8-56
Drive Functions
MPH-02, MPB-02, MPD-02
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
act
corr
act,
x
x
=
x
act
:
uncorrected actual position value 1 or 2
x
act,corr
:
corrected actual position value 1 or 2
Fig. 8-33:
Actual position value for v(cmd) > standstill window (S-0-0124)
value
correction
x
x
act
corr
act,
+
=
x
act
:
uncorrected actual position value 1 or 2
x
act,corr
:
corrected actual position value 1 or 2
Fig. 8-34:
Actual position value for v(cmd) < (-)standstill window (S-0-0124)
0/+1
S-0-0051/53, Pos. feedb. 1/2
value
S-0-0058, Reversal clear.
pos. cmd. value difference or
velocity command value
S-0-0124, Standstill window
S-0-0051/53, Pos. feedb.
1/2 value (corrected)
Fig. 8-35:
Block diagram for backlash on reversal correction
The following procedure is recommended for determining the value for
parameter
S-0-0058, Reversal clearance
:
•
by means of jog mode move axis in positive direction
•
place dial gauge at appropriate spot of mechanical axis system and
set it to zero
•
jog axis in negative direction until change in pointer deflection of dial
gauge is visible
The reversal clearance then is determined according to the following
calculation:
gauge
dial
control
X
X
clearance
reversal
∆
−
∆
=
∆
X
control
:
distance traveled from zero position of dial gauge according to
control display
∆
X
dial gauge
: distance traveled according to dial gauge referring to its zero
position
Fig. 8-36:
Determining the input value for S-0-0058
Determining the Reversal
Clearance
Courtesy
of
CMA/Flodyne/Hydradyne
▪
Motion
Control
▪
Hydraulic
▪
Pneumatic
▪
Electrical
▪
Mechanical
▪
(800)
426-5480
▪
www.cmafh.com