39
4 Adjustment
4
CCW
CW
Ex.1
Ex.2
Offset
Gain
4-8 Motor Balance Adjustment
Servo Motor feeds back to the CPU the actual rotation corresponds to the instruction.
Motor tried to follow the instruction from the CPU.
Difference between the actual rotation and the
instruction could be adjusted with the Motor
Balance (GAIN) Adjustment.
- If the difference is small (= GAIN is small),
motor becomes very sensitive. As a result, it
vibrates.
- If the difference is big (= GAIN is big), motor
becomes dull to the instruction. And as a result,
cutting quality will be damaged.
Motor Balance (OFFSET) Adjustment is used to
adjust the GAIN for CW and CCW directions to
be equal.
- Ex.1 in the figure shows that both the OFFSET
and the GAIN is adjusted in both CW and CCW
directions.
- Ex.2 shows that the GAIN is adjusted but the
OFFSET is shifted. Therefore, the GAIN will be
big in CCW direction and small in CW direction.
As a result, motor becomes dull in CCW
direction and sensitive in CW direction causing
problems.
1
Put all three PINCH ROLLERS in UP position.
Then remove the FRONT APRON.
Command
Feedback
Servo Motor
CPU
PINCH ROLLER
FRONT APRON
PINCH ROLLER
PINCH ROLLER
