FS 16i/18i/21i Additional Manual Page 7

Additional Manual
7/11
A- 77987EN
DRAW.No.
FANUC Series 16
i
/18
i
/21
i
Specifications of Distance Coded Linear
Scale Interface Ex
p
ansion
Title
Newly Registered
DESCRIPTIONDESIGNE
99.12.03
DATE
01
EDIT.
(2) When an Incremental command is specified
Each axis moves only by the commanded distance. That is, the behavior of the axis is
shown on a bold line in the figure below. However, the figure shows each position, and it
does not show an actual tool path.
The coordinate value of the end point becomes the value in newly established coordinate
system. That is, the coordinate value of the end point shifts by the difference (a,b) if there
is the difference (a,b) between a newly established coordinates system and old one.
For instance, when "G91 G00 X100.Y30; (M system)" or "G00 W100.U30; (T system)" is
commanded at the position of (0,0), the movement amount of each axis becomes (100,30)
and the coordinates value of end point becomes (100-a, 30-b).
2.1.2.3 Short distance movement
The axis reaches the end point before passing 3 or 4 reference marks when the specified
distance is too short. For this case, the axis moves at the FL speed to detect the reference
marks, but reference point is not established because CNC cannot detect enough reference
marks.
When the reference point is not established, the reference point establishment operation is
executed again by the next G00 command. Information of the reference marks detected in
the last establishment operation is not used at this time, and the reference point is
established by detecting 3 or 4 reference marks again.
Fig.6 Operation of incremental command
SP : Start point
EP
: Actual end point ((100-a,30-b) in new coordinate system)
EP’ : End point when G00 is commanded((100,30) in old coordinate system)
(a,b) : Difference between coordinate systems before and after the reference point establishment
A : The point where the reference points are established
B : (100,30) in new coordinate system
ZOFS : Workpiece zero point offset value
A
SP
Old machine coordinate system
not exact
ZOFS
B (100,30)
New workpiece coordinate system
exact
New machine coordinate system
exact
Old workpiece coordinate system
not exact
EP’ (100,30) = EP (100-a,30-b)
ZOFS
(a,b)

Contents Summary of FS 16i/18i/21i Additional Manual

  • Page 1FANUC Series 16i/18i/21i Specifications of Distance Coded Linear Scale Interface Expansion CONTENTS 1. Outline 2 2. Specifications 2 3. Parameter 11 TitleFANUC Series 16i/18i/21i Specifications of Distance Coded Linear Scale Interface Expansion 01 99.12.03 Newly Registered DRAW.No. A- 77987EN EDIT.
  • Page 21. Outline Intervals of reference marks of distance coded linear scale are variable. That is, if CNC can know the interval of reference marks, it can know an absolute position on the scale. When the axis is moved by G00 command or JOG mode, this function establishes the reference point by measuring
  • Page 3• Programmable mirror image (M system) • Scaling (M system) • High-precision contour control (M system) • AI nano contour control (M system) • Mirror image for double turrets (T system) Note When the above condition is not satisfied, the reference point establishment operation is not started, and be
  • Page 4The specification of reference point establishment by detecting some reference marks is compatible with the former one. The restriction, parameter setting method, and so on are also the same as the former specifications. Please refer to "FANUC Series 16/18/16i/18i/21i distance coded linear scale int
  • Page 5(3) When, in the same block, the reference point establishment operation is executed for some target axes, and it is not executed for other target axes. For instance, when the reference point of X axis has been established, and the reference points of Y and Z axis have not been established yet, and
  • Page 62.1.2.2 Absolute command and incremental command As described in Item 2.1.2 (4), the axis is positioned to the commanded end point after the reference point is established. The operation at this time is as follows. (1) When an absolute command is specified The axis moves to the end point in the new
  • Page 7(2) When an Incremental command is specified Each axis moves only by the commanded distance. That is, the behavior of the axis is shown on a bold line in the figure below. However, the figure shows each position, and it does not show an actual tool path. The coordinate value of the end point becomes
  • Page 82.1.2.4 Stopping by feed hold The operation becomes a non linear positioning when execution is restarted after the feed hold during the reference point establishment operation. And the reference point establishment operation is not restated in this block. The reference point establishment operation
  • Page 92.2 Reference point establishment by JOG feed 2.2.1 Requirement In satisfying the followings, the reference point establishment operation is automatically started. (1) When feed axis and direction selection signal +Jn or -Jn (G100/G102) is input in the JOG mode to the axis which the reference point
  • Page 10The operation of the above-mentioned is shown in timing chart. JOG +Jn(-Jn) Reference marks ZRFn Feedrate JOG feedrate FL speed Time Fig.7 Timing chart for reference point establishment operation by JOG feed 2.2.2.1 Stopping by feed axis and direction selection signal The axis stops when the feed ax
  • Page 112.3 Notes (1) PMC axis control The reference point establishment operation is not executed by the rapid traverse (axis control command 00h) and the JOG feed (axis control command 06h) of PMC axis control. (2) Rapid traverse operation by command other than G00 The reference point establishment operat