Programming Commands U511 User’s Manual
5-92 Aerotech, Inc. Version 1.1
5.5.83. VELOCITY
The VELOCITY command is used when performing contour type motion to blend
consecutive motions into one continuous path. It is a modal command and as such will
remain in effect until turned OFF.
The UNIDEX 511 has two methods of blending moves together (contour modes).
Contour mode 0 (CM0) blends the deceleration of one move with the acceleration of the
next move. This mode is best for long moves if total move time is greater than twice the
ramp time. Contour mode 1 (CM1) ramps on the first G8 move and the last. It should be
used for short moves if the move time is less than twice the ramp time.
SYNTAX:
VELOCITY on|off
G8
G9
on (G8) Enables Velocity Profiling.
off (G9) Disables Velocity Profiling.
EXAMPLES:
G8 G1 X100 F100 ;Enables velocity profiling
G2 X0 Y20 C0,10 F200 ;Blends linear motion to produce this circular motion at
;specified feedrate
G9 G1 X-100 F100 ;Blends linear motion, disables velocity profiling at the end
;of this move
VELOCITY ON ;Does same thing as above
G1 X100 F100 ;
G2 X0 Y20 C0,10 F200 ;
VELOCITY OFF ;
G1 X-100 F100 ;
The last contour move in velocity profiling must include a VELOCITY OFF (G9)
command.
Related commands
INDEX, LINEAR, CW_CIRCLE, CCW_CIRCLE
IMPORTANT
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