Question

CONTROL OF PLANER MACHINE Work piece Planing tool Table Rack 1LS 2LS Pinion Motor Schematic diagram for a Planer machine Various control requirements for the machine are as follows: The motor is to be started manually by pressing START-push button. Once the motor starts it is reversed automatically at the end of right or left stroke by limit switches 2LS and 1LS 2 Selection of initial direction of travel should be possible through right and left 3 There should be a delay in starting the motor in left to right stroke so as to allow the 4 The machine should stop on pressing of STOP-push button or on over-load tripping 5Interlocking of coolant pump motor (running) should be provided as a pre-condition traverse push button, PBn and PBL. tool to get the feed for a fresh cut on the job of motor. for starting of the machine. Draw The System Ladder Circuit

Answer 1

01 W 20 13 14 15 16 17 18 1 6789 10 11 12 20 21 22 23 24 25 26 27 28 29 30 31 209 STOPET 125.6 RET