Ransburg, Operating procedures – Ransburg Evolver MicroPak Controller A10406 User Manual

Page 23

current setpoint is adjusted by potentiometer R21

if dipswitch SW3-1 is OFF, or by the remote 0 to

10VDC over-current setpoint input if dipswitch

SW3-1 is ON.

Feedback Fault Indicator

Glows yellow whenever a feedback fault occurs.

The feedback fault monitors the HV and current

feedback signals from the cascade for abnormal

signal levels. A feedback fault indicates a possible

open circuit between the controller and the cascade

located in the Evolver applicator. Check the low

voltage cable and its’ connections for the cause.

When high voltage is on, a feedback fault may

also indicate a defective cascade. If the Feedback

Fault Indicator comes on and flashes, this indicates

a board malfunction. In this case, the MicroPak

Control Unit should be removed from service and

sent back to Ransburg for repair.

Local/Remote Switch

Determines whether the MicroPak Control Unit is

in local or remote mode. In local mode the kV and

over-current setpoints come from the front panel

kV and μA Adjust Knobs, respectively. In remote

mode, the kV setpoint comes from the remote

analog 0-10VDC kV input and the current setpoint

comes from either R21 at the top of the MicroPak

process Board (see Figure 6A) or from the remote

analog 0-10VDC Over-Current Setpoint input,

depending on the setting of dipswitch SW3-1.

Microamp Meter Display

Displays current in millionths of amps (microamps)

being drawn from the applicator electrode.

OPERATING

PROCEDURES

(See Figures 2 & 8 for Operating

Controls)

Typical Local Mode

1. Ensure the AC power, safety ground, low voltage

cable, and interlock connections are made as de-

scribed in the “Installation” section of this manual.

2. Turn the high voltage adjustment knob fully

counter-clockwise.

3. Turn the AC Power ON/OFF switch (see Figure

2) to the ON position. When the AC power is on the

green CPU Indicator on the front of the Discrete

I/O module will illuminate.

4. Turn the MicroPak ON/OFF switch to the ON

position. The kV and μA displays will come on

along with the yellow MicroPak Power Indicator

located above the switch.

5. Momentarily push the High Voltage Enable

Switch to the ON position. Assuming dipswitch

SW3-3 is off, the red High Voltage On Indicator

should turn on.

6. Using the kV Adjust Knob set the kV output to

the desired value as displayed on the kV Meter.

Ensure the over-current setpoint is set above

the maximum expected current, or an overload

fault will occur. The over-current setpoint can be

adjusted by turning the μA Adjust Knob with the

View/Change Setpoint Switch held in.

7. To turn high voltage off, momentarily move the

High Voltage Enable Switch to the OFF position.

8. When finished spraying, turn the AC Power ON/

OFF Switch (see Figure 2) to the OFF position to

prolong the life of the internal fan.

Typical Remote Mode

1. Ensure the AC power, safety ground, low

voltage cable, I/O, and interlock connections are

made as described in the “Installation” section of

this manual.

2. Set the 0-10VDC kV setpoint input to its mini-

mum value (0 volts).