Ryobi DBJ50 Provozní pokyny stáhnout pdf (Strana 65)

Page 56 Power Equipment Usage Manual (Rev. 5/10)

11.2.3. Helpful Hints on Blade Tension

Determining correct blade tension is somewhat subjective. It is learned through experience and is

somewhat dependant on personal preference. A properly tensioned blade will last longer and be much

less likely to break prematurely. If the blade tension is too loose, you will notice that the blade will have

a tendency to drift a lot or slip off-line when cutting and you may also experience excessive vibration or

unusual noise. A blade that is too tight will break prematurely.

Assuming the blade has been properly installed in the blade mounts, when the blade tension lever is

pushed fully back towards the rear of the saw, the blade should be properly tensioned.

Test the blade tension by lightly plucking on the blade, like you would a guitar string, with your finger.

With practice, you will eventually be able to feel if the blade is tight and tensioned correctly. Once

properly tensioned, you are ready to proceed to operating and cutting with the saw.

NOTE: Do not over tension the knob as this can cause premature wear and damage to the machine.

11.2.4. Operating Instructions

A simple, dust protected rocker style on/off switch (a) is located

on the top of the saw (see Figure 5). An ON/OFF foot switch

controls the variable speed, constant torque motor.

The Ex-30 Scroll Saw is equipped with a variable blade speed

control which allows you to select or fine-tune to the exact blade

speed required (from 400-1550 strokes per minute) for best

results based on the type and thickness of material and type of

blade being used.

The blade speed control knob (b) is located on the top of the machine. (see Figure 5)

• To increase blade speed, turn the control knob clockwise.

• To decrease blade speed turn the control knob counter clockwise.

Blade speed selection is subjective and is dependent on a variety of factors: type and thickness of

material being cut, type of blade that is being used, feed rate, required finish quality as well as

experience, personal preference and comfort level of the user. There are no hard and fast rules. Be

patient – practice and experience will be your best teacher.

Here are some general guidelines to consider when selecting/adjusting blade speed:

• For best results and smoothest most efficient cutting, always select the highest blade speed that

you are comfort able using based on your experience and skill level.

• Generally speaking, harder or denser workpiece material requires slower blade speeds.

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Ryobi DBJ50 Provozní pokyny Strana 65