Feed rate control method and apparatus in numerical control syst

Details Feed rate control method and apparatus in numerical control syst Feed rate control method and apparatus in numerical control syst

1995-08-03

1996-06-18

Envall, Jr., Roy N.

Boots, shoes, and leggings

364474290, 318571000, G05B 19416

Patent

active

055285066

ABSTRACT:
The tolerable maximum feed rate Fd is calculated in real time during operation based on the tolerable minimum moving time Ta to be determined by the data interpretation and the moving distance L of each machining block. If the command feed rate Fc exceeds the tolerable maximum feed rate Fd, the actual feed rate for the block is set to the tolerable maximum feed rate Fd, thereby realizing smooth deceleration and preventing mechanical shock of the machine tool and reduction in machining accuracy. Required time for each processing element is determined in advance, the sum of processing times corresponding each element is calculated by judging the processing mode element contained in machining for each block. Then, the feed rate is controlled by determining the tolerable minimum moving time for each block based on the calculated sum of processing times.

REFERENCES:
patent: 4543625 (1985-09-01), Nozawa et al.
patent: 4894594 (1990-01-01), Kawamura et al.
patent: 5200680 (1993-04-01), Sasaki et al.

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