Servo Control Boards
PWMC7 Board Controls 2 Power Modules on the
Smaller X or T-Axis Servo Drive on Strippit Machines.
PWMC8 Board Controls 4 Power Modules on the Larger High-Current Y-Axis Servo Drive on Strippits.
Very Early 3 Drives (Built about 1980 to 1982) had PWMC5 and PWMC6 Control Boards. These Early Boards were So Unreliable that General Electric Redesigned PWMC5 Board into New PWMC7 Board, and PWMC6 Board was Redesigned into New PWMC8 Board.
At Strippit, We Updated ALL Early Model 3 Drives to
PWMC7 & PWMC8 Type Boards in the Field back in 1983 almost 40 years ago, and All Model 3A-Drives came from
Strippit Factory with the New Type Boards.
Other Brands of Machine Tools that used these Old PWMC5 & PWMC6 Boards should have them Replaced
with New PWMC7 and PWMC8 Boards!!!
If you have any Old PWMC5 & PWMC6 Type Boards
laying around, Do NOT Use Them!!! They are
Unreliable and likely to Blow-Out the Power Modules!!!
Replace them with New PWMC7 & PWMC8 Boards!!!
There are 2 Fault LED lights on these Boards that are Normally-Off. An LED "ON" means a "Over-Current" Fault, usually caused by, a Bad Servo Control Board, Bad Power Module, Bad Servo Motor, or Bad
(Short-Circuit) in Wiring to Motor.
There are also "False LED-Trips" sometimes on some Machines caused by Electrical-Noise from Poor Internal Machine Wiring-Layout, Bad Suppressors, or Arcing in the Machine somewhere.
These "False Trips" Can be Very Difficult to find.
Note!!! Note!!! Note!!!
There are Components on these Boards that Wear-Out in Old Age, and can cause Very Expensive Servo Failures!
Send-In your PWMC7 & PWMC8 Boards to be Updated,
and Save yourself a Lot of Expensive Grief!
We can Do these Board Updates in only 2 Days!