Discussion
The axis of the plate cam blank and the end mill spindle should always remain
Answer: B
They should remain parallel to each other.
A plate cam is milled on a vertical milling machine with the cam blank on a dividing head. The dividing head spindle and the vertical head spindle are tilted to the same angle, keeping the axis of the blank parallel to the axis of the end mill. As the blank is rotated and fed, the end mill then cuts the cam profile square across the blank's face, and the angle of tilt sets the lead (rise) of the cam.
If the axes were inclined to each other the cutter would cut the profile at a slant. 'Opposite' and 'vertical and inclined' do not describe a fixed geometric relationship at all.
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