YASKAWA SGD7S series Product Manual page 65

4.4 Parameter Setting Procedure
4.4.3 Initial Parameter Settings
5.
Setting the Maximum Clearance Offset
Set Pn6F2 (Maximum Clearance Offset) to the maximum value for the clearance offset reference. If
the clearance offset reference is greater than the maximum clearance offset, the maximum clearance
offset is used.
To set the maximum clearance offset to 1.5 mm in a machine with a 24-bit encoder and a ball screw
pitch of 5 mm, calculate the maximum clearance offset in reference units as shown below.
For 1 reference unit to be 1 μm, the electronic gear ratio must be set as follows:
Electronic gear ratio = 2
Maximum clearance offset [reference units] = Number of encoder pulses [pulses/revolutions]/ball
screw pitch [mm] × Maximum clearance offset [mm] × (1/electronic gear ratio) = 2
16,777,216) = 1,500
Therefore, the setting of Pn6F2 is 1,500.
Pn6F2
6.
Setting the Minimum Clearance Offset
Set Pn6F4 (Minimum Clearance Offset) to the minimum value for the clearance offset reference. If the
clearance offset reference is less than the minimum clearance offset, the minimum clearance offset is
used.
Pn6F4
4-8
24
/5,000 = 16,777,216/5,000
 If Pn6F2 (Maximum Clearance Offset) is set to 0, clearance control is disabled. Set Pn6F2
within the measurable range (the range that maintains linearity) of the gap sensor.
If the maximum clearance offset is less than the minimum clearance offset in the setting, an
A.040 alarm (Parameter Setting Error) will occur.
Maximum Clearance Offset
Setting Range Setting Unit
0 to 16,777,216 1 reference unit
 If Pn6F4 (Minimum Clearance Offset) is set to 0, clearance control is disabled. Set Pn6F4
within the measurable range (the range that maintains linearity) of the gap sensor.
If the maximum clearance offset is less than the minimum clearance offset in the setting, an
A.040 alarm (Parameter Setting Error) will occur.
Minimum Clearance Offset
Setting Range Setting Unit
0 to 16,777,216 1 reference unit
CAUTION
Position
Default Setting When Enabled
0 Immediately
CAUTION
Position
Default Setting When Enabled
0 Immediately
24
/5 × 1.5 × (5,000/
Classifica-
tion
Setup
Classifica-
tion
Setup