5. Advance is controlled by turning the directional switch (4) to the right or left and by the speed control (5). Advance
pressure is monitored electronically and reduced automatically when increased resistance is met (e.g. when cut-
ting through steel reinforcement). This ensures that the blade does not stall.
6. The saw can be switched off in critical situations by pressing the emergency OFF button (8) or, in the case of the DS-
CB3 remote control unit, by turning the on/off switch to position (2).
10.3 Semi-automatic control of saw head advance
– Once initially set, the system regulates itself, i.e. when heavy reinforcement is encountered, the saw head
reduces the advance speed automatically and continues with a “stop and go” effect.
– The operator is not required to adjust the controls constantly and can relax a little while supervising the saw-
ing procedure.
–
Advantages
Inexperienced operators can begin sawing productively after only a short time and experienced operators can
achieve extremely high efficiency.
10.4 Important information on operating and controlling the system
– The D-LP 30 (LP 20) DS-TS 30 is a very powerful system. The guide cut should therefore always be made with
the saw arm in the “trailing” position and at reduced power.
– A guide cut should be made to a depth of 5 cm (approx. 2.5 cm in London flint).
– Adjust to the optimum / maximum advance speed during the first full cut at the corresponding cutting depth
(approx. 15 cm) and a hydraulic pressure of 160-190 bar. Make this adjustment by turning knob (5) to a high
setting, while the saw is cutting in a section of the concrete which you consider to represent “normal” condi-
tions, so that it cuts at a steady rate with no “stop and go”. The adjustment should not be made, for exam-
ple, when cutting a rebar lengthways or in a similar situation.
– Do not make sudden adjustments. Give the system time to react to the adjustments.
– Operating the saw with various electric supply fuse ratings:
The system provides maximum power (= 30 kW input for the LP 30) when connected to a supply with a rat-
ing of 63 amps. At 32 amps only about half power is available, but the settings on the remote control unit do
NOT change.
– If the blade sticks or stalls:
This happens from time to time. The safety system is activated immediately (the pressure release valve on
the D-LP 30 (LP 20) is set to 210 bar). This situation presents no risk to the operator or the saw system. The
operator should react by reversing the direction of advance. The saw blade then usually begins to rotate again.
If not, the arm must be pivoted to lift the blade out of the kerf. These steps should be taken without delay. The
blade drive motor should be switched off if it takes longer than approx. 1 minute to free a sticking / stalled
blade.
– It is more efficient to make a shallow cut at a faster rate of advance than to cut slowly at great depth.
– The pressure gauge (item no. 310653/1) can be fitted to the pressure circuit if required.
10.5 Starting the saw system and beginning the sawing procedure
– Adjust the amp control knob (6) to 32 or approx. 55 amps, (depending on the mains supply).
– Start the electric motor by turning the switch (2/1). Wait until the motor switches from star to delta (audible)
before operating any other controls.
– Using the advance direction control knobs (3) and (4), bring the saw into the starting position while adjusting
the advance speed (5).
– Switch on the water supply and adjust knob (7) until the saw blade motor is running at the appropriate speed.
– Begin the plunge movement (knobs 3 and 5) and bring the blade to the depth of the guide cut. Continue the
guide cut (using knobs 4 and 5) at reduced pressure (approx. 100 bar).
– Keep your eye on the pressure gauge if necessary.
– Make subsequent cuts at full power (approx. 160-190 bar) using knobs (3), (4) and (5). Adjust the advance
control (5) for optimum advance speed.
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