REDUCING BANDSAW TECHNOLOGY BY EWD

EWD reducing technology stands for tailor-made installations
in medium and large sawmills.

The reducer bandsaw allows to process large sawing heights with a minimum
saw kerf. The positioning of the saw kerfs and therefore the production of any
lumber size required is basically unlimited.

With the modular design of the EWD Bandsaw Technology every conceivable task
in today’s sawmill industry can be solved.

With feed speeds in excess of 120 m/min, the reducing bandsaw technology not
only satisfies highest recovery requirements, but also the need for high throughput.

ZE 2 – ALIGN AND INFEED SYSTEM

The completely new designed align and infeed system ZE 2 with top-mounted
skewing frame and top activated roller pairs offers many advantages:

• precise rotation according to 3D measuring data
• positioning either to machine center line, parallel side shift or diagonally to
  the machine center line (skew),
• minimum log gap even at highest feed speeds
• cant alignment based on 3D scanning and sawing pattern optimisation
• modular design
• FZ1 chipper canter possible optionally
• Easy access for routine checks and maintenance works.
• less cleaning required due to construction opened at the bottom

PF 19 Zerspaner

The chipper canter PF 19 is used in Circular Saw or Reducer Bandsaw lines
and also in Profiling lines for chipping of two parallel faces on logs or cants.
The width adjustment of the chipper head supports is done by servo-hydraulic
setworks.

• Straight knives and spiral knives chipper head with pre- or post-sawing segments
• precise servo-hydraulic positioning systems
• tool change position
• chips meet the high quality requirements of the pulp industry
• The produced chips meet the high quality requirements of the pulp industry.

chips

The produced chips meet the high quality requirements of the pulp industry.

Speed

The chipper head revolutions are controlled by a frequency converter as a function
of feed speed and desired chip lengths.

Straight knives / Spiral knives

Optionally, the chipper canter PF 19 can be fitted with either straight knives, spiral
knives or stepped knives heads.

The different head types are matched by the number of tools installed to the desired
speed range.

All heads are fitted with either pre- or post-sawing circular saw rings, depending on
the purpose.

EBT Reducer bandsaw

The reducer bandsaw allows to process large sawing heights with a minimum
saw kerf. The positioning of the saw kerfs and therefore the production of any
lumber size required is basically unlimited.

• installation possibilities: Twin, triple or Quad
• wheel diameter 1200, 1400, 1600, 1800 mm
• universal bandsaw machine system without chipper canter, no merry-go-round-
  system required
• hydraulic EWD bandsaw strain system with fast reaction time and instantaneous
  shock absorption for high precision
• precise, servo-hydraulic positioning systems
• sawblade deviation detector
• tooth detector
• detection of cracks in sawblades with direct warnin in eWood
• blade guides are pressure guides with linear bearings, adjustable in height by
  servo-hydraulic cylinder
• roller bearing principle free from bending stress
  - minimum bearing wear, highest precision and smooth running.
• automatic blade cleaning and lubrication unit
• precision grinded, balances bandsaw wheels made of spheroid graphite iron
• inclination of the top wheel can be set by means of an electric motor

eWood

eWood is a comprehensive optimisation and application software from EWD.
All modern EWD sawlines and machines share the same eWood user interface.

The interface man – machine offers an intuitive and consistent user concept,
allowing effective use of the functions after just a short training period.

• Most modern measuring technology
• Professional optimisation and application software

In addition to solid and time-proven mechanical engineering, efficient system
controls are essential prerequisites for the high efficiency and yield of the
EWD Reducing Bandsaw Technology.

• definition of flexible maintenance plans
• user management
• functionalities
• user-related
• data collection per day/month
• single log report
• export / print / eMail
• saved in SQL database
• graphic processing

Collectable data

• input volume
• output volume
• main products
• sideboards
• number
• work time
• break times / downtimes

FBS Flying Bandsaw

• For very high demands on performance and sawing accuracy, we use the active
  saw guide system FBS with intelligent magnets.
• Relieving the saw blade of stress through conventional pressure guides allows the
  introduction of higher saw strain and higher saw speeds.
• Exact guiding of the saw blade in the saw track by the magnetic forces of the FBS
  technology enables significantly faster feed rates.

The results are:

• constant accurate sizes
• notably higher production and recovery.

Controls and Operation

• clear user interface with clear menu navigation
• constant display of information
• various automation possibilities
• display of sawing lines with camera system
• decentralised structure of the control system
• cutting pattern management
• data storage and management / optimisation of cutting pattern by PC
• visualisation of the plant functions
• remote maintenance, diagnostic and statistic functions
• export / print / eMail
• graphic processing