MPH-02, MPB-02, MPD-02
Motor, Mechanical Axis System, Measuring Systems
5-83
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
linear motor
gear
encoder1
motor enc.
(encoder1)
rotary motor
DF0047v1.fh7
P-0-0121
P-0-0122
motor
S-0-0115
S-0-0121
S-0-0122
motor encoder
(encoder1)
ext. encoder
(encoder2)
ext. encoder
(encoder2)
ext. enc.
(encoder2)
P-0-0124
P-0-0125
P-0-0124
P-0-0125
gear
encoder2
gear
encoder2
rotary
encoder
rotary
scaling
load gear
rotary
load
load gear
feed spindle
load gear
feed spindle
linear
load
linear
load
linear
scaling
linear
encoder
S-0-0051
S-0-0076
S-0-0121
S-0-0122
S-0-0121
S-0-0122
S-0-0123
S-0-0123
Fig. 5-96:
Mechanical transfer elements between motor, encoders and load
Note:
For linear motors the motor reference is the same as the load
reference because the point where the force is input and point
where the load takes effect are identical. There aren’t any
mechanical transfer elements!
The polarity of the position, velocity and torque/force data can be changed
from positive to negative polarity in the following parameters:
•
S-0-0055, Position polarities
•
S-0-0043, Velocity polarity parameter
•
S-0-0085, Torque/force polarity parameter
Depending on the mounting situation (especially of kit motors and their
respective motor encoder or external encoder), this allows determining
the appropriate polarity of the respective data for the machine axis.
Via the respective bit of parameter
S-0-0076, Position data scaling type
it is possible to select, for the position data format, between
•
absolute format and
•
modulo
format.
If the position data of an axis with infinite travel range (e.g. rotary axis,
spindle etc.) were processed in absolute format, the axis would risk to
move beyond the value range of the position data. This would lead to
invalid position data; operating modes with position control would not be
safe to operate.
The value range for modulo format is limited, only position data between
the value 0.00... and a maximum value to be determined in parameter
S-0-0103, Modulo value
are possible.
When the measured actual position value exceeds the value range or
falls below it, the actual position value displayed in S-0-0051/S-0-0053
behaves unsteadily, i.e. it changes by the absolute value of the modulo
value range in such a way that the actual position value displayed always
remains within the modulo value range.
Polarity
Modulo Scaling
Courtesy
of
CMA/Flodyne/Hydradyne
▪
Motion
Control
▪
Hydraulic
▪
Pneumatic
▪
Electrical
▪
Mechanical
▪
(800)
426-5480
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www.cmafh.com