Servo -Torq® Extrusion Cutting Systems

The widest range of rotary servo cutters on the market. The Servo-Torq®
series of machines extend from table-top versions through to ultra
high performance units. OD capacities of up to 300 mm are available.
Every Servo-Torq® cutter uses a state-of-the-art AC brushless digital servo
motor to control their ultra high-speed flying-knife rotary cutting action.

Servo-Torq® Standard

Unbeatable value

• Ultra-tough general purpose design for 'real world' use
• Available in four power levels and cutting capacities of up to 300 mm OD
• 6-digit cut length counter with LED display
• Precise encoder length measurement in 0.1 mm increments
• Seamless cut control for up to 2,000 cuts/minute (one blade)
• Blade speed adjustment between 25% and 100%

Servo-Torq® Plus

Siemens TP177 touch-screen control as standard

• Advanced TP touch-screen for a leap forward in cutter control
• Precision rotary encoder length measuring in 0.025 mm increments
• Integral Siemens S7 PLC with EPROM memory back-up
• Parts storage of cut length, batch and total cut quantity
• Profibus, Ethernet and remote modem networking options

Servo-Torq® Ultra

Ultimate cutting performance

• Perfect for high speed medical and small tube production
• Fully digital 3-axis AC servo motor control for optimum precision
• One motor directly drives the blade; two motors drive the infeed belts
• Perfect product feed with infeed belts moved closer to the blade
• Ideal for micro-tubing thanks to the tilt belt and air feed bush options
• Faster cutting response due to the ultra light weight blade head design
• Cuff, bubble and taper tube software options available

Servo-Torq® Mini

The baby of the range

• Table top unit with a very compact foot-print
• Designed for off-line use or lower volume in-line work
• Integral servo caterpillar infeeder as standard
• Available as a complete off-line cell with a low-tension pay-off system
• Ideal for smaller flexible and semi-rigid extrusions (30 mm OD max)

Servo-Torq® Maxi

The choice for cleanly cutting rigid plastic

• Ultra high speed flywheel blade design (one or two blades)
• Exceptionally long cutting edge for a swarf/whisker free cut face
• A square cut without the need to move the cutting head
• Suitable for cutting larger rigid plastic extrusions

Servo-Torq® Rotary Cutter Range

1 Expressed in Stall Torque @ 3000 RPM (Dynamic Torque).
2 Figures refer to max. cut rate in On-demand & SpeedCut™ modes with one blade fitted.
3 Higher figure applicable when an optional torque enhancer gearbox is fitted.

The table below shows standard and optional equipment levels. Detailed specification sheets are available on request.

Servo-Torq® Equipment Levels

Accra-Feed™ Caterpillar infeeder/haul-offs

A range of precision twin-belt caterpillar puller units to measure and feed extrudate accurately into our cutting machines. They also provide superb speed holding for improved extrusion pull-down control.

Ultra-Accurate™ UA caterpillar range:

Top-of-the-range for the ultimate in performace:

• For high linespeeds, high power and high performance
applications.
• Each belt is individually powered by an AC brushless servo
motor driving through an extremely efficient planetary gearbox.
This gives minimal loss of power and a super smooth pull.
• Perfect synchronisation with each motor having it’s own servo
drive control linked via a fibre-optic network.
• Maintenance requirements are virtually nil.
Just belt wear – that’s it.

Accra-Feed™ UA Range of Caterpillars

Ultra-Accurate™ Value caterpillar range:

• Recommended for slower linespeeds and general
purpose applications.
• The drive to the twin belts is via a vertical drive shaft and
two sealed-for-life spiral bevel boom gearboxes.
• Either conventional motors (AC Vector)
or brushless AC servo motors can be selected.

Accra-Feed™ Value Range of Caterpillars

All Accra-Feed™ caterpillars have a specification which
reflects their high quality build:

• Two vertical and one horizontal guide-in rollers.
• Poly-vee caterpillar belts and drive rollers for perfect tracking.
• Wide choice of belt coverings are available.
• Full CE guarding for total operator safety.
• Extensive line of options for total customisation.
• Ultra-durable construction for decades of use in the
toughest environments.

Conveyor collection systems – Automate to save money

A conveyor belt positioned after the cutter will automate cut piece collection.
It also gives improved length accuracy and cut quality by supporting the
extrudate as it exits the cutter.

Multiple collection bins allow batches of cut lengths to be sorted.
If scrap is produced the collection system will be automatically
by-passed.

Although often overlooked, conveyor systems can bring
many cost saving benefits:

• Save labour costs by automatically batching cut lengths
• One operator to handle a number of lines
• High speed - can operate in-line at the fastest linespeeds
• Improve length accuracy and cut finish by supporting
the extrudate as it exits the cutter

Special stainless steel and medical versions are available.

Off-line cutting cell with Sonar loop tension control

Designed for off-line use, our cutting cell consists of:

• Servo-Torq® Mini servo 'fly-knife' rotary cutter
• Integral Accra-Feed™ servo caterpillar infeeder
• Sonar low tension loop control device
• Powered un-wind stand (single & twin versions available)

The system is ideal for cutting flexible plastic and rubber extrusions off-line. It is particularly suited to working in medical clean rooms or automotive production cells.
The product is pulled off the un-wind stand by a powered nip roll unit. The speed of the nip roll is controlled by the sonar loop unit.
This ultra-sonic loop control system minimizes stretch and distortion. This enables the Servo-Torq Mini cutter to achieve very accurate cut lengths.

Saw & Circular Blade Cutting Systems

Cost effective solutions for cutting a wide variety of extruded materials,
from rigid plastic extrusions, through to metal reinforced profiles and
wire braided hose.

Travelling saws for rigid plastic profile & pipe

Servo & air driven
Our range of up-stroking saws provide an effective answer for cutting rigid
plastic pipe and profile. The moving carriage can either be moved by servo motor
or an air cylinder.
The fully adjustable clamping system guarantees a square cut, while the optional
swarf extraction system keeps the cut end clean.

Metal-Cut™ circular blade cutters for metal supported profiles

Braid-Cut™ for stainless steel braided PTFE tube cutting

Cut stainless steel braided hose cleanly
Not only does this machine cut through stainless braided hose, but uses
an integral welding head to fuse the wire ends together. This leaves a
perfect cut finish. Fully PLC controlled, the advanced program ensures
total synchronisation between the welding & cutting.

COILERS AND WINDERS

The Series 5 range of single and twin-head reelers (photo A1) are designed for the low-tension coiling of plastic or rubber tube, hose, pipe and profile.

The main benefits to the user are:

• Low tension coiling removes the possibility of the extrusion being stretched or distorted as it is being coiled.
• We offer a choice of Uhing® roller-box or servo motor traverse mechanisms for perfect layering control.
• Wide range of quick change mandrels and coiling heads.
• Accurate length measuring of coil lengths with ultra-precise encoder systems
• Option to have an automatic cutter installed.
• Easy-to-use controls with option of PLC and touch-screens for easier organization.
• New technology reduces maintenance downtime considerably.

Mode of Operation

The coiling heads can either be fitted with stub shafts to accept customer’s own reels of with a range of collapsible ‘self-tie’ coiling assemblies.

A fully automatic traverse mechanism is provided to ensure neat side-by-side layering from start to finish. The traverse is easily set to suit tube and profile from 1 to 50 mm wide. For basic reeling applications a Uhing® roller box system is used to control the traverse. For more complex and delicate applications a servo controlled traverse mechanism is recommended.

An auto-stop facility stops each coil when the correct amount of material has been wound-on. Twin length counters can be supplied to make it possible to set different lengths for each coil head.

The maximum coiling speed is set using a ten-turn potentiometer. The coiling tension and exact matching of linespeed is achieved by either a light-weight dancing arm or an ultra-sonic loop detector.

A guillotine cut-off facility is available as an option as are a wide variety of different coil heads, including collapsible mandrels.

PAY-OFFS AND UN-WIND SYSTEMS

We can also supply a wide range of solutions for un-winding tube, hose and profile from drums, bobbins or loose coils.

The photographs here show two examples:

• A loose coil of medical grade flexible PVC tube being feed into our Servo-Torq® Mini rotary cutter off-line cutting station. The turntable is braked to prevent over-run. It can also be tilted to ease the unwind process

• A large metal drum on our roller bed unwind system. This version is designed for heavy coils or drums which cannot be easily lifted. Again it is feeding into a Servo-Torq® Mini off-line cutting system, this time with in-line ink-jet printing and flaw detection.

In both cases we have used our Ultra-sonic sonar loop detector to control the speed of the unwind process relative to the cutting speed.

We can also supply un-wind and wind-up systems for creating accurately measured small coils from a single large drum of material.