IEMCA BOSS 542 CNC, Руководство по эксплуатации и техническому обслуживанию, Страница: 136 / 167

31
3
OPERATION INFORMATION
302.035
b) Ejection through the bar-pusher.
Align point F (max. bar-pusher feeding point,
parame-
ter 28 ) with the collet.
Description of phases:
– the lathe receives the “BAR END” signal from the
bar feeder, machines the last workpiece, shifts into
the subprogram (the catch moves away) and sends
the “OPEN COLLET” and “ BAR CHANGE-OVER”
signals;
– the bar pusher reaches point
F
and ejects the bar
remnant, thus allowing the bar feeder to change the
bar.
3 - “Bar change-over advance”
Allows the bar feeder to change the bar, while lathe is starting to machine the last workpiece. The bar change-over is
thus advanced, without waiting until the last workpiece has been machined or the bar-pusher has reached point
F . The
remnant is ejected with the new bar.
Necessary conditions
– Input 449 must be enabled, through the following options:
- connect common wire 251 to wire 449 (see the bar feeder interfacing diagram);
- fit a switch (S59) controlling the bar change-over cycle into the electric control panel (see the electric diagram);
- use the lathe “BAR CHANGE-OVER ADVANCE” signal (if supplied).
Description of phases:
– the lathe receives the “BAR END” signal from the bar feeder, thus activating input 449;
– the bar feeder pusher strokes back, inserts the new bar into the guide and waits for the “OPEN COLLET” and
“BAR CHANGE-OVER” signals;
– as soon as lathe has machined the last workpiece, it shifts into the subprogram (the bar catch moves away) and
sends the “OPEN COLLET” and “BAR CHANGE-OVER” signals;
– the new bar ejects the bar remnant and moves to the facing position.
Max. “OPEN COLLET” time.
Should the feeding control (“OPEN COLLET” signal from lathe) fail to be de-
sactivated within the time previously entered, the bar feeder stops in an
“EMERGENCY”.
Max. time allowed to machine a workpiece.
Should machining exceed the time previously set, the bar feeder stops in an “EMERGENCY”
F
35.010 Ec.0
F
21
Phase Default
0 sec.
machining : > ( s e c )
n o . 2 1 o p e n c o l l e t t i m e o u t
22
Phase Default
0 sec.
machining : > ( s e c )
n o . 2 2 w o r k p i e c e t i m e o u t