Important
information for Multi-Unit presses from Pacesetter:
Does
this sound familiar?
At
one time your press was brand new and printed with the consistent
performance and dot value of a new press . . . over the years
you observed problems with inconsistent dot value and experienced
increased adjustments to achieve consistent dot value.
How
does this happen?
Over
time a roller becomes hard, pitted and worn creating hickeys.
Eventually the durometer is too high, causing the rubber to
shrink unevenly. Consequently, glazing occurs, as a result
of excessive leaching of extractable oils. The result is a
roller that is about 40 durometer and that will require 10X
the amount of mechanical pressure as a 26 durometer to achieve
the same stripe setting. With additional MECHANICAL PRESSURE
- you get additional UNWANTED heat. Additional ENERGY creates
additional HEAT - the law of science.
Consider
this . . .
The
roller train can only be as good as its weakest link. Consistency
in rollers from unit to unit will deliver consistent water
and ink balance, as well as, consistent dot value from unit
to unit. Unfortunately, the accepted practice when time to
change rollers has been to use “exchange” or used
cores. Used cores lack concentricity to the detriment of press
performance. Regrettably, the objective of replacing rollers
in the press has never been to maintain consistency throughout
the ink train. Therefore, the range of effectiveness of the
individual printing units can go from excellent to very poor.
When starting out with all new rollers in each of the units
- meaning new core, cover and bearings - you have TOTAL
CONCENTRICITY.
Why is consistency in rollers from unit
to unit important?
The
function of a roller is to transfer and split ink, as well
as to work in cooperation with the vibrating roller to fold-blend
ink and water together as to maintain water and ink balance.
Therefore, the performance of the actual press is in the ink
train: Water and ink balance.
How do you obtain and maintain water and
ink balance?
Consistent
pressure and new rubber.
When
you buy a new printing press then look at the press performance
3 to 4 years later, the only thing that has changed is the
performance of the rollers and blankets. Rollers and blankets
in poor condition lack the ability to provide optimum performance
and this significantly affects print quality. The press still
picks up and delivers sheets the same. The main difference
is the - HEART OF THE PRESS - the printing unit: the INK TRAIN.
What
can be done to establish consistency from inking unit to inking
unit?
Pacesetter
presents: A BETTER WAY TO DRESS YOUR PRESS A plan to RESTORE
consistent press performance and maintain:
What
could one year of TROUBLE-FREE printing do for you?
With Pacesetter’s “A Better Way
to Dress Your Press” Program YOUR DOWNTIME WILL DIMINISH
AND SAVE YOU THOUSANDS OF DOLLARS WITHIN THE NEXT FISCAL YEAR
In
a year you could spend $25,000 - $30,000 in down time. When
we put all new cores, cover and bearings in ever unit of the
press we are taking it back to the day you bought it. With
the traditional method of changing rollers - one here - a
few there - the downtime adds up. After a couple hours of
downtime: for each change.
By
changing all inking units at once the press is RESTORED to: