PMAC Quick Reference Guide
52
Motion Programs
In order to reach the desired position, since the move involves a change in direction and stop, simply
place a
DWELL0
command between moves. This command will disable blending for that particular
move:
TA100
TM250
X10
DWELL0
X-10
4. Since the value of TA determines the minimum time in which a programmed move can be executed,
it could limit the maximum move velocity and therefore the programmed feedrate might not be
reached. This is seen in triangular velocity profile moves types, especially when a sequence of short
distance moves is programmed.
Example:
close
delete gather
undefine all
&1
#1->2000X
I190=1000
OPEN PROG 1 CLEAR
LINEAR
; Linear mode
INC ;
Incremental
mode
TA100
; Acceleration time is 100 msec, TA
1
TS0
; No S-curve component
F40
; Feedrate is 40 length_units / second
X3
;
msec
75
40
3000
40
I190
.
3
TM
=
=
=
CLOSE
Since the calculated TM for the given feedrate is 75 msec and the programmed TA for this move is 100
msec, the TM used will be 100 msec instead. This yields the following feedrate value instead of the
programmed one:
second
distance
of
units
30
100
3000
100
I190
.
3
F
=
=
=
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