Standen T2 Service manual

T2 / T3
Potato Harvester
Control System
Standen Engineering Limited.
Hereward Works,
Station Road, Ely,
Cambridgeshire.
CB7 4BP
England.
Tel: [phone] www.standen.co.uk Fax: [phone]

The contents of this handbook, although correct at the time of publication, may be
subject to alteration by the manufacturers without prior notice.
Standen Engineering Limited operate a policy of continual product development.
Therefore, some illustrations and/or text within this publication may differ from your
machine.
The copyright of this handbook is the property of Standen Engineering Limited,
Hereward Works, Station Road, Ely, Cambridgeshire. CB7 4BP. This handbook is
issued on the condition that it must not be used, copied or exhibited without their written
permission.
IMPORTANT
This operator’s handbook should be regarded as part of the machine. Suppliers of both
new and second-hand machines are
advised to retain documentary evidence that this
handbook was supplied along with the machine.

CONTENTS
I
NTRODUCTION
Introduction to the handbook 1.1
INSTALLATION
CAN-Bus control system installation 1.2
OPERATION
Starting the system 1.5
To turn off the system 1.5
Operating and setting 1.6
Emergency stop 1.6
Default screen 1.7
Screen select buttons 1.9
Chassis and axle screen 1.10
Setting adjustments and diagnostic feedback 1.12
Chassis and axle flow setting parameter screen 1.12
Flow rate and speed adjustment 1.13
Axle steering parameters 1.13
Powered axle drive parameters 1.13
Chassis and axle feedback screen 1.14
Digger depth control screen 1.15
Digger depth control flow setting parameter screen 1.17
Digger depth control feedback screen 1.18
Webs screen 1.19
Webs flow setting parameter screen 1.20
Webs feedback screen 1.21
1
st
separator screen 1.22
1
st
separator flow setting parameter screen 1.23
1
st
separator feedback screen 1.24
2
nd
separator screen 1.25
2
nd
separator flow setting parameter screen 1.26
2
nd
separator feedback screen 1.27
Spreader / table and discharge elevator screen 1.28
Spreader / table and discharge elevator flow setting screen 1.29
Spreader / table and discharge elevator feedback screen 1.30
Auto start / stop and speed set program screen 1.31
Auto start / stop programming 1.31
Speed set programming 1.32
MAINTENANCE
If the system fails to run 1.33
Removing/fitting control module KS1 & KS2 plugs 1.33
System fuses 1.34
Valve connections 1.34

Introduction to the Handbook
This handbook provides the information for the operation, adjustment and maintenance
of your Standen T2 / T3 CAN-Bus electrical control system. To enable you to achieve
the best results from the machine, the manufacturer recommends that you read the
handbook thoroughly prior to using the machine for the first time.
Throughout this handbook the terms 'front', 'rear', 'left-hand' (LH) and 'right-hand' (RH)
are derived from the tractor driver’s position facing forward in the normal direction of
travel.
Adjustments to the machine may have to be made singly or in combination according
soil conditions. Always allow the machine to settle to a new setting before making
further adjustments.
TRANSPORT WARNING:
WELDING WARNING:
1.1
INTRODUCTION
This symbol indicates important safety messages within this handbook.
When you see this symbol, be alert to the possibility of injury to yourself or
others and/or damage to the machine and carefully read the message that
follows.
Before carrying out any welding on the harvester
always
disconnect
the KS1 & KS2 plugs (item 2 & 5, fig 28) from the bottom of the
harvester control module and completely disconnect the harvester
from the tractor. Failure to observe the above precautions may cause
severe damage to the harvester and tractor electrical systems. For
plug removal procedure see the maintenance section of this
handbook.
Always switch off the electrical control system before transporting
the harvester on the road.

CAN-Bus Control System Installation
The harvester CAN-Bus control system will only operate as a complete circuit. The
system requires a 12 Volt negative earth power supply fed directly from the tractor
battery using only the 50Amp power lead supplied. Red cable to positive (+) and black
cable to negative (-).
Ensure the polarity of the battery connections are made correctly to prevent
damage to the system components.
The touch-screen service terminal (see fig 1) and the slave box (see fig 2)) should be
mounted inside the tractor cab so that controls can be comfortably reached from the
drivers seat.
Care should be taken to ensure the units do not obstruct the driver’s visibility
and access to the tractor controls. Always use existing mounting holes within
the cab, as drilling additional holes may reduce the cab’s integrity and is
illegal.
The cab loom (see fig 3) should be routed into the cab through existing apertures to
allow the 12 pin plug to couple into the front of the slave box. Mount the loom plug
housing to the rear of the tractor cab so that it can be reached from the ground and
through the opened rear window. Connect the display loom (see fig 4) into the plug on
the rear of the service terminal, and route it safely to plug into the 4 pin plug on the front
of the slave box. Connect the power lead (see fig 5) to the cab loom plug.
The tractor loom plug housing is used as the main power lead junction and the power
pins are permanently live when connected to the battery. When all mechanical and
hydraulic connections have been made to the tractor, the harvester loom can be
plugged into the cab loom completing the electrical circuit. Ensure the plug is clean and
dry and has not been dropped on the ground. The plug latch must be fully closed to
ensure correct connection. When not in use, the harvester plug should be latched into
the blank cover on the support stem. The circuit is completed by the manual emergency
stop switch at the rear of the harvester which allows the main power relays to latch on.
INSTALLATION
1.2
Fig 1

Along with the touch-screen service terminal, all of the commonly used ram service
controls are repeated on the slave box (see fig 2).
Slave box switch functions are listed below:
Item 1 - Main system display screen on/off.
Item 2 - Start switch for machine control module.
Item 3 - Program start / stop.
Item 4 - Digger auto-lower, off, manual raise.
Item 5 - Powered axle forward, off, reverse.
Item 6 - Agitation run, stop.
Item 7 - Web split raise, lower.
Item 8 - Machine level raise, lower.
Item 9 - Joystick default functions: North/south axis – Drawbar steer.
East/west axis - Axle steer.
Item 10 - Axle automatic self-centre.
Item 11 - Joystick second functions: North/south axis – 1
st
Omega clod roller height.
East/west axis – 1
st
Omega angle.
Item 12 - Joystick default functions: North/south axis – Elevator fold in/out.
East/west axis – Swan neck raise/lower.
Item 13 - Elevator stop/run.
Item 14 - Joystick second functions: North/south axis – 2
nd
Omega clod roller height.
East/west axis – 2
nd
Omega angle.
Where slave box functions are duplicates of touch pad switches on the service terminal,
the switch on the service terminal will be highlighted when the slave box switch is
operated.
1.3
INSTA
LLATION
Fig 2

INSTALLATION
1.4
Fig 3 Fig 4
Fig 5

Starting the System
The control system has to be turned ON and OFF in sequence to allow the touch-screen
service terminal to start correctly, and to ensure that the machine control module turns
off correctly.
On the slave box, press the red rocker switch (item 1, fig 2) to the ON position. The
following screen will show on the service terminal when it is ready (see fig 6).
On the slave box, press the green START button (item 2, fig 2), this will turn on the
control module on the harvester.
To Turn Off the System
It is necessary to turn off the machine control module before turning off the slave box,
this prevents the module draining the battery.
To turn off, touch the red and yellow emergency stop pad on the service terminal
screen. The display reverts to the screen above. At the screen above, turn OFF the red
rocker switch (item 1, fig 2) on the slave box. The screen will go blank.
1.5
OPERATION
Fig 6

Operating and Setting
When the system has been turned on, the service terminal will display the default
operating screen (see fig 7).
Emergency Stop
The red and yellow emergency stop pad is present on all the display screens, and is
linked electrically to the mechanical emergency stop buttons (item 1, fig 8) mounted at
the rear of the harvester. When any of the emergency stop switches are activated, the
harvester control module shuts down. The service terminal screen reverts to the start
screen, but stays live. All electro-hydraulically operated functions are stopped, leaving
the mechanical drive into the hydraulic pumps still running. If a mechanical emergency
stop button (item 1, fig 8) has been pressed, the button must be reset before pressing
the slave box green start button to restart the control module.
OPERATION
1.6
Fig 7
Fig 8

Default Screen
In conjunction with the slave box, the default screen (see fig 7) allows the operator direct
access to the regularly used functions.
Work lights
The touch pad turns on the relay in the lighting distribution box. The relay is rated to
operate up to 3 x 60 Watt work lights.
Auxiliary
When a water misting kit is fitted, the touch pad turns on the auxiliary relay mounted on
the main CAN distribution board to power the pump motor.
Digger depth adjust
When the digger is operating in auto-depth mode, the digging depth can be increased or
decreased by touching the plus or minus pads on the display. The set depth is displayed
in the box below the touch pads. The + pad increases the depth and the – pad
decreases the depth.
Powered Diablo
The powered diablo option is stopped and started by the touch pad. Speed is adjusted
by selecting the speed box touch pad which will highlight. Rotating the encoder (see fig
1) sets the required speed (clockwise to increase/anticlockwise to decrease), then
pressing the encoder in to set and save the revised speed.
Digger web
Digger web speed is adjusted by selecting the speed box touch pad which will highlight.
Rotating the encoder (see fig 1) sets the required speed (clockwise to
increase/anticlockwise to decrease), then pressing the encoder in to set and save the
revised speed.
Sieving web
Sieving web speed is adjusted by selecting the speed box touch pad which will highlight.
Rotating the encoder (see fig 1) sets the required speed (clockwise to
increase/anticlockwise to decrease), then pressing the encoder in to set and save the
revised speed.
Haulm roller
Haulm roller speed is adjusted by selecting the speed box touch pad which will highlight.
Rotating the encoder (see fig 1) sets the required speed (clockwise to
increase/anticlockwise to decrease), then pressing the encoder in to set and save the
revised speed.
1.7
OPERATION

Agitation
Agitator speed is adjusted by selecting the speed box touch pad which will highlight.
Rotating the encoder (see fig 1) sets the required speed (clockwise to
increase/anticlockwise to decrease), then pressing the encoder in to set and save the
revised speed. Individual shaft stop/start is selected by the touch pads 1, 2, 3.
Sweeping clod fingers
The sweeping clod finger option is stopped and started by the touch pad and the speed
is adjusted by selecting the speed box touch pad which will highlight. Rotating the
encoder (see fig 1) sets the required speed (clockwise to increase/anticlockwise to
decrease), then pressing the encoder in to set and save the revised speed.
1
st
separator scrolls / 2
nd
separator scrolls
Scroll shaft speed is adjusted by selecting the speed box touch pad which will highlight.
Rotating the encoder (see fig 1) sets the required speed (clockwise to
increase/anticlockwise to decrease), then pressing the encoder in to set and save the
revised speed.
1
st
separator clod rollers / 2
nd
separator clod rollers
Clod roller speed is adjusted by selecting the speed box touch pad which will highlight.
Rotating the encoder (see fig 1) sets the required speed (clockwise to
increase/anticlockwise to decrease), then pressing the encoder in to set and save the
revised speed.
Spreader / picking table
The spreader or picking table speed is adjusted by selecting the speed box touch pad
which will highlight. Rotating the encoder (see fig 1) sets the required speed (clockwise
to increase/anticlockwise to decrease), then pressing the encoder in to set and save the
revised speed.
Discharge elevator
The discharge elevator speed is adjusted by selecting the speed box touch pad which
will highlight. Rotating the encoder (see fig 1) sets the required speed (clockwise to
increase/anticlockwise to decrease), then pressing the encoder in to set and save the
revised speed.
OPERATION
1.8

Screen Select Buttons
Down the right-hand side of each screen is a row of common touch pad buttons which
allow quick access to the alternative main screens. From each of these screens, links
are available to access the parameter and diagnostics for all the functions covered by
that screen.
Chassis and axle screen
This screen covers drawbar steer, axle side shift, axle steering and machine levelling.
Digger depth screen
This screen covers automatic depth control, manual depth control and single side lifting.
Webs screen
This screen covers web functions, agitation, web split height, haulm roller speed and
rotation.
1
st
separator screen
Depending on separator configuration, the 1
st
separator speeds and heights are covered
from this screen.
2
nd
separator screen
Depending on the separator configuration, the 2
nd
separator speeds and heights are
covered from this screen.
Spreader / table and discharge elevator screen
This screen covers the spreader / picking table and discharge elevator speeds, height,
and auto-height functions.
Auto start / stop and run program screen
The switch sequences on this screen allow the operator to save alternative operating
programs.
Default screen
This screen covers the commonly used basic speed adjustment functions.
1.9
OPERATION

Chassis and Axle Screen
Drawbar steer
The touch pads operate the master valve and slave valve to move the drawbar right or
left.
T2 axle side-shift
The touch pads operate the master valve and slave valve to slide the axle legs in or out.
NOTE: Manual shut-off valves are fitted to each side-shift ram to allow the rams to be
selected as required and also to prevent inadvertent operation of the rams during
transport.
To prevent damage to the machine, always follow the tracking
procedure outlined in the operator’s handbook.
T3 axle rotate
The touch pads operate the master valve and slave valve to rotate the right-hand axle
leg in or out for transport. A proximity sensor signals when the correct outboard position
is reached.
OPERATION
1.10
Fig 9

T2 machine level
The touch pads operate the master valve and slave valve to raise or lower the right-
hand side of the machine. The machine auto-level touch pad enables signals from the
level sensor to automatically maintain the machine level within the mechanical limits of
the ram.
T3 machine level
The touch pads operate the master valve and slave valve to raise or lower the right-
hand side of the machine. The machine auto-level touch pad enables signals from the
level sensor to automatically maintain the machine level within the mechanical limits of
the ram. NOTE: A manual shut-off valve is fitted to the level ram.
T2 axle steer
Axle steering is controlled by a rotary potentiometer on top of each kingpin. A double-
acting valve for each wheel is then driven by the control module to maintain the tracking.
Touch pads on the service terminal, or the left-hand joystick on the slave box, operate
the steering with the centre button triggering the self-centre routine. The wheel angle is
repeated on the display, with the centre button being highlighted when the centre routine
is running.
T3 axle steer
Axle steering is controlled by a hall-effect rotary sensor linked to the top of the right-
hand kingpin. A double-acting valve is then driven by the control module, with a
hydraulic loop circuit to maintain the tracking. Touch pads on the service terminal, or
the left-hand joystick on the slave box, operate the steering with the centre button
triggering the self-centre routine. The wheel angle is repeated on the display, with the
centre button being highlighted when the centre routine is running.
T2 axle drive
The powered axle drive is controlled by a pair of double-acting valves. The touch pads
on the service terminal, and the rocker switch on the slave box, switch the drive into
forward or reverse. On the service terminal, the override button boosts the system to
maximum pressure for bad conditions.
T3 axle drive
The powered axle drive is controlled by pair of double-acting valves. The touch pads on
the service terminal, and the rocker switch on the slave box, switch the drive into
forward or reverse. When the axle rotate limit-switch operates, the control module
reverses the drive rotation for the right-hand wheel. On the service terminal, the override
button boosts the system to maximum pressure for bad conditions.
1.11
OPERATION

Setting Adjustments and Diagnostic Feedback
From the first screen, two further levels of each display are accessible.
Service symbol
This touch pad is used to switch on the screen for the next level of parameters and the
diagnostic level of the control system.
Page return
When the service levels are selected, this switch pad will appear which is used to return
to the previous level on the service terminal.
Chassis and Axle Flow Setting Parameter Screen
This screen is the first level of flow settings and control parameters. It is accessed by
pressing the service symbol pad on any of the individual setting screens when the
service symbol appears.
OPERATION
1.12
Fig 10

Flow Rate and Speed Adjustments
Flow adjustment is a basic setting which is available on all ram functions, and is carried
out in the same way on all flow and parameter screens. The flow % box, adjacent to
each function switch pad, shows the percentage flow set on the valve spool. Select the
required box by touching it. The box will highlight in red when selected. The speed
boxes are selected in the same way. When highlighted, rotating the encoder (see fig 1)
sets the required percentage (clockwise to increase and anticlockwise to decrease).
Press the encoder in to set and save the revised percentage. The select box changes
colour from red to black. When the box changes to black, the revised flow percentage is
operational and will remain as the parameter setting until any further change is made.
Axle Steering Parameters
In addition to the flow percentage settings on the axle steering valves, settings are also
available to adjust the tracking of the wheels.
T2 Axle Steering Parameters
On T2, the right-hand wheel is used as the master wheel to control the tracking. This
can be adjusted for its centre position by selecting the ‘OFFSET‘ box which will highlight
in red. Rotating the encoder sets the required degree of offset (clockwise to increase
and anticlockwise to decrease), then pressing the encoder in to set and save the revised
figure. The select box changes colour from red to black. When the box changes to
black, the revised offset angle is operational and will remain as the parameter setting
until any further change is made. With the right-hand wheel set, the left-hand wheel is
matched to it by adjusting the ‘OFFSET’ as above, until the wheels centre in line. These
settings should be made with the wheels jacked off the ground or, if made in the field,
with the machine being moved backwards or forwards to minimise resistance from the
ground which would cause false readings.
T3 Axle Steering Parameters
On T3, the right-hand wheel is used as the master wheel to control the tracking. This
can be adjusted for its centre position by selecting the ‘OFFSET‘ box which will highlight
in red. Rotating the encoder sets the required degree of offset (clockwise to increase
and anticlockwise to decrease), then pressing the encoder in to set and save the revised
figure. The select box changes colour from red to black. When the box changes to
black, the revised offset angle is operational and will remain as the parameter setting
until any further change is made. The left-hand wheel is then set hydraulically as per the
instructions in the T3 manual.
Powered Axle Drive Parameters
Additional parameters are applied to the powered axle drive to allow the operator to tune
the system to suit conditions.
Wheel rolling circumference (T2 only)
This is able to be set for each wheel individually to accommodate the alternative wheel
sizes that can be fitted to the T2. The control module meters the oil from the two spool
valves to ensure that the circumferential speed of the wheels match, thus minimising
wheel slip. The LH and RH wheel circumferences in millimetres are entered on the
service terminal screen. For example: Tyre size 420/70 R24 circumference = 3714mm.
Tyre size 560/60 R22.5 = 3807mm. Tyre size 560/45 R22.5 = 3374mm etc.
1.13
OPERATION

Axle drive flow
This is set to match the wheel speed to the forward operating speed of the machine.
Axle drive pressure
The pressure is set to a lower value to maintain the constant working assistance
required and minimising the power used.
Chassis and Axle Feedback Screen
The feed back screen is used as a diagnostic display which shows the electrical status
of the control system.
System voltage
This shows the voltage supply to the machine from the tractor.
Sensor supply
The depth and steer sensors work at a nominal voltage of 8.5 volts.
Slave supply
The slave box joysticks operate at a voltage of 5.0 volts. These voltages are displayed
on all the feedback screens.
OPERATION
1.14
Fig 11

Master A / Master B
The master valve operates proportionally in front of the slave check valves. The display
shows the current in mA feeding the proportional coils. The boxes marked ‘SEAT’ show
the current in mA feeding the slave check valve coils operating simultaneously. These
currents are displayed on all the feedback screens.
Axle drive and steering coils
The proportional operating current in mA is shown in the relevant boxes as the valves
are operated.
Digger Depth Control Screen
Digger depth adjust
When the digger is operating in auto-depth mode, the digging depth can be increased or
decreased by the touch pads on the display. The set depth is displayed in the box below
the touch pads. The + pad increases the depth and the – pad decreases the depth.
1.15
OPERATION
Fig 12