Patent ID: 6442859
Filing Date: 2002-09-03
Classification: B22F,B30B

Abstract:
A method for determining the position of a punch with respect to a die in a powder press comprising the following steps:storing a reference measure in a computer corresponding to a predetermined relatively small distance of a punch to one of an upper edge and a lower edge of a die, storing a reference offset in the computer corresponding to a number of pulses counted from an incremental path sensor actuated by the punch on raising the punch from the reference measure to an index pulse, measuring a position of the punch above the reference using an absolute path sensor which evaluates the path of an adjusting piston for the punch and whose readings are inputted into the computer and inputting the pulses of the incremental path sensor into the computer as soon as the actual position of the punch is equal or smaller than the sum of the reference offset and the reference measure.