Adjusting Encoder Voltage - Epson RC420 Manual

Maintenance 7. DPB (Drive Power Board)
Connector No.
X306, X307

7.2 Adjusting Encoder Voltage

You may adjust the Encoder Power Supply voltage using a control, VR1 as follows:
(1) Turn ON the Controller to boot the controller software while pressing the Emergency
(2) Measure the voltage between the encoder +5V and the GND pin on the Encoder
(3) The VR1 control used to adjust the Encoder voltage can be accessed from the rear
(4) If the measured voltage is lower than 4.9 V, turn VR1 in the "+" direction by 1/2 turn
(5) Repeat step (2) to ensure that the voltage is between 4.9 V and 5.2 V.
(6) If necessary, repeat steps (4) and (5) until the voltage is within the range of 4.9 V to
130
The connector to output the AC200V to the Switching Power
Supply.
X308 The connector to output to the discharging resistor.
X309 The connector for the SSR (Solid State Relay) Control Signal.
The connector to input the +5 V and +12 V from the Switching
X310
Power Supply module.
The connector to input the +24V from the Switching Power Supply
X311
module.
X315 The connector to input the +5 V and +12 V to the HDD and FDD.
Stop switch. Make sure that the encoder power is being supplied by checking LED1
on the Manipulator's relay board. (The LED must be ON.)
Signal connector of the longest motor cable in the Manipulator. (As for which pins
to use, refer to the Manipulator manual.)
If the encoder voltage is not within the range of 4.9 V to 5.2 V, adjust it as follows:
panel of the Controller, as shown below.
to increase the voltage. If the measured voltage is higher than 5.2V, turn VR1 in the
"-" direction by 1/2 turn to lower the voltage.
5.2 V.
Function
VR1
RC420 Rev.9