YASKAWA MOTIONPACK-110 Descriptive Information page 106

(Example 1) Table drive by using ball screw (X-axis direction)
Specifications:
• Ball screw pitch P = 6 (mm/rev)
• Deceleration ratio R - _ - 2
• Minimum position command unit U = 0.001 (ram/pulse)
• Pulse generator output: Undefined
Change expression (_) and calculate back pulse generator output so that B/A results in 1.00.
___ _ B ............... Expression (_)
fp_- lx x x A
_ 1 x 6 x+ x 1.00 4 0.001
= 750 (pulses/rev)
Therefore, select a pulse generator conforming to the 750 pulses/rev specifications.
Then, set "16777216" in X-axis position command parameters B/A (#1557), A/B (#1558).
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(Example 2) Assuming that deceleration ratio R = N _/Nm = --5- in example 1,
1 x 6 x 1
f_c = T 0.00-----T --_ x 1.00
5
= 1071.428 ... (pulses/rev)
Therefore, fPc results in an incomplete value. Select an already existing pulse generator
which generates greater than 1071.4 pulses/rev.
For example, if with 2000 pulses/rev, again B/A is calculated from expression (_),
B _ 2000×4 _ 28
A
6 x _
15
0.001 7
A _ 15
B 28
If the last parameter (X-axis) is calculated,
B parameter - 28 x16777216 = I313174691.87
A 15 l
This value is set in parameter #1557.
A parameter- 15 x16777216 = [ 8987794].286
T ---_-
t
This value is set in parameter #1558.
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