
A-79364E
Title
Draw
No.
Ed. Date Design Description
Date Jan.07.’04 Design. Apprv.
10/13
Page
FANUC Series 30i-MODEL A
Linear scale with distance-coded
reference marks
serial
When a reference point is located in plus side of a scale zero, set a plus value
to this parameter. And a reference point is located in minus side, set a minus
value.
[Example of parameter setting]
When IS-B and millimeter machine and using a scale figured below:
Mark1 Mark2
Mark1 Mark2
Scale zero
Scale end
Reference point
…….
Mark1=Mark2
41.8
8.2 42.0
8.0
PRM.1884 × 1,000,000,000 + PRM.1883
20.000 19.980 9.940 10.060
9.960
10.040 9.980 10.020
5.000 20.000mm
20.020mm -[9960/(20020-20000)*20000+5000] = -9965000
Mark1
Mark2 Mark1 Mark2 Mark1
Mark1 Mark2
Mark1
Mark1 Mark2 Mark1=Mark2
B
Scale zero
Plus direction Minus direction
Reference point
Parameter No.1883 (Reference position) = Position of point A+5.000
= (Distance of A to B) / ( Mark2 interval - Mark1 interval)
* Mark1 interval +5000
= 9960/ (20020 – 20000) * 20000+5000
= 9965000
= -9965000 (Reference point is located in minus side)