Lika Modbus LDT10, Руководство пользователя

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LDT10
Backlash, sometimes called lash or play, is clearance or lost motion in a
mechanism caused by gaps between the parts. It can be defined as "the
maximum distance or angle through which any part of a mechanical system
may be moved in one direction without applying appreciable force or motion to
the next part in mechanical sequence", and is a mechanical form of deadband.
B
acklash results in inaccurate calculation from the small error introduced at the
change of direction and thus in wrong target achievement. The backlash
compensation allows the system to automatically move the extra distance
required to take up the slack when the axle changes direction so reaching the
target position properly.
As shown in the figure below, if you set
Backlash direction
=
POSITIVE
, the
backlash compensation is performed only when the axle moves toward positive
target T1, it is not performed when the axle moves toward negative target T2 (P
marks the starting position of the axle). The extra distance or gap that the travel
has to be compensated for is set next to the
Backlash step length
item.
As shown in the figure below, if you set Backlash direction = NEGATIVE , the
backlash compensation is performed only when the axle moves toward negative
target T2, it is not performed when the axle moves toward positive target T1 (P
marks the starting position of the axle). The extra distance or gap that the travel
has to be compensated for is set next to the
Backlash step length
item.
MAN LDT10 E 1.2 HMI interface 33 of 44