Mitsubishi Electric MELSEC-Q QD75M User Manual page 554

12 CONTROL SUB FUNCTIONS
(1) For "Ball screw" + "Reduction gear"
When the ball screw pitch is 10mm, the motor is the HC-MF (8192
PLS/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 (
the motor turns one revolution (AP).
•
AP(No. of pulses per rotation) = 8192
•
S
(Machine travel value per motor revolution)
Substitute this for the above expression (1).
At this time, make calculation with the reduction ratio 9/44 remaining as a
fraction.
8192
AP
=
10000.0 [ µ m] × 9/44
S
8192 × 44
=
10000.0 × 9
360448
=
90000.0
45056
=
11250.0
45056 (AP)
=
1125.0 (AL) × 10 (AM)
Thus, AP, AL and AM to be set are as follows.
AP = 45056 ...... Pr.2
AL = 11250.0 ... Pr.3
AM = 1 ............ Pr.4
Note): These two examples of settings are only examples. There are
settings other than these examples.)
12 - 15
Machine
×
= Ball screw pitch
×
= 10 [mm] 9/44
µ
×
= 10000.0 [ m] 9/44
45056 (AP)
=
11250.0 (AL) × 1 (AM)
AP = 45056 .... Pr.2
AL = 1125.0 ... Pr.3
or
AM = 10 ......... Pr.4
MELSEC-Q
S
) when
Reduction ratio