The 1391 Series Allen Bradley drives are still in use on many machines throughout industries, especially automotive, aerospace, food production, wood products and conveyor-type systems. A stout servo drive system, the 1391 comes in both analog and digital. Here, we will look at the analog side, but it’s meanings are the same in digital.
Today, we have an Indramat HVR02.2-W010N power supply in for repair. After a static check, we connect power to the unit to confirm the fault. It is then disassembled; and taken to our wash-down area for a full cleaning and bake, before we begin the repair. This unit came from a parts manufacturer in Detroit and experienced a voltage spike which burned up incoming line voltage.