Setting the Grinding Head
Dinasaw® Bandsaw Sharpener
CENTRING THE GRINDING WHEEL:
It is important the grinding wheel is aligned precisely on the centerline of the blade. The method used is to rotate the grinding head about the retaining axis, which connects the grinding head to the motor arm. The procedure varies between the standard straight sharpener and the beveling model but the principle remains the same.
Standard Model Slightly loosen the 8mm retaining bolt (85) which fastens the plastic motor shroud (84) to the motor arm knuckle (82) to enable the head to be rotated about this axis. Index the blade through until the back of an unset raker tooth is directly beneath the grinding wheel.
Lower the grinding head close to the back of the raker tooth and rotate the head through about 20° either side of centre and note the gap left between the wheel and the tooth back. Should more gap show when tilted towards the operator (front) side, then the head will have to be moved away from the operator or vice versa.
ALIGNING THE GRINDING HEAD:
Step 1:
(1) An initial coarse adjustment is made by rotating the motor arm tube (71) about its retaining hole in the motor arm pivot block (120). This is done by loosening the 6mm clamp bolt (42) in the pivot block (120) and twisting the motor arm until the gaps left between the wheel and the tooth back are approximately even on both sides (within 1mm). See Fig. 17. Reclamp the motor arm clamp bolt (42).
Step 2:
The fine adjustment is made by turning the pivot bolt (117) with the 13mm spanner. See Fig. 15. This moves the whole assembly across along the bolt’s axis. Turning the bolt clockwise moves the assembly towards the operator (front). This screw has only limited adjustment. Continue to check the gap and make this adjustment until satisfied that the gap remains exactly the same between both sides when the head is tilted.
Step 3:
Bring the grinding head back to square and tighten the 8mm head retaining bolt.
BEVEL HEAD MODEL:
The head on this model is able to be rotated about the securing axis without loosening the 8mm head retaining bolt . This is achieved by first removing the plastic plug which seals the end of the motor arm. This exposes the head of the M6 socket cap screw and the top of the worm rack.
(1) Fit the dogged end of the 16mmø (5/8”ø) tube spanner to engage the slots in the end of the worm rack and pass the long end of a 5mm hexagonal key through it’s center and loosen the
M6x70 socket cap screw. Turning the tube spanner enables rotation of the head about it’s retaining axis. See Fig. 16.
TO MOVE THE GRINDING HEAD:
Step 1:
An initial coarse adjustment can be made by rotating the motor arm tube about its retaining hole in the motor arm pivot block. This is done by loosening the 6mm clamp screw in the pivot block (B21) and twisting the motor arm until the gaps left between the wheel and the tooth back are approximately even on both sides (within 1mm). Reclamp the motor arm. See Fig. 15.
Step 2:
The fine adjustment is made by turning the pivot bolt with the 13mm spanner which moves the whole assembly along the bolt’s axis. See Fig 15. Turning the bolt clockwise moves the assembly towards the operator (front). Continue to check the gap and make this adjustment until satisfied that the gap remains exactly the same between both sides when the head is tilted. See Fig 17.
Step 3:
Bring the grinding head back to square with the tube spanner and retighten the M6 socket cap screw .
It is also possible to rotate the head by moving the bevel cam follower (B27) into the depressed lobe of the cam and using two fingers, move the cam follower out to actuate the bevel head while checking the gap between the tooth back and the wheel. See Fig. 18.
