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English
3-4-2. Track
deviation
±2 mm
3-4-3. Scale unit and head unit
Scale surface
Head
θ
3
θ
1
θ
2
θ
1
θ
2
θ
3
PL25
±3° or less
±0.5° or less
±3° or less
PL60
±1° or less
±0.3° or less
±1° or less
3-4. Head unit and scale unit
Note
Make sure that the head and scale clearance remains within the
value given below.
If the head unit and scale unit touch one another or the clearance
is smaller than specifi ed, the system will not operate normally.
3-4-1. Head
clearance
Clearance
Head unit
Scale unit
Detection surface
Clearance
PL25 / SL110
1.5 mm or less
PL25 / SL130
PL60 / SL331
0.8 mm or less
