Feed Pawl Adjustments
Dinasaw® Bandsaw Sharpener
ADJUSTING THE FEED PAWL:
The Feed Picker (59) height must be adjusted to place the picker as far forward into the front face (hook) of the tooth as possible. This ensures the picker does not have the opportunity to catch in the gullet or high up the face of the tooth, causing irregular tooth placement to the grinding wheel. The height of the picker is set by loosening the Clamp bolt (55) and turning the Height Adjuster Tab around so it rests on the top of the rear plate while presenting the tooth picker at the correct height into the tooth. Additionally a pawl guide is positioned below the Pawl Arm (52) to minimise sideways movement. Loosening it’s retaining bolt, which then allows the guide to be turned to a position to capture the pawl arm when in it’s lowest position. It is generally preferable that the Feed Pawl Block (45) moves evenly over an arc either side of vertical. To achieve this may require the picker protrusion from the clamp to be lengthened or shortened relative to the Feed Pawl Arm (52).
The Feed Pawl Tooth Stroke must be set to the pitch of the teeth. The teeth are indexed by means of an oscillating mechanism actuated by a Feed Cam. The amount of movement (oscillation) imparted by the cam is governed by the position of the Bearing along the slot of the Translator Arm.
Shifting the bearing (34) left (towards the cam), decreases the total movement (oscillation) while moving it right (away from cam) increases this movement.
The bearing (34) is secured to the Translator arm by a bolt (32), which in turn is adjusted along the Translator Arm with a 5mm screw thread (64) actuated with a 4mm Hex. Key. Loosening the bolt and turning the socket screw allows accurate adjustments to the bearing position to be achieved. A good starting point is to have the picker return half way (50 to 60%) into the next tooth. For example, a 25mm (1”) pitch blade will require a total stroke of 38mm (1 1/2”) Increasing the tooth stroke allows the grinding wheel to go further down the tooth face before the picker contacts the next tooth and moves the blade along. This lengthens the face and gives a smaller radius to the throat (transition between the front face and the gullet).see Fig. 12