Newport MM4006, User Manual

Page: 73 / 411

MM4006 L o c a l Mode
Periodicity
This mode enables to display periodically (for example 0 to 360") for cer-
tain of rotary mechanical families (default, RV, (M-)URM).
Press the U P k e y to advance to the next parameter. Press MODIFY and
then the CHANGE k e y to select Y E S o r N O . To accept this entry,
press the VALID k e y . If periodicity is Y E S , enter the displacement
period with the numeric keypad and then press the VALID k e y to accept
this value. Press Q U I T t w o times and then t h e Y E S k e y t o save
changes.
NOTE
Processing of an axis infinite movement is possible only if a periodicity
has been defined, and only for rotary stages.
Axis Setup MODIFY ' M O D I F Y CHANGE V A L I D
VALID f j l l n L
QUIT Y E S Q U I T
CD — S e t periodical display mode.
Control Loop
The MM4006 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 MM4006 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 MODIFY key to modi-
fy the current setting. Press the CHANGE key to select a different loop type.
Press VALID t o accept the new loop type and return t o the previous
menu.
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ED110181En1020 — 03/03
2.30 N e w p O r t .