Dressing the Grinding Wheel
Dinasaw® Bandsaw Sharpener
DRESSED GRINDING WHEEL:
When new, the Grinding wheel has a square edge around the rim, which must be dressed to a shape, which will conform to the tooth shape. This is done with the dressing stick supplied by holding it against the rotating wheel.
Before commencing the wheel dressing procedure be aware that a large quantity of grinding dust can be released and it is most important that suitable face protection and a dust mask are worn. Grinding wheels are brittle and run at high speed and inhaling grinding dust may cause some severe respiratory diseases. Treat grinding operations as always potentially dangerous. Do not use chipped or cracked wheels.
Raise the grinding head to the upright position and fit the grinding wheel (107) to the motor spindle (91). Note the left-hand thread on the knurled retaining nut (93). Check the wheel is secure and rotate by hand ensuring it spins true. Fit the bottom guard. Press the “Grinder” button being aware that at this stage, the integrity of any new wheel is unknown and should always be regarded as suspect until it has operated at speed for at least one minute. During this initial “run in” stage, stand behind the wheel guard with no bystanders around and do not touch the wheel with the dressing stick.
When satisfied of the wheel’s integrity, hold the dressing stick against the wheel’s periphery so as to dress a radius on the corners of the grinding wheel. Slightly more material should be removed from the outer lower edge (away from motor) as per Fig.13. This will approximate the final wheel shape which should hold form throughout its life. The grinding wheel will require periodic dressing to refresh the cutting grit. The form which the wheel takes should be maintained as long as the grinder is used for profiling the whole tooth and not just the tooth face or back individually.
When a new wheel is installed on the grinder, it may require shaping. If it does not require shaping, it still may need to be trued. Truing the wheel ensures that it is perfectly round, as it is centered on the arbor. This is necessary to eliminate vibration. Both truing and shaping are done with the dressing stick that is supplied with the grinder. Replacement dressing sticks are also available from your dealer. Diamond tipped dressers are also available.
The shape of the wheel will affect the shape of the tooth being ground. Due to the unique design of the Dinasaw Profiler, the wheel shape is ultimately a function of the cams, as it wears evenly over all contact areas. If you are trying to change the shape of a tooth profile (i.e. increasing the hook angle), you will find that the wheel will wear more in one area and will have to be dressed as a result. The wheel shape should look like that in Fig. 13.
