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7. Description of Registers
R01 - Slow speed distance X/Y
Distance to the target position at which the controller switches from high speed to slow
speed. The output high speed will be switched off.
R02 - Creep speed distance X/Y
Distance to the target position at which the controller switches from slow to creep speed
R03 - Stop offset distance X/Y
The over run distance can be programmed to compensate for distance from the switch-
off point of the motor to standstill. For exact positioning, the over run distance should be
very small (0.0… 0.5 mm). Therefore the mechanical friction should be steady and the
creep speed should be very slow.
During commissioning, first set R12 to zero (to eliminate Tolerance window blanking),
then set the value of
R03 to 0.0 and execute a number of moves in both directions.
Note
the average overrun distance and then set
R03 to that value. Then set R12 to suit.
Note: Stop offset is only functional when R8/1 = 1
R04 - Backlash overrun X/Y
To correct for screw or pinion backlash, the target position should be approached
from one direction only. In positive direction therefore, the target position will be
overrun by the value of
R4 and drive back to the target position with creep speed,
after the time delay of
R10.
R05 - Retract distance X/Y
There are different modes available in the P8822, selectable by Register R18/2.
If R18/2 = 0 Retract Position to the actual value + R5
Whilst the input
St3 Pin 7 (Y- Axis) resp. 8 (X- Axis) is activated, the P8822 will move
to the
retract position. With deactivating the input, the controller returns to the basic
position (Value 0).
If R18/2 = 1
Retract Position to the value of R5
When input St3/8 is activated, the axis moves to position as set in
R5, but will not re-
turn to original position on release of input. (Value 1)
If R18/2 = 2
Retract with backlash dwell time of R10
R06 - Tool offset compensation X/Y
This Register can be accessed without security code. When moving in incremental mode,
it is often the case that the subsequent function is a cut, that removes part of the mate-
rial. Thus to cut the correct pre-set lengths, it is necessary to move the desired distance
plus the
tool offset. This feature is active in incremental mode only.
R07 - Datum/Reference X/Y
This Register can be accessed security code. The Datum value is stored in this Register.
The value is used in different ways, in accordance with setting of
P8/3. Input St3 Pin 7
(Y-Axis) resp. Pin 8 (X- Axis) initiates loading.