2
III
INSTRUCTION
1. HOW TO FORM CIRCLES IN JUST TWO PASSES.- Length of material necessary to
form the desired size circle is the first consideration in circle forming. To determine
approximate length of material needed, use the formula C=πD.C is Circumference. π
equals 3.1417. D is Diameter. For example, to find the length of material needed(C or
Circumference) to form a circle 4’’ in diameter multiply 3.1417 by 4’’. Result –12.5667 is
the circumference of approximate length of material needed. Cut a few pieces of
material to this length for test forming. Material may have to be lengthened or shortened
depending upon results of the test forming run.
2. TO ADJUST ROLLER- for material thickness, loosen the thumb screw to the right of
the adjusting screws. Turn the adjusting screws to raise or lower the lower pinch roll.
Insert the material between the rolls from the front of the machine and set rolls so the
material fits tightly. Retighten the thumb screws and remove the material from between
the rolls.
3. NO EXACT FORMULA- can be followed when making this adjustment because
material “spring back” varies with the kind of material being formed. Only by test forming
several pieces can the correct adjustments be obtained. Rolls must be adjusted exactly
parallel or the material will spiral during the rolling process.
4. TO OPERATE ROLLER- after diameter adjustments have been made, insert material
from front of roller and turn operating handle in a clockwise direction until about half of
the material has passed through the rolls; if roller is power operated make sure that the
upper pinch roll is rotating in a counter clockwise direction. Then, while feeding material,
raise the idler roll. Continue turning until a half circle has been formed. It is important that
you operate the roller while engaging the cam lever. For if the cam lever is engaged
while the rolls are not turning, a noticeable flat spot or line will be formed across the
width of the material.
5. AFTER HALF CIRCLE- has been formed, reinsert the formed end of the material in to
the roller(as follows illustrated) and turn operating handle in a clockwise direction to form
a complete circle. If roller is power operated, turn switch in a position that allows the
upper pinch roll to rotate in a counter clockwise direction.
6. FRONT AND REAR ADJUSTMENT SCREWS- The four adjustment screws (two
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