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!
Purchasing Dept. at Strippit bought some Transformers (To Save Money?) that
Did Not have 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 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.
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.