Controls.

Used in Following Cardcage Slots;
X -- Axis Board in Slot #  19
Y -- Axis Board in Slot #  20
T -- Axis Board in Slot #  21

Note!  Switch is Only used in a Certain
Test Procedure that You will Never Use.
In Normal Operation,
It Does Not Matter if Switch is Up or Down,  
But  I Normally have All  3  "Down".
Axis Control Board

#400470-100  Axis Control Board

Only this 1 Type was used in All 
the HECC90/30x Controls.

Used in Following Cardcage Slots;
X -- Axis Board in Slot #  16
Y -- Axis Board in Slot #  17
T -- Axis Board in Slot #  18

Axis Control Boards 
contain the Logic that Initiate and Control Axis Moves.

Phase Analog Board

Phase Analog Board Converts 
Position Comparator Board's 
Error-Pulses into a  
D.C. Analog Voltage for
Axis Servo-Motor Drives to use.

As there are Many
Differences & Variations in Components & Machine Axis, 
there are 3 Pots (Potentiometers)
to  Adjust  &  "Tune" 
each  Axis for Proper 
Positioning Characteristics.

#400482-400  Phase Analog Board 
is used in all HECC80/30x Controls 
in  Slot #22
Resolver Excitation Board

Resolver Excitation Board 
Generates  Sine & Cosine Signals 
that are used 
to Excite the Resolvers in
Position Feedback Packages 
on  End of Each 
(X, Y, T)  Axis Servo Motor.

 #401272-000   Resolver Excitation Board,                    3MHZ Sine-Wave Type.  

 This Board was used on all 
HECC80/30x Controls in Slot # 23.

Monitor Boards

There were 3 Different Type of Monitor Boards used in the HECC80/30x Controls.

#401194-000   Used Only on Early FC1000/3 Machine's HECC80/3 (Non-Bubble) Controls.

#401194-100   Used on All Early HECC80/30x Bubble-Memory Type Controls.

#401194-240   Used on Late HECC80/30x Bubble-Memory Type Controls.

The 3 Board Type are Not Interchangeable.

Board was Mounted on Power Panel on  Side or Back of Control Cabinet.

Monitor Board has 2 Main Functions;

1 --  If 3-Phase A.C. Power to Machine is On,
then this Board is Powered-Up with it's Green LED Light ON,  and is Ready to 
Turn-On  Control when you
Push  System-On Button.

2  --   When Controls is Turned-On,  
Monitor Board  "Monitors"  
Control's  D.C. Voltages.   
If any are Too High or Too Low,
Board will Turn-Off Control to Protect itself.

Softkey Keyboard

#401390-000  Softkey Keyboard
8-Key Keyboard Mounted
Directly Below CRT Monitor.

Each  Key is  "Labeled"  on CRT Display above,  and  Key's Name  & Function Changes depending on Control Mode at that Time.
Indicator Bank Board

#401620-000   Indicator Bank Board 
is a Group of  "Idiot Lights"  
that the Control,  
through  G.P. I/O Boards, 
Tries to Tell you Something like  "Load Position",  "Axis Limit",
"Servo Overtemp",  Etc.

Board is Mounted on Back of Control Door, and Shines through
Control Front Template.

Board uses Soldered-In  #CM7362  
5 Volt D.C.  Light-Bulbs, 
that are Usually Burned-Out, 
and are a Pain to Replace.
Continuous Contour Board

#400888-100  Continuous Contour Board 
Is a Dedicated Computer that Calculates Small X & Y Moves Continuously to
Allow Laser and Plasma Machines 
to Make Smooth X & Y Axis Movement 
for Cutting Purposes.

Board is Used in Slot # 14.
At Left is Original  #22359-000
Microswitch Keyboard that was Custom-Made for  Strippit Houdaille HECC80/30x Controls.

Keyboards are Not Usually Repairable,  and are No Longer Manufactured.    As Controls are Unusable without a Good Keyboad,
this is a Problem.
Power Supply

Below is Deltron Power Supply that was used on Early HECC80/30x Controls.   They had some Reliability Problems as they were often
Shook-Apart by FC1000/3 Vibration.  

They were Replaced with More Rugged  L.H. Type Power Supply show at  Left.  These Power Supplies were Further Ruggedized by Strippit by Adding
Wire-Ties & RTV-Silicon to Components that could Move & Break.

We Stock these  #401491-000  Power Supplies.
More Information on  Power Supplies and their Voltages Settings,  go to Our  Web-Page
 "Bubble Board Voltage Adjustments and Fixes".
Extender Board

#400322-000  Extender Board

Used by Service Technicians to Extent-Out of the Cardcage 
a Circuit Board so that it can be Probed & Tested 
with Volt Meters & Oscilloscopes.

Every HECC80 Control Build 
Shipped from the Strippit Factory 
with 1 of these Extender Boards
in it's Cardcage.

Transition Boards

#400880-xxx  Transition Boards were made in Many Different Versions for the Various
HECC80 Control Versions.

Boards were used to "Transition"  between 
Hard-Wiring From Panel Switches, Tapereaders,  Etc.  to Ribbon Cables to take Signals
to Control Boards.

At Back of this Board is Black
"Thumb-Wheel" Rotary Switch that is Used to Set RS-232 Baud Rates,  That Many Customers Can't Seem to Find.

Every HECC80 Control has One. We Set Thumb-Wheel to  "A"
for 2400 Baud which Works Well on HECC80/30x Controls.
Top Softkey Keyboard is Later  "B"  Type.    Lower Keyboard is Earlier  "A" Type.
Difference is Slight Difference in Mounting to the Control Door, 
But  are pretty much Interchangeable.
More Information is on my   "Special HECC80 Parts"   Web-Page,  Look there!
New Softkey Keyboards are Available  or   We Can Repair Yours in Only 1 to 2 Days.
To Fix this Keyboard Problem,  
We have Engineered a New Replacement Keyboard.

New Machine Technologies Keyboard Covers the Old Keyboard Panel Hole,  Plugs Right into Cable, and can be Installed in Minutes.
More Information is on our 
"Special HECC80 Parts"  Web-Page.
We have some  CRT Monitor Displays   and   LCD-Flat Screen Displays
In-Stock!    Call if you need a New Display for your Control!