Patent ID: 8061171
Filing Date: 2011-11-22
Classification: H01F,H02K,Y10T

Abstract:
1. A punch and wind machine for producing a slotted wound core, said punch and wind machine comprising: a punch arrangement arranged to punch apertures in a length of material; a mandrel for receiving the punched material, said mandrel rotated to roll the punched material around said mandrel to form the core, said mandrel positioned a fixed distance from said punch arrangement throughout winding of the core; a roll measuring sensor for measuring a dimension of the core on said mandrel; and a controller configured to determine an amount by which said mandrel is to be rotated after each operation of said punch arrangement based at least partially on the measured dimension of the core on said mandrel so that selected apertures punched in the length of material align with one another when the material is rolled onto said mandrel whereby the aligned apertures form respective slots of a desired configuration in the core.