Spiral | Problems on Spiral
Spiral: Important approach for construction spiral... Find total angular and total linear displacement and divide both into the same number of equal parts.here some problems on spiral to draw one and two convolution spirals. 1 ] Draw a spiral of one convolution. Take a radius as 40 mm. Solution Steps With a 40 mm radius draw a circle and divide it into 8 parts. Name those 1, 2, 3, up to 8. Similarly divided line OP also in 8 parts and name those 1, 2, 3 up to 8.( because here it is one convolution we divide OP in same parts as we divide a circle, here it is 8 so we divide OP into 8 parts, if you divide the circle into 12 parts then for one convolution we divide radius(OP) of the circle into 12 parts) Take O1 distance from the OP line and draw an arc up to the O1 radius vector. Name the Point P1. Similarly mark points P2, P3, P4 up to P8. And join those in a smooth curve. It is a SPIRAL of one convolution. 2 ] Point P is 80 mm from point O. It starts moving towards O an...