
26
88
A-78710E
Edit
Apprv. Desig.
Sheet
Title
Draw
No.
Date
Design
Descri
tion
Date
FANUC Series 16i –MB, 18i –MB5
Tool Radius Compensation For 5-Axis
machining Specifications
Dec.01.2001
02 Mar.22.2002
T.Mochia All revision
H.Kouzai
Sheet
T.Mochida H.Kouzai
03 Mar.28.2003
MTanaka All revision H.kouzai
04 Aug.05.2003
T.Horie Intersection offset, G-code unification add. H.kouzai
05 Jun.02.2004 Intersection offset(tool rotation type, Mixed type)
・Compensation performed when θ is approximately 0°, 90°, or 180°
When the included angle θ between VMn+1 and VTn is regarded as 0°, 180°, or 90°,
the compensation vector is created in a different way. So, when creating a program,
note the following points:
(1) Setting a variation range for determining θ to be 0°, 180°, or 90°
When the included angle (θ) between the tool vector (VTn) and movement vector
(VMn+1) becomes approximately 0°, 180°, or 90°, the system regards θ as 0°,
180°, or 90°, respectively, then creates a compensation vector which is different
from the normal compensation vector. The variation range used for determining
θ to be 0°, 180°, and 90° is set in parameter No. 19631. For example, let the
angle set in this parameter be ∆θ. Then, the system regards θ as follows:
(1) If 0 ≤ θ ≤ ∆θ , θ is regarded as 0°.
θ
∆θ
V
Tn
V
Mn+1
Fig.2.31 Determination of θ=0deg.
(2) If (180 - ∆θ) ≤ θ ≤ 180, θ is regarded as 180°.
θ
∆θ
V
Tn
V
Mn+1
Fig.2.32 Determination of θ=180deg.
(3) If (90 − ∆θ) ≤ θ ≤ (90 + ∆θ), θ is regarded as 90°.
θ
∆θ
V
Tn
V
Mn+1
θ
∆θ
V
Tn
V
Mn+1
Fig.2.33 Determination of θ=90deg.