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(b) Procedure
1.
Set the "command movement amount (L)", and carry out positioning.
(Set the "movement amount per pulse (A)" according to List of Parameters ( Page 118, Section 5.2).)
2.
After positioning, measure the "actual movement amount (L')".
3.
Calculate the "error compensation amount".
4.
Calculate the post-compensation "[Pr.2] No. of pulses per rotation (Ap')", "[Pr.3] Movement
amount per rotation (Al')", and "[Pr.4] Unit magnification (Am')" from the "post-compensation
movement amount per pulse (A')".
(Adjust with Am' so that Al' and Ap' do not exceed the setting range.)
(Examples)
Item
Movement amount per rotation: 5000 (m/rev)
Condition
No. of pulses per rotation: 12000 (pulse/rev)
Unit magnification: 1
Command movement amount: 100mm
Positioning result
Actual movement amount: 101mm
Compensation value
Movement amount per rotation: 101 (m/rev) (set in [Pr.3])
No. of pulses per rotation: 240 (pulse/rev) (set in [Pr.2])
Unit magnification: 1 (set in [Pr.4])
5.
Set the post-compensation "[Pr.2] No. of pulses per rotation (Ap')", "[Pr.3] Movement amount per
rotation (Al')", and "[Pr.4] Unit magnification (Am')" in the parameters, and write them to the LD75.
The set data is made valid on the rising edge (OFF to ON) of the PLC READY signal [Y0].
Setting item
[Pr.2]
No. of pulses per rotation
[Pr.3]
Movement amount per rotation
[Pr.4]
Unit magnification
Refer to Page 118, Section 5.2 for the information on detail settings.
Error compensation amount =
A' = A ×
Error compensation amount
Al
× Am ×
=
Ap
Al'
× Am'
=
Ap'
3
3
AL'
5×10
101×10
=
×
3
AP'
12000
100×10
Setting value
CHAPTER 12 CONTROL SUB FUNCTIONS
L'
L
L'
L
Setting
5050
101
=
=
12000
240
Setting details
Ap'
Set the post-compensation value.
Al'
Set the post-compensation value.
Am'
Set the post-compensation value.
12
Pre-compensation
value
Ap
Al
Am
523
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Troubleshooting
