Abstract: A multiple-feed circular knitting machine has an upright-axis needle cylinder coaxially surrounded by an annular base plate and a sector-support plate supported thereon for axial sliding movement relative thereto and in turn supporting sectors of a cam-support ring bearing cams which control the axial movements of needles of the needle cylinder, the sector-support plate being supported by grub screws projecting below the plate and bearing on respective inclined upper faces of equal slope in the same circumferential direction of wedge-shaped blocks fixed to a setting ring carried on the base plate, and the machine having a graduated control which operates a pinion meshed with peripheral teeth of the setting ring to rotate the ring in either sense relative to the sector-support and base plates to make the grub screws ride up or down the respective inclined faces to raise or lower the cams supported from the sector-support plate by the same amount simultaneously to adjust the vertical movements of the needles.