Cleveland Motion Controls WebPro Winder Tension ControllerMWP-12664 REV BA - Manual (Page 25)

AO-70171
24
Revision BA
WebPro Winder Tension Controller
Additional Information
The CCFL (cold cathode fluorescent light ) has an expected life of 20,000 hours.
The non-volatile memory is battery backed. The battery has an expected life of one year without a
recharge. The battery will recharge when the Controller is powered.
External tension set point input
This is an analog signal of 0 to +10V DC, for Master - Slave applications. The input resistance is 100K S.
The EXT SET POINT must be enabled in Machine Parameters to use this feature.
Tension set point output
This is an analog signal of 0 to +10V DC at 2mA maximum, for Master - Slave applications.
Adjusting the screen contrast
There are two unmarked keys, one below the CONFIRM key the other below the TENSION OFF key.
Press both together and release, the KEY LED will flicker. Whilst flickering press one or the other
unmarked key as required to adjust the screen contrast, release and allow the flickering to terminate.
Diameter calculation
In Speed and Torque modes, when the line speed is above 6% the Controller continuously calculates the
reel diameter by dividing the line speed signal by the reel speed signal, below 6% of line speed the
diameter is held in memory and the calculator is disabled to prevent spurious operation. The Clutch
Winder self calculates the reel diameter without the need of line speed and reel speed signals. To avoid
interaction with the control function the diameter calculator has a time constant of approximately 60
seconds from full reel diameter to core diameter. The diameter reset function has an instantaneous
action.
Troubleshooting
With the exception of the fuses, F1 - 160mA and F2 - 1A, there are no user replaceable or serviceable
parts in the Controller. If a fuse is ruptured the cause should be investigated before replacement.
1. If the POWER LED is lit, the incoming supply and fuses F1 rated at 160mA and F2 rated at 1A are
correct. If the screen is blank or the backlight is not functioning the Controller must be returned to CMC
Inc.
2. Check that the transducers are wired correctly and that the excitation voltage between TB2 (1 and 4),
and between TB3 (2 and 5) is correct for the type of transducers used. Reset link LK1 if required.
3. Check that the Machine Sequencing switching is wired correctly and enabled from the Machine
Parameters screen.
4. Check that the Output Level Limit is not set to zero, 0%.
5. In Speed, Torque and Surface Winder modes, it should be possible to maintain the web tension better
than +/-5% at all times. If not, investigate the motors and drives to confirm that they are of a type suitable
for tension control with an adequate, linear torque rating and this torque is constant as it rotates, that all
shafts and rollers are concentric and rotate freely and the web speed is constant.
6. In Speed mode, with the tension OFF, the winder speed voltage as determined by the diameter
calculator and the line speed only will be output from the Control Out terminal TB4/5. This should
correspond closely to +10V at minimum diameter and maximum speed if the Output Level Limit is 100%.
7. In Torque mode, with the tension OFF, the winder torque voltage as determined by the diameter
calculator and the tension set point will be output from the Control Out terminal TB4/5. This should
correspond closely to +10V at maximum diameter and maximum tension if the Output Level Limit is
100%.
8. In Clutch Winder mode can the output to the E/P converter or High Current Driver be adjusted by the
Output level Bias. If so check the air supply and E/P or the electrical supply and the High Current Driver.