— 8-15 —
8.4. Setting Filters (Adjustment Level 2)
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When positioning, the Motor may resonate mechanically and generate a noise of certain
frequency. Using Megathrust Motor’s software “low-pass filters” (Parameter FP and FS), the
noise can be reduced.
The unit of parameters of FP and FS is cycles / second (Hz).
à
If low frequency less than 100Hz is set to parameters “FP” and “FS”, hunting or
unstable positioning may occur.
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Before using filters, make sure that all adjustments of gain (VG) and integrator frequency (VI)
are completed.
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Use same demonstration program (SA/AJ) for adjusting filters. Follow the procedures a ~ j in
“8.2.4. Trial Running (Adjustment Level 1)”.
(1)
Start “FP” adjusting program.
[+],[-],[ENT]
444( 333)
STEP1
_FP500
P
/
F
J
ENT
A
(i)
(v)
(ii)
(iii)
(iv)
The message is displayed as shown below. Press plus (+) or minus (key) to change “FP” value.
(The display shown below is an example. Those values shall be set to the conditions for actual
use.)
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Explanation of the messages
(i)
Key function
and
-
+
SHIFT
: Pressing key one time increases 10 resolution of “FP”.
-
+
: Pressing key one time decreases 10 resolution of “FP”.
ENT
: Store “FP” value in the memory and completes the
(ii)
Indicates present “FP” value.
(iii)
Indicates “FP” value changed by pressing plus (+) or minus (-) key.
(iv)
Response index number : The lower number denotes better response.
(v)
Positioning index number : The lower number denotes quicker positioning.
positioning.
Note: Changing “FP” step (3).
If you want to change the resolution of step, press space key or back space key.
Space key
: Changes the step to 1/10 of present resolution.
(Pressing twice makes 1/100.)
Back space key : Changes the step to 10 times of present resolution.
(Pressing twice makes 100 times.)
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