
A-78709E
Edit
Apprv. Desig.
Sheet
Title
Draw
No.
Date
Design
Descri
tion
Date
FANUC Series 16i –MB, 18i –MB5
Tool Center Point Control For 5-Axis
machining Specifications
Dec.01.2001
02 Mar.22.2002
T.Mochida All revision H.Kouzai
T.Mochida H.Kouzai
03 Dec.27.2002
T.MochidaWorkpiece coordinate system,circular ,Type2 add H.Kouzai
04 Mar.12.2003 M.Tanaka All revision H.kouzai
19
97
05 Jan.26.2004 T.Mochida Correction and addition of 5) E.Genma
Because the specified speed is the speed in the tangent direction of the arc, the
speed of the straight line axis, when seen from the table coordinate system, is:
arc theofLength
axis linestraight theofLength
×F
.
Depending on parameter RHT (No.1407#4), the specified speed varies as shown in
the following table.
RHT (No.1407#4)
0 1
Tangential speed of the arc Synthetic speed of the straight line
axis speed and tangential speed
No rotation axes are specified. Instead, the direction of the tool end point is specified
as I, J, K, as seen from the programming coordinate system (the one fixed on the
table when G43.5 is specified).
With a tool rotation type machine, I, J, K can be specified using the G43.5 block.
In the case of a table rotation type or mixed type machine, however, these cannot be
specified at the block of G43.5. Specifying them with a table rotation type or mixed
type machine causes alarm PS5421.
While the rotation axes are moving, the CNC controls the control points so that the
tool center point moves helically with respect to the table (workpiece). The end of
the tool center point comes to the point specified on the programming coordinate
system.
CAUTION
1 Only arc radius R can be specified. (The distance from the start
point to the center of the arc cannot be specified using I, J, and K.)
2 A round circle cannot be specified.
3 Any command that does not move the tool center point with respect
to the workpiece (one that moves the rotation axes only) must be
executed in G00 or G01 mode.
4 See the CAUTION box for “Position and linear interpolation for tool
center point control (type 2)”.