Calibration
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E-651 / E-614 Controller / Amplifier PZ129E Release 6.1.0 Page 15
channel accessible through the front panel, p. 8; E-614: R132
for channel 1, R133 for channel 2). This potentiometer shifts the
output of the sensor processing circuitry and hence the values
on the sensor monitor output (E-651: front panel; E-614: MON-
DMS1 and MON-DMS2 test points) and sensor-input lines of
the servo-loop submodule.
For the operating elements of the E-651 benchtop devices see
p. 8.
For the location of the potentiometers, connectors, switches
and jumpers of the E-614 OEM board see the E614T0003
technical note.
To adjust the zero-point for a channel proceed as follows:
1
Before powering up the system, make sure the actuator
is mounted in the same way and with the same load as
during normal operations in the application. In multi-
axis systems, make sure the actuators are always
connected to the same controller channels.
2
Make sure the analog control input (E-651: front panel;
E-614: connector X20) is at 0 V.
3
Set the channel to open-loop mode (E-651: SERVO
OFF; E-614: EC/VC switch to VC)
4
E-614 only: close jumper X7 (channel 2) and X10
(channel 1) to disable any DC offset potentiometer.
5
Power up the system.
6
Deflect the actuator over its full range by sweeping the
control input signal over the range of -5 V to +5 V.
7
Hold the control input signal at -5 V.
8
Adjust the ZERO potentiometer so that the sensor-
monitor signal is 0 V.
Normally the zero-point adjustment can be finished at this point.
Now you can switch the channel to closed-loop mode and
deflect the actuator over the full range by applying a control
input voltage of -5 to +5 V. The overflow LED should not light
up. If the overflow LED does light, repeat steps 2 to 8.
Failure of the zero-point re-adjustment (i.e. overflow LED still
lights up) could indicate a serious problem. See "Calibration" for
information on how to proceed.