1. Fanuc
  2. FANUC Series 16i/18i-MA Electronic Gear Box 2 Pair

FANUC Series 16i/18i-MA Electronic Gear Box 2 Pair Additional Manual Page 21

Additional Manual
Edit.
21/26
Date Signature Change
FS16i/18i-MA
Electronic Gear Box 2 Pair Specifications
1999/03/26
A-63501E
H.Shiobara
02
1999/05/17
Pa
g
e 5 & 11 were corrected. E.Genma
E.Genma
K.Endo
03
1999/1029
Pa
g
e 8 was corrected
Note the following points when specifying parameters for the electronic gear box.
1. Arrange the controlled axes such that a slave axis appears before a dummy axis.
（Example）
Example of incorrect setting Example of correct setting
Axis name
Servo axis
number
(No.1023)
Axis name
Servo axis
number
(No.1023)
X1X1
Y2Y2
C (dummy axis) 3 C (slave axis) 3
C (slave axis) 4 C (dummy axis) 4
2. Do not use a name which is usually not allowed to be used as an axis address, such as D.
3. Specify the same values for an EGB slave axis and an EGB dummy axis in the following
parameters.
1004#7 Ten times minimum input increment
1001#0 Inch/metric switching (rotation axis/linear axis)
1006#1 Shape of machine coordinate system (rotation axis/linear axis)
1006#2 Shape of machine coordinate system for pitch error compensation (rotation
axis/linear axis)
1420 Rapid traverse rate
1421 Rapid-traverse override F0 speed
1820 Command multiplication
4. Specify the amount of travel per rotation about a rotation axis for a slave axis in a
parameter No. 1260.
5. Make the specification for a dummy axis in the following way.
1815#1 Whether to use separate detectors. Although an EGB dummy axis uses
the interface of a separate detector, set these parameters to 0.
6. If the following parameters are not specified, an alarm (SV 417 servo parameter invalid)
may be generated. In such a case, make the specification as described below.
20XX Specify the same value for both a slave axis and a dummy axis.
2084, 2085 Flexible feed gear.
Set parameters Nos. 2084 and 2085 to 1 for the dummy axis.
7. Specify as large a feed-forward coefficient as possible to reduce the synchronization error.
For details of parameter setting, see Feed-forward setting of Geometric error suppression
function in FANUC AC SERVO MOTOR a Series Parameter Manual (B-65150).
Previous page
Next page

Contents Summary of FANUC Series 16i/18i-MA Electronic Gear Box 2 Pair Additional Manual

  • Page 1FANUC Series 16i/18i-MA Electronic Gear Box 2 Pair Specifications 1. SPECIFICATIONS ......................................................................................................................... 2 1.1. CONFIGURATION EXAMPLES OF CONTROLLED AXES .............................................
  • Page 21.Specifications The Electronic Gear Box is a function for rotating a workpiece in sync with a rotating tool, or to move a tool in sync with a rotating workpiece. With this function, the high- precision machining of gears, threads, and the like can be implemented. A desired synchronization ratio can
  • Page 32.Operations 2.1.Specifications The Electronic Gear Box is a function for rotating a workpiece in sync with a rotating tool, or to move a tool in sync with a rotating workpiece. With this function, the high- precision machining of gears, threads, and the like can be implemented. A desired synchroniz
  • Page 42.1.1.Configuration examples of controlled axes Spindle : EGB master axis serving as a tool axis First axis : X Second axis : Y Third axis : C axis (EGB slave axis serving as a workpiece axis) Fourth axis : C axis (EGB dummy axis, which cannot be used as a usual controlled axis) Fifth axis : V axis
  • Page 52.2.Command Description 2.2.1.Synchronization start When the ratio of the master-axis travel to the slave-axis travel is specified, synchronization starts. T t  β j  G81.5    ; P p β 0 L l Master-axis travel Slave-axis travel Specify the master-axis travel in either of the following ways
  • Page 62.2.2.Synchronization end 1. Canceling synchronization for each axis by issuing a command With a G80.5 β 0 command, synchronization is canceled. β is the address of the slave axis. Synchronization of the slave axis specified by β is canceled. A cancellation command can be issued only for one axis in
  • Page 72.2.3.Description of commands compatible with those for a hobbing machine A command compatible with that for a hobbing machine can be used as a synchronization command. Such a command cannot be used when a canned-cycle option is provided. Specify which axes starts synchronization with such a command
  • Page 8(2) Synchronization end When the following command is specified, sysnchronization is cancelled. G80; Synchronization of all synchronized axes is canceled. When a synchronization cancellation command is issued, the absolute coordinates for the slave axis are updated according to the amount of travel
  • Page 9Compensation direction in helical gear compensation Parameter HDR (bit 2 of No. 7700) When the HDR bit is set to 1 (a) (b) (c) (d) Z{ { C { C { C { C C F{ , Z F ,{P F { C F { , Z F ,{P F | C F { , Z F ,|P F { C F { ,Z F | ,P F | Compensation direction F { Compensation direction F | Compensation dire
  • Page 102.3.Sample programs (1) When the master axis is the spindle, and the slave axis is the C-axis 1. G81.5 T10 C0 L1 ; Synchronization between the master axis and C-axis is started at the ratio of one rotation about the C-axis to ten rotations about the master axis. 2. G81.5 T10 C0 L-1 ; Synchronization
  • Page 11(3) When two groups of axes are synchronized simultaneously Based on the controlled axis configuration described in 2.1, the sample program below synchronizes the spindle with the V-axis while the spindle is synchronized with the C-axis. O0100 ; ............... N01 Mxx ; Performs spindle orientation
  • Page 12(4) Command specification for hobbing machines Based on the controlled axis configuration described in 2.1, the sample program below sets the C-axis (in parameter 7710) for starting synchronization with the spindle according to the command specification method for hobbing machines. O1234 ; .........
  • Page 132.4.Synchronization Ratio Specification Range The programmed ratio (synchronization ratio) of a movement along the slave axis to a movement along the master axis is converted to a detection unit ratio inside the NC. If such converted data (detection unit ratio) exceeds a certain allowable data range
  • Page 14(1) When the master axis is the spindle, and the slave axis is the C-axis (a) Command : G81.5 T10 C0 L1 ; Operation : Synchronization between the spindle and C-axis is started at the ratio of one rotation about the C-axis to ten spindle rotations. Pm : (Number of pulses per spindle rotation) × 10 ro
  • Page 15(e) Command : G81.5 P10000 C-0.214 ; Operation : Synchronization between the spindle and C-axis is started at the ratio of a -0.214 degree rotation of the C-axis to 10,000 feedback pulses from the pulse coder of the spindle. Pm : (Specified number of feedback pulses from the pulse coder of the spind
  • Page 16Example 2) Based on the controlled axis configuration described in 2.1., suppose that the spindle and V-axis are as follows: Spindle pulse coder : 72000 pulse/rev (4 pulses for one A/B phase cycle) C-axis least command increment : 0.001 degree C-axis CMR : 1/2 V-axis least command increment : 0.001m
  • Page 172.5.Retraction function When retract signal RTRCT is set to 1 (on the rising edge of the signal), retraction is performed according to the retract value set in parameter No. 7741 and the feedrate set in parameter No. 7740. The tool does not move along an axis for which the amount of retraction is se
  • Page 183.Signals Retract signal RTRCT [Classification] Input signal [Function] Retracts along the axis specified in the parameter. [Operation] When this signal is set to "1", the CNC operates in the following way. At the rising edge of this signal, retraction can be performed for the axis for which
  • Page 19EGB mode confirmation signal EGBM1, EGBM2, ... [Classification] Output signal [Function] Reports that synchronization is being executed by EGB. This signal is output to a slave axis. EGBMx x: 1 ..... First axis synchronized by EGB 2 ..... Second axis synchronized by EGB 3 ..... Third
  • Page 204.Parameters The following table lists the parameters related to EGB. Data number Description 1006 # 0 To specify a speed with L in a slave-axis amount of travel in a synchronization command, the 1006 # 1 slave axis needs to be set to a rotation axis (a parameter ROT, bit 0 of No. 1006, and a parame
  • Page 21Note the following points when specifying parameters for the electronic gear box. 1. Arrange the controlled axes such that a slave axis appears before a dummy axis. （Example） Example of incorrect setting Example of correct setting Servo axis Servo axis Axis name number Axis name number (No.1023) (No
  • Page 221023 Number of the servo axis for each axis [Data type] Byte axis [Valid range] 1 to the maximum number of controlled axes Specify the number of the servo axis that corresponds to each control axis. Normally, set each servo and control axis to the same numbers. For axes under electronic gear box (EG
  • Page 23#7 #6 #5 #4 #3 #2 #1 #0 7700 HDR HBR [Data type] Bit HBR Specifies whether to cancel the synchronous mode (G81, G81.5) when the electronic gear box function (EGB) is used. 0: Cancel upon reset. 1: Do not cancel upon reset. The synchronous mode is canceled by the G80 or G80.5 code only. HDR Helical g
  • Page 24#7 #6 #5 #4 #3 #2 #1 #0 7702 ART [Data type] Bit ART Specifies whether the retraction function based on a servo spindle alarm is valid. 0: Not valid. 1: Valid 7709 Axial-feed axis number in helical compensation [Data type] Byte [Valid range] 1 to the maximum number of controlled axes This parameter
  • Page 257740 Retract feedrate [Data type] 2 word axis [Data unit and valid range] Valid range Increment system Data unit IS-B IS-C Millimeter machine 1 mm/min 30 to 240000 30 to 100000 Inch machine 0.1 inch/min 30 to 96000 30 to 48000 This parameter sets the feedrate during retration for each axis. 7741 Ret
  • Page 265.Alarms and messages Number Message Contents P/S 181 FORMAT ERROR IN G81 BLOCK Format error in the block in which EGB was specified (1) The axis during synchronization by EGB is specified by G81.5 again. (2) U-axis is specified by G81.5/G80.5 with U-axis control. (3) Format error in the block in wh