| 1.
CT-TRACKING ROLLER ASSEMBLES CT-Tracking
roller assembly (TRA) consists of two rectangular steel
tubing frames. One is stationary, the other is movable;
it is supported in a nylaguide sliding block and arcuate
bar system, and has ab idler roller at either end. The
web can be fed over the TRA in a ‘U’ shaped
path, reversing its direction of travel, or thought
the TRA in a ‘z’ configuration .maintaining
the same direction of travel. It is insensitive to attitude
and can even be mounted upside down. Solidly supported
on all four corners by nylaguide bearings, it is not
subject to deflections caused by cantilever stresses.
Radial bearings are sealed, and linear bearings are
self-lubricating. The unit therefore requires no maintenance.
|
2.
THE PRINCIPLE
The TRA is designed so that it swings in an arc laterally,
pivoting about an imaginary pivot point located exactly
in the plane of the entering web path. The servo cylinder
swings the other end of the frame, moving the outgoing
web laterally back into the desired web path. Because
the TRA correction range is increased by lengthening
the span. Therefore the correction angel can be kept
small to reduce induced stresses to the level desired.
Because stresses can be kept minimal, the TRA can be
used to guide within the tension loop on your process.
It can be installed successfully on lines handling fragile
material such as parchment paper, thin metal foil, or
saturated paper even when other guiding methods have
failed. It can also be used to make extremely large
corrections in the web path, even displacing the shifting
unwind, because of its very low inserted stress level. |
3.
CENTER GUIDE SYSTEM
CT movable sensor guide systems are used primarily
on processes to center the print regardless of
web width variations during the process. The system
will sense web width variations up to four (4)”inch
with moving the sensor or affecting results, an
in most cases will eliminate misprint process.
Center guide can be used where great width variations.
Its uses two air flow sensor each mounted on a
nylaguide block and bar support connected to opposite
sides of a common cable and two pulley arrangement.
A single servo cylinder drive the air flow sensor
in opposite direction the airflow censor in opposite
direction the airflow sensor are there for always
equal distant from the material centre line.
One air flow sensor signals a power unit first
which activates the servo cylinder the other air
flow sensor give signals to second power unit
which activities the pivot assembly. Through very
reliable and able to a adjusor width changes automatically. |
|
|
4.
DESCRIPTION
Standard adapter bases consists of a stationary
floor-mounted frame or plate, a for unit, standard nylayguide
bearing and support system, and a moving frame or plate.
A heavy duty servo cylinder is nested between the frames
and the nylaguide bearings. The servo cylinder moves
the upper adapter base plate back and forth in response
to hydraulic signals from the power unit. |
