4.3 Dynamic Tuning
Use
NEXT
or
PRIOR
to enter the DESIRED TENSION screen and enter the
desired value. Follow the flow chart, Figure 6, to enter CALIBRATE DYNAMICS.
When asked to OPTIMIZE in any of the following steps do the following:
1. Press and hold
ê
until the tension becomes
unstable.
2. Press and hold
é
until the tension is again stable. System stability can
be observed on the bar graph.
Run the machine at a moderate speed, with the control in AUTOMATIC
mode and perform dynamic calibration using the above procedure in the
indicated sequence.
STABility is normally optimized at full roll. COMPensation is normally
optimized at core. If the tension becomes unstable at some other roll
diameter see
)
Tension Oscillates
(
in Troubleshooting, Section 7.
5.
INSTALLATION OF MODEL PA-90 or PA-2 Power Amplifier (if used)
5.1
PA-90
Install the PA-90 before applying power to the control
Remove the D2 cover, or open the D2E door.
Set JP6 on the D2 p.c. board to “0-10V” and “voltage”.
Set JP1 on the power amplifier for the desired output current range.
On Model D2, unplug TB6 and remove the knockout from the rear of the enclosure.
Mount Power Amplifier per Figure 2 using the standoffs provided with the PA-90.
Resecure cover or door.
When using the PA-90, the DIGITRAC 2’s 0 to 10 vdc control output is still active but no longer isolated, and is
referenced to the AC line.
5.2
PA-2
Install the PA-2 before applying power to the control.
Remove the D2 cover, or open the D2E door.
Set JP6 on the main PCB to
)
0-10V
(
and
)
VOLTAGE
(
.
Set JP1 and JP2 on the power amplifier per Figure 2 for the desired output voltage and current range.
On model D2 unplug TB7 and remove the knock-out from the rear of the enclosure.
Mount Power Amplifier per Figure 2 using the standoffs provided with the PA-2.
When using the PA-2, the DIGITRAC 2’s 0 to 10 vdc control output is still active but no longer isolated, and is
referenced to the AC line.
5
