Electro Cam PS-6144 Series - Manual (Page 45)

3-17 Programming
Offset (cont’d)
Offset Programming To change the offset for an output group in Mode 0, 3, 4, or 5, first select the group by
moving the cursor to GRP. Use INC or DEC, or the numeric keypad and ENT to select
the group.
Offset can be programmed in two ways:
Direct Entry—Enter the offset directly by moving the cursor to ABS and entering the
offset value on the numeric keypad, followed by ENT.
Group Position—Jog the machine to a position that corresponds to the desired group
position, move the cursor to POS, and enter the group position using the numeric key-
pad, followed by ENT. For example, jog the machine to a point where the group position
should be zero, then press “0” ENT while the cursor is at POS.
• For standard PS-6144 controllers using Electro Cam resolvers, the ABS value will
directly show the relationship between the group position and machine 0 (shaft posi-
tion) in scale factor increments. For example, suppose that SHAFT POSITION is set
to machine 0 and SCALE FACTOR is set to 360. If the ABS of a group is 20, its
position will always be 20 dgrees ahead of the machine position.
• If groups have been programmed with their own offsets, changing SHAFT POSITION
will change all of the group positions at once.
It is usually best to set SHAFT POSITION to the desired zero position in the
machine cycle before programming individual group offsets.
• If groups have been programmed with their own offsets, changing GRP POS DISP to
ONE will change ABS for all groups to the value programmed for Group 1.
Programming Preset To change the preset for an output group in Mode 1 or 2, first select the group by
moving the cursor to GRP. Use INC or DEC, or the numeric keypad and ENT to select
the group. Move the cursor to PRE and enter the preset value, followed by ENT. Preset
is programmed in scale factor units.
• The preset value is stored in the controller on power down. However, the last group
position is not. On power up, the group position will be the same as SHAFT POSI-
TION. When the group’s input terminal is energized, then the group position will reset
to the preset value.
See Also SHAFT POSITION
GRP POS DISP
OUTPUT GROUPS
Section 5 for details on Output Grouping & Modes
C AU T I O N