
B-65270EN/05 APPENDIX E.VELOCITY LIMIT VALUES IN SERVO SOFTWARE
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E VELOCITY LIMIT VALUES IN SERVO
SOFTWARE
(1) Overview
The feed axis velocity is subject to the feedrate limits that depend on
the internal processing of the system itself and that of the servo
software. These velocity limit values on the feed axis are explained
below.
NOTE
The permissible speeds listed below do not take
detector hardware limitations into account. For the
maximum permissible speed of a detector itself,
refer to the specifications of the detector.
(2) Velocity feedback (rotation speed) limit
The following limits apply to the rotation speed of motors according
to the type of motor speed detector.
Detector type Resolution
Allowable rotation
speed
αi Pulsecoder
2
20
, 2
21
pulse/rev 7500min
-1
HEIDENHAIN RCN220 2
20
pulse/rev 7500min
-1
HEIDENHAIN RCN223, 723 2
23
pulse/rev 937min
-1
Even if any of the above detectors is used as a position detector, the
same speed limits as those given above apply as the speed limits on
the detector.
* Limit values related to linear motors
If a linear motor is used, its speed detector is a linear scale. So, a
velocity rather than a rotation speed is involved, but the same
limits as stated above are applied.
Detector type Resolution Allowable speed
HEIDENHAIN LS486 (incremental)
with high-resolution serial output circuit
20/512 µm/pulse 300m/min
Sony BS75A (incremental)
with high-resolution serial output circuit
0.1379/512
µm/pulse
2.1m/min
HEIDENHAIN LC191F (absolute) 0.1 µm/pulse 786m/min
HEIDENHAIN LC491F (absolute) 0.05 µm/pulse 393m/min