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FS 16i/18i-TA/TB Hobbing Function (for Lathe) Additional Manual Page 19

Additional Manual
PAGE
18/21
FANUC Series 16
i
/18
i
–TA/TB
HOBBING FUNCTION
EDT. DATE DESIG. DESCRIPTION
A – 78600E
NO.
TITLE
01 2001.09.17 Newly
Notice
Retract
(1) Feedrate override is not supported for retracting.
(2) Interlock is supported for retracting.
(3) Machine lock is supported for retracting. Retract completion signal is
output when retract operation is completed in the machine lock
condition.
(4) Feed hold is not supported for retracting.
(5) The mirror image (the signal or the setting) is invalid. Therefore, the
direction of retract is the direction of the machine coordinate. (The
mirror image is valid for update of the absolute coordinate.)
(6) When retract is executed during automatic operation, the control
unit enters the feed hold state at the same time as the retract
operation starts.
(7) Retract keeps acceleration/declaration type as the same type before
starting retract.
(8) Retract operation stops, when Reset or Emergency-stop is executed
during retract movement. At this time, the retract completion signal
is not turned to “1”.
(9) When the servo alarm or the OT alarm of the retract axis occurs
during retract movement, retract operation stops. At this time, the
retract completion signal is not turned to “1”. However, when alarms
except the OT alarm or the servo alarm occurs, retract operation does
not stop.
(10) Even if the retract signal RTRCT is turned to “0” after retract
operation starting, retract operation does not stop.
(11) The retract signal RTRCT is not accepted while the retract
completion signal RTRCTF is set to “1”.
(12) Even if the retract is executed to the axis controlled by PMC, the
movement command for the PMC axis is not canceled. In this case,
the PMC axis must be canceled by the PMC axis reset signal ECLRg
at the same time as the retract signal RTRCT is turned to ”1”.
Advanced Preview Control
(1) Hobbing function and retract function are not supported in Advanced
Preview Control mode and high-precision contour control mode.
High speed cycle
(1) Hob machining function and Retract function are not supported in
high-speed cycle cutting or binary operation.
Synchronous control and
Composite control and
Overlap control to C-axis
(1) If C-axis(workpiece) is in synchronous/composite/overlap mode,
G81.4(Starts hob synchro) can not be commanded. Alarm 187 occurs
if G81.4 is commanded.
(2) Synchronous/composite/overlap control to C-axis can not start in hob
synchronous mode. Alarm 225 occurs if these controls start.
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Contents Summary of FS 16i/18i-TA/TB Hobbing Function (for Lathe) Additional Manual

  • Page 1TECHNICAL REPORT (MANUAL) No.TMN 01/153E Date : Oct. 25, 2001 General Manager of Software Development Center FANUC Series 16i/18i-TA/TB Hobbing Function (for Lathe) 1. Communicate this report to: Your information only ○ GE Fanuc-N, GE Fanuc-E FANUC Robotics MILACRON ○ Machine tool builder Sales agen
  • Page 2FANUC Series 16i/18i-TA/TB HOBBING FUNCTION Specifications This specification may be modified for improvement without notice. FANUC Series 16i/18i –TA/TB TITLE HOBBING FUNCTION 01 2001.09.17 Newly A – 78600E NO. EDT. DATE DESIG. DESCRIPTION 1/21 PAGE
  • Page 31 HOBBING FUNCTION General(G80.4, G81.4) Gears can be cut by turning the workpiece (C–axis) in sync with the rotation of the spindle (hob axis) connected to a hob. Also, a helical gear can be cut by turning the workpiece (C–axis) in sync with the motion of the Z–axis (axial feed axis). Format G81.4
  • Page 4G code G code Group Function G80.4 Cancels synchronization between the hob axis and C- axis. G81.4 Starts synchronization between the hob axis and C- axis. 00 G82.4 Cancels C-axis servo delay compensation. G83.4 Executes C-axis servo delay compensation. G84.4 Records C-axis servo delay compensation.
  • Page 5Helical Gear Compensation When a helical gear is to be cut, compensation for the C-axis, according to the amount of travel along the Z-axis (second axis) (axial feed) and gear helix angle, is required. Helical gear compensation is performed by adding compensation pulses, calculated using the followi
  • Page 6Direction of Helical gear compensation 1 When bit 2 (HDR) of parameter No. 7700 = 1 (a) (b) (c) (d) +C +C +C +C +Z +Z +Z +Z -Z -Z -Z -Z C:+ C:+ C:+ C:+ Z:+ Z:+ Z:- Z:- P:+ P:- P:+ P:- Compensation Compensation Compensation Compensation direction :+ direction :- direction :- direction :+ (e) (f) (g)
  • Page 7Setting helical gear axial feed axis The Z-axis (axial feed axis) is usually the second axis. However, any axis can be set as the Z-axis by setting the corresponding parameter appropriately (parameter No. 7709). C axis servo delay compensation The servo delay is proportional to the speed of the hob
  • Page 8Method in which compensation for the delay when a command is specified is performed (G82.4, G83.4) G82.4 : Cancels C-axis servo delay compensation. G83.4 : Executes C-axis servo delay compensation. G81.4 R___ L___ ; Starts synchronization. M03 S100 ; Rotates the hob axis. G04 P2000 ; Causes the tool
  • Page 9Notes (1) Specify the G83.4 block in G01 mode. Also, specify a feedrate using the F code. (2) Once G83.4 has been specified, another G83.4 command cannot be specified until compensation is canceled by specifying G82.4, or until C-axis synchronization is canceled. (3) Specify G83.4 once a constant ho
  • Page 10C axis synchronous shift - C-axis handle interrupt During synchronization between the hob axis and C-axis, manual handle interrupt can be performed for the C-axis. The C-axis is shifted by the amount of the handle interrupt. - Synchronous shift by programming During synchronization between the hob a
  • Page 11Retract function When the retract signal RTRCT is turned to “1” (the rising edge is detected) in auto mode or manual mode, the axis set in bit 0 (RTR) of the parameter No.7730 moves (retracts) by the amount set in the parameter No.7741. Upon the completion of retraction, the retract completion signa
  • Page 12Signals Retract signal RTRCT [Classification] Input signal [Function] Performs retraction for the axis specified with a parameter. [Operation] When this signal turns to “1”, the control unit performs the following: Detects the rising edge of this signal, and performs retraction on the axis
  • Page 13(2) The stopping of retract by the reset RTRCT RTRCTF Moving Retract movement stopping RST One-rotation position manual set signal MSPC [Classification [Classification] Classification] Input signal [Function] Shifts the one-rotation signal position of the position coder. [Operation] When thi
  • Page 14MSPCF [Classification [Classification] Classification] Output signal [Function] Indicates that the one-rotation signal position has been set up according to one-rotation position manual set signal MSPC. [Operation] The signal becomes 1 when: - The one-rotation signal position is set up accor
  • Page 15Parameter #7 #6 #5 #4 #3 #2 #1 #0 1006 ROTx [Data Type] Bit axis ROTx Specifies whether each axis is a linear or rotation axis. 0 : linear axis 1 : rotation axis The C-axis (workpiece axis) must always be a rotation axis. #7 #6 #5 #4 #3 #2 #1 #0 3704 PCS [Data Type] Bit axis PCS Set this bit to 1 if
  • Page 16#7 #6 #5 #4 #3 #2 #1 #0 7701 HBD DLY JHD SM3 SM2 SM1 [Data Type] Bit SM1, SM2, SM3 Specify the sampling frequency of the feedback pulses from the position coder in the hob function, SM3 SM2 SM1 Sampling times 0 0 0 4 0 0 1 1 0 1 0 2 0 1 1 16 1 0 0 32 1 1 0 4 1 1 1 4 JHD Specifies whether to enable C
  • Page 177711 Gear ratio of the hob axis to the position coder [Data Type] Byte [Data Range] 1 to 20 [Unit of Data] 1 This parameter specifies the gear ratio of the hob axis to the position coder. 7712 Acceleration/deceleration time constant applied to the C-axis when it is in sync with the hob axis [Data Ty
  • Page 187715 Magnification 1 for a G83.4-based C-axis servo delay compensation [Data Type] Word [Unit of Data] 0.0001 / 0.001 [Data Range] 500 to 2000 This parameter specifies magnification 1 for a G83.4-based C-axis servo delay compensation. #7 #6 #5 #4 #3 #2 #1 #0 7730 RTRx [Data Type] Bit axis RTRx The r
  • Page 19Notice Retract (1) Feedrate override is not supported for retracting. (2) Interlock is supported for retracting. (3) Machine lock is supported for retracting. Retract completion signal is output when retract operation is completed in the machine lock condition. (4) Feed hold is not supported for ret
  • Page 20Canned Cycle (1) Canned Cycle (from G81 to G89) can not be commanded in Hob synchro mode. Alarm 184 occurs if canned cycles are commanded. (2) G81.4(Starts Hob synchro) can not be commanded in canned cycle mode. Alarm 187 occurs if G81.4 is commanded. Thread Cutting (1) Retract is available in threa
  • Page 21IS-D Hobbing function is not supported in IS-D system. Alarm 10 IMPROPER G-CODE 1. G80.4 to G84.4 are specified without option of Hobbing function. 2. G84.4 is specified in case parameter No.7701 bit 5 is set to 0 181 FORMAT ERROR IN G81.4 The G81.4 block is not of the BLOCK correct format. 1.R(numb
  • Page 22186 PARAMETER SETTING A value for a parameter related ERROR to G81.4 is invalid. 1. The C-axis has not been specified as a rotation axis (bit 0 (ROT) of parameter No. 1006). 2. A value specified as the gear ratio of the hob axis to the position coder is invalid (parameter No. 7711). Note) These erro