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Mitsubishi Electric RD77MS2 User Manual Page 228

Melsec iq-r simple motion module.
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  • Contents

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■For "Ball screw" + "Reduction gear"
When the ball screw pitch is 10 mm, the motor is the HG-KR (4194304 pulses/rev) and the reduction ratio of the reduction
gear is 9/44.
M
Reduction ratio 9/44
First, find how many millimeters the load (machine) will travel (S) when the motor turns one revolution (AP).
AP (Number of pulses per rotation)
ΔS (Movement amount per rotation)
Substitute this for the above expression (1).
At this time, make calculation with the reduction ratio 9/44 remaining as a fraction.
4194304 [pulse]
AP
=
10000.0 [μm] × 9/44
ΔS
4194304 × 44
=
10000.0 × 9
184549376
=
90000.0
23068672
=
=
11250.0
11250.0(AL) × 1(AM)
23068672(AP)
=
1125.0(AL) × 10(AM)
Thus, AP, AL and AM to be set are as follows.
Setting value
Setting item
AP = 23068672
[Pr.2]
AL = 11250.0
[Pr.3]
AM = 1
[Pr.4]
or
Setting value
Setting item
AP = 23068672
[Pr.2]
AL = 1125.0
[Pr.3]
AM = 10
[Pr.4]
*1 These two examples of settings are only examples. There are settings other than these examples.
■When "pulse" is set as the control unit
When using pulse as the control unit, set the electronic gear as follows.
AP = "Number of pulses per rotation"
AL = "Movement amount per rotation"
AM = 1
Ex.
When the motor is the HG-KR (4194304 pulses/rev)
Setting value
Setting item
AP = 4194304
[Pr.2]
AL = 4194304
[Pr.3]
AM = 1
[Pr.4]
8 CONTROL SUB FUNCTIONS
8.3 Functions for Compensating the Control
= 4194304 [pulse]
= Ball screw pitch × Reduction ratio
= 10 [mm] × 9/44
= 10000.0 [μm] × 9/44
23068672(AP)
When the control unit is
"mm", the minimum
command unit is 0.1 m.

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