MHT258a (Engl.)5-16
■ Parameter setting
To allocate the position control to the control input terminal, set (37) to the system para. Set (27) for the pulse train ratio 1, and (28) for the
pulse train ratio 2. If these signals are not allocated to the control input terminals, these signals are deemed "always off."
■ Related items
・Pulse correctionα, Pulse correction β
At factory setting, the motor rotates by the move quantity per encoder one pulse in response to one pulse of pulse train input.
In standard encoder, one rotation of motor shaft corresponds to 65536 pulses. Motor rotational quantity in response to one pulse of pulse
train input can be changed.
Basic parameter 91, 92
Para. Name Setting range Initial value Change
91 Command pulse correction α 1 to 32767 (in increments of 1) 8 Always
92 Command pulse correction β 1 to 32767 (in increments of 1) 1 Always
Move amount of mechanical equipment system per 1 pulse of pulse train input can be converted to unit quantity.
*Unit quantity is any value of 1/1, 1/10 or 1/100.
Pulse correction value can be calculated by using move amount and unit quantity of mechanical equipment system per one rotation of
motor.
【Calculation example】
Linear positioning of 10mm lead screw to incremental encoder (required unit quantity is 1/100)
We have obtained the following values :
Command pulse correctionα : 8192
Command pulse correctionβ : 125
With the above setting, the mechanical equipment system can now be advanced by 0.01mm per one pulse of pulse train input.
If move amount of mechanical equipment system per one rotation includes π, it can be replaced with 355/113.
Frequency dividing output has no relation with command pulse correction. The output is according to the system para. 79 setting.
See 5.4.5 for details.
(Move amount of mechanical equipment system per one motor rotation) Command pulse correction
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