Magpowr DIGITRAC 2 Instruction Manual - page 13
)MAXIMUM TENSION TOO
HIGH
(
Selected maximum tension is
out of sensor range.
Calibration can be completed by using a
smaller maximum tension. See
)Maximum
tension is out of range
( below.
)SENSOR SIGNAL TOO
LOW
(
Maximum tension is out of
sensor range.
1. This problem is often caused by loading
the sensor in the wrong direction. It can be
corrected by reversing +SIG and -SIG
(TB2-1 and TB2-2).
2. If signal direction is correct, calibration
can often be completed by using a
larger maximum tension. See
)Maximum tension is out of range(
below.
Maximum tension is out of
sensor range.
When maximum tension is applied the load
on the sensors must be less than the total
sensor rating and greater than 1/8 of total
sensor rating. When two sensors are used
this is the combined rating of both (i.e.
100 lbs for two 50 lbs sensors). Calculate
this load from:
LOAD = 2*MAX*SIN(WRAP/2)
where:
MAX = maximum tension entered during
sensor calibration.
WRAP=wrap angle.
Tension oscillates
DIAGNOSTIC:
1. From the home screen use NEXT or
PRIOR to go to OUTPUT LEVEL.
2. While the machine is running record the
approximate output level.
3. Enter this value in the MANUAL LEVEL.
4. Switch to MANUAL mode.
5. If the tension continues to oscillate there
is an out of round roll or other machine
generated tension variation.
6. If oscillation stops the control may be
mistuned. See “ERROR LIM needs
adjustment.”
ERROR LIM needs
adjustment
1. Go to OPTIMIZE ERROR LIM.
2. Press and hold
é until the oscillation
stops.
If ERROR LIM is max go to
)COMP needs
adjustment
(.
COMP needs adjustment
1. Go to OPTIMIZE COMP (ignore reference
to core).
2. Press and hold
é until the oscillation
stops.
3. If oscillations cease, optimize ERROR
LIMIT.
3. If COMP is max go to
)STAB needs
adjustment
(.