Rockwell Automation 1395 Reel Tension Paster Adapter - Manual (Page 39)

Publication 1395-RTP-5.1 - September 1997
Start-Up Instructions 3-19
Final Speed Match:
The dancer should now be free to move and ready for contact with the
web, and the dancer position system has been enabled.
Important: A full diameter roll of paper should be used for this
procedure.
1. The preset #1 speed of +20 RPM is the default, assuming that the
press speed during auto slack is less than this value. If not enough
slack is inserted during Mode 7 fast enough, adjust Parameter 633
to a greater value.
2. The Max Press Ref RPM, Parameter 562 will again be used to
make the final speed matching adjustment for maximum speed
tracking for the Drive when following the press line speed
reference signal. This adjustment must be made with the integral
gain of the P/I Regulator (P.567) set to zero so as not to try to
compensate for tracking error. As the press speed is gradually
increased, the dancer trim circuit (process trim) may continue to
correct for tracking (tension) error. Monitor Parameter 119,
process trim output to observe this error. Every 5000 impressions
per hour increase would be a good idea to evaluate whether the
dancer voltage has moved significantly (TP14 & 12), and if the
process trim output (P.119) has increased. Adjust Parameter 562
until the process trim output (P.119) is as close as possible to
zero. The default value for Parameter 562 is 2566, based on a
14-1/32” print diameter. Normal position for the dancer during
this part of the start up is slightly above center, corresponding to
less than 1 volt at TP14 to TP12.
3. The RTP Drive should be tracked at maximum speed with a roll
of paper at least 75% of full roll.
4. If the press is to remain at a given maximum speed for a period of
time, and a significant amount of paper is to be run, the integral
gain Parameter should be set to its final value of 50 (P.567).
HOWEVER, anytime the system is taken to a higher speed, the
remainder of the tracking should be accomplished and again
Parameter 567 should be set to zero until the tracking adjustments
are completed and then returned to the value of 50.
5. The integral gain of the P/I Regulator will remove all of the
dancer movement downward as the roll of paper builds down.
During normal operation with a roll that does not have a large
amount of eccentricity, the dancer should stay at the level position
for the entire run. The process trim output during a normal run
will build in value especially close to core diameter which is
where the belt errors predominate.
6. To adjust the dancer position during normal run, Parameter 553
should be changed accordingly. However, this should not
normally be necessary.