DIAQUIP QHS-400 Manuel de l'opérateur - Page 13

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OPERATION

Proper Support for the Workpiece

Support the workpiece on in such a way

that the kerf will not pinch down on

the blade.

Secure the workpiece so that it will not

roll, slip away or move due to vibration

while cutting

The cutting sequence is important when

making cutouts. Always make the last cut

in a way that avoids the blade being pinched. Thus, make the bottom horizontal cut first,

then the sides and finally make the top horizontal cut last.

Make note of the weight of the workpiece and the direction which it will fall when it is cut

through.

Whenever there is a situation where severing the workpiece will cause a hazardous

situation, leave a tab of material intact and finish off the operation with a chisel or the like.

Cutting Technique

Holding the machine with both hands to resist the start up torque, press the release button

and then squeeze the trigger switch.

Allow the machine to reach full speed before contacting the workpiece.

Adjust the water flow as needed by turning the water feed valve.

Then gently begin the cut with the rear portion of the blade until the kerf is established.

Make the first cut in the forward direction (so that you can see the line of cut). Then make

following cuts in the backward direction.

Do not try to cut too much depth in one pass. Never exceed about 50mm (2") per pass. It

is better to cut in multiple passes to minimize the cutting contact area of the blade and

keep the blade spinning fast.

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OPERATION

Cutting Technique (continued)

Release Button

Stopping

Trigger Switch

Release the trigger to stop the machine. After the trigger is released, the blade will continue

spinning for a time.

WARNING: Do not set the machine down until the blade has stopped turning.

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It's a good idea to first cut a shallow guiding groove in the forward direction before

proceeding to make the main cut in the backward direction. If any correction is needed.

Lift the blade and cut slightly ahead and then back into the existing kerf. Take care to avoid

the blade being pinched.

In round workpieces, the best technique is to use a slow, uniform back and forth motion

while cutting with the bottom quadrant of the blade.

Do not allow the machine to bog down. Limit your feed pressure to keep the blade spinning

at high speed.

Never side load the blade in the kerf.

If the workpiece is very heavy and may cause a hazard when it is cut through, do not cut

all the way through the material. Leave some tabs of material intact and then finish the cut

with a chisel or similar tool.

Concrete cutting is very stressful for the motor: After the cut is finished, it is a good practice

to run the machine at no load for a short time to lower the motor temperature before

stopping.

1. Forwards

2. Backwards

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