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- Install and center the new blanket on the machine, taking care to
insure that all rolls and cylinders are parallel to the main cylinder,
and that the belt is not stretched on either selvedge.
- Set the tracking roll in its neutral position, so that it is parallel
with all other cylinders, and disconnect the activation system so that
it does not track.
- Before setting the machine in motion, apply heat to the cylinder and
allow the temperature to reach 300° F (150°C).
NOTE: Be careful not to greatly exceed this temperature before starting
the machine as the felt may otherwise shrink in an irregular manner.
- Once this temperature is reached, start the machine at one (1) meter
per minute. If tension is necessary to remove obvious slack from the
felt, apply only enough air pressure to turn the felt. Be sure that
either side of the tension roll is equidistant to the other. This is
critical.
- Continue to increase the temperature until it reaches 500° F (260°C).
Allow the blanket to run at this temperature for one and a half to two
(1-1/2 to 2) hours at one (1) meter per minute. The slower the better.
Try not to exceed (1) mpm.
NOTE: This slow speed in conjunction with a temperature of 500°
F (260°C) is mandatory for proper heat setting. If this temperature
is unobtainable on your machine, achieve the highest temperature possible
and extend the dwell time accordingly.
- After running slowly for one and a half to two (1-1/2 to 2) hours
at 500°F(260°C) set the cylinder temperature to the correct
operating level - normally 410° F (210°C).
- Continue to rotate the felt at (1) meter per minute while the cylinder
cools down.
- Once reaching the operating temperature, engage the tracking mechanism,
reset the feeler gauges, and apply the machine manufacturer's recommended
air pressure to the tension roll. (Be sure that the tension roll raises
uniformly from side to side.)
- NOTE: Each manufacturer suggests a different air pressure, but generally
40-90 PSI (3 - 6 bars) is suggested. Remember: The less air pressure
applied, the better it is for the bearings, cylinders and felt blanket.
Once step No. 7 is completed, the speed of the felt may be increased
to that of production speed.
The felt should be watched for a few minutes to confirm proper tracking.
- Should the felt favor tracking to one side of the machine over the
other, remember that it will travel to the side with the least amount
of tension. Therefore, one of the idler rolls (usually the rear idler
roll) may be raised slightly on the side that the felt wants to travel
to, while the other side of the roll remains unchanged.
- For subsequent start-ups from cold, first bring the cylinder temperature
up to 200° F (95°C)before turning the blanket. Once reaching
200° F (95°C)begin running the blanket slowly, one (1) to two
(2)meters per minute, while the temperature continues to rise to your
normal operating temperature. Upon reaching operating temperature proceed
to operate normally.
- To stop production and cool the machine down, we recommend running
the felt until the cylinder temperature drops to 200°F (95°C).
At 200°F the blanket may be stopped, if desired, and the cylinder
subsequently allowed to cool completely without turning.
- By following these instructions, proper tracking will easily be achieved
and months of service easily obtained. We thank you for your patronage
and encourage you to share any of your comments and/or suggestions with
us.
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