Mitsubishi Electric MELSEC iQ-F Series FX5 User Manual page 375

[Pr.2] No. of pulses per rotation (16 bits) (Ap)
Set the number of pulses required for a rotation of the motor shaft with 16 bits. When [Pr.62] Electronic gear selection is set to
0: 16 bits, this area is valid.
If a Mitsubishi servo amplifier is used, set the value given as Resolution per rotation of the servomotor in the speed-position
detector specifications. (When Resolution per rotation of the servomotor of the Mitsubishi servo amplifier exceeds 65535
pulses, configure the setting referring to the Servo Amplifier Instruction Manual.)
• Number of pulses per rotation (Ap) = Resolution per rotation of the servomotor
■Buffer memory address
The following table shows the buffer memory address of this area.
Buffer memory name
[Pr.2] No. of pulses per rotation (16 bits) (Ap)
■Setting range
The setting range is 1 to 65535.
■Default value
The default value is 20000 for all the axes.
■Movement amount per pulse
In the positioning module, the parameters [Pr.2] to [Pr.4] define the movement amount per pulse when a pulse train is output.
(The following explains how to set the individual parameters when "0: mm" is selected for [Pr.1] Unit setting.)
The movement amount per pulse is given by the following calculation formula:
Movement per pulse (A) =
Item
[Pr.2] No. of pulses per rotation
[Pr.3] Movement amount per rotation
[Pr.4] Unit magnification
Movement amount per pulse
Due to the mechanical tolerance, the actual movement amount may differ slightly from the specified movement amount. The
error can be compensated by adjusting the value set in Movement amount per pulse. (Page 373 Movement amount per
pulse)
If the movement amount per pulse is less than 1, command frequency variations occur. Smaller values will
increase variations and may cause machine vibration. If the movement amount per pulse becomes less than
1, also use the electronic gear function of the drive unit and configure the setting so that the movement
amount per pulse is 1/500 or greater.
Axis 1
1
Al × Am
Ap
Axis 2
151
Symbol
Ap
Al
Am
A
17 DATA USED FOR POSITIONING CONTROL
17.3 Basic Setting
17
373