EDH0162En1040 – 06/99
2.20
MM4005
Local Mode
2.2.2.8
Control Loop
The MM4005 controller has the capability to operate both DC and stepper
motors in closed loop or open loop configurations. This is an important
feature, especially for the stepper motors. As described in the tutorial sec-
tion, when operating a stepper motor in a mini- or micro-stepping mode,
the actual position can vary a few steps when under load. If the servo loop
in closed with an encoder, position errors are corrected both during the
motion and at stop.
All stages offered with the MM4005 are equipped with an encoder, includ-
ing those driven by a stepper motor. The recommendation is to always use
the closed-loop mode.
NOTE
It is not recommended to operate a DC motor in open loop. This mode is
used only at the factory to output a constant DC voltage to the motor dri-
ver for testing and calibration purposes.
If you need to change the control loop type, press the
key to modi-
fy the current setting. Press the
key to select a different loop type.
Press
to accept the new loop type and return to the previous
menu.
Press the
key to advance to the next parameter.
→
→
→
→
→
→
→
→
→
2.2.2.9
Periodicity
This mode enables to display periodically (for example 0 to 360°) for cer-
tains of rotary mechanical families (default, RTM, URM).
Press the
key to advance to the next parameter. Press
and
then the
key to select
or
. To accept this entry,
press the
key. If periodicity is
, enter the displacement
period with the numeric keypad and then press the
key to accept
this value. Press
two times and then the
key to save
changes.
NOTE
Processing of an axis infinite movement is possible only if a periodicity
has been defined, and only for rotary stages.
→
→
→
→
→
→
→
→
→
→
→
CD
— Set periodical display mode.
QUIT
YES
QUIT
QUIT
VALID
1
4
7
2
5
8
3
6
9
.
-
0
Axis 1
Axis 2
Axis 3
Axis 4
JOG
VALID
CHANGE
MODIFY
UP
MODIFY
Axis Setup
1
4
7
2
5
8
3
6
9
.
-
0
Axis 1
Axis 2
Axis 3
Axis 4
JOG
M A N U
P R O G .
1 :
2 :
3 :
4 :
2
1
2 . 3 4
m
m
n
U
c o n
5 6
3
-
. 3 5
m
m
6
n e c t
L
A
H O M E
S
t
e
a c t i o n
l e c
M O V E
. 3 4 5
D e g
e d
YES
QUIT
VALID
YES
VALID
NO
YES
CHANGE
MODIFY
UP
QUIT
YES
QUIT
QUIT
VALID
CHANGE
MODIFY
UP
MODIFY
Axis Setup
1
4
7
2
5
8
3
6
9
.
-
0
Axis 1
Axis 2
Axis 3
Axis 4
JOG
M A N U
P R O G .
1 :
2 :
3 :
4 :
2
1
2 . 3 4
m
m
n
U
c o n
5 6
3
-
. 3 5
m
m
6
n e c t
L
A
H O M E
S
t
e
a c t i o n
l e c
M O V E
. 3 4 5
D e g
e d
UP
VALID
CHANGE
MODIFY
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