1. Fanuc
  2. FANUC Series16i/160i-LB, Gap Control Axis High-Speed Approach Function, Specification

FANUC Series16i/160i-LB, Gap Control Axis High-Speed Approach Function, Specification Additional Manual Page 2

Additional Manual
Edit
Reco
g
nition
2／10
Desi
g
n
FANUC Series 16i/160i -LB
Gap control axis high-speed approach function
A – 78797E
02.05.06
Contents
Date
Design
M.Sato
Title
Drawing
Page
04 2004.07.29 M.Sato NPDS signal has been added.
03 2004.05.20 M.Sato All pages has been changed.
02 2002.09.03 M.Sato Page 7 Error in writing correction
Outline
The approach speed of the gap control function is controlled according to the value multiplied
the gap control gain and the gap deflection.
The larger the gap control gain is set, the faster the approach speed is and the shorter the
approach time is. However, raising the gap control gain too much may cause oscillating the
gap control axis at the approach completing position.
This function makes the approach speed constant until the gap control axis reaches the
position set in the parameter beforehand.
This function can shorten the time spent on the approach operation when the gap control
starts.
This function is available in case of using Gap control B function (parameter No.15840#0).
Explanation
- Standard approach operation
Standard approach operation is as follows.
(1) The gap control axis moves down to the work-piece at the maximum speed until
entering the range where the gap sensor can detect the gap, because the gap sensor
outputs the negative maximum deflection.
(2) The gap control axis moves at the speed proportional to the gap deflection after entering
the gap detection range.
The gap control axis decelerates gradually, because it moves in the direction where the
gap deflection decreases.
(3) The approach completion signal is output to PMC and the approach operation is ended
when the gap deflection reaches the approach completion detection range which is set
in the parameter.
Lm : Upper limit of detection distance of gap sensor (= maximum gap deflection)
Lw : Surface of work-piece
Le : A
pp
roach com
p
letion detection ran
g
e
(
PRM No.15550
)
Horizontal axis : Distance from the standard point of gap
Amount of gap deflection
－
－
0
Le Lm Lw
Feedrate
Deflection
Fig.1 Feedrate of standard approach
Previous page
Next page

Contents Summary of FANUC Series16i/160i-LB, Gap Control Axis High-Speed Approach Function, Specification Additional Manual

  • Page 1FANUC Series16i/160i-LB Gap control axis high-speed approach function Specification Copyright  2004 FANUC LTD. FANUC Series 16i/160i -LB Title Gap control axis high-speed approach function 04 2004.07.29 M.Sato NPDS signal has been added. Drawing A – 78797E 03 2004.05.20 M.Sato All pages has been ch
  • Page 2Outline The approach speed of the gap control function is controlled according to the value multiplied the gap control gain and the gap deflection. The larger the gap control gain is set, the faster the approach speed is and the shorter the approach time is. However, raising the gap control gain too
  • Page 3- High-speed approach operation The approach operation when the gap control axis high-speed approach function is effective is as follows. (1) When the gap control is started, the gap control axis starts the approach operation at the approach speed (PRM No.15845). Please set the acceleration time con
  • Page 4Operation at Pierce point The gap control axis can be stopped at an arbitrary position to pierce a hole while approaching. The procedure is explained with using the following example part program. (1) Specify PRM No.15840#4(LPP) for 1 and specify Pierce point stop signal (NPDS) for 1, and this opera
  • Page 5The gap control axis immediately stops without deceleration when the pierce point signal is set to 1. So, setting the piercing point signal to 1 with the axis moving at high speed might cause shock in the machine. Please slow down the gap control axis by using the deceleration beginning signal (* AP
  • Page 6Signals - Deceleration starting signal *APDEC [Classification] Input signal (High-speed DI interface) [Function] This signal makes the approach speed shift from the parameter value to the value calculated by gap control. The high-speed approach operation is ended and the gap control axis start
  • Page 7- Deceleration request receive signal NPDS [Classification] Input signal [Function] This signal notifies admitted input of Pierce point signal (LPP) to PMC. [Operation] The gap control axis is stopped if Pierce point signal is input when this signal is 1. The Pierce point signal is not acce
  • Page 8Parameter #7 #6 #5 #4 #3 #2 #1 #0 15840 LPP GDS TRB [Data type] Bit TRB Specify whether Gap control B function are enabled or disabled. 0: Disabled 1: Enabled GDS Specify the method of commanding the deceleration start of the gap control axis in the gap control axis high-speed approach function. 0:
  • Page 915847 Deceleration time constant [Data type] Word axis [Unit of data] msec [Valid data range] 0 to 32767 Specify the time from the approach speed to the stop.. Setting too large value to this parameter might cause touching the gap control axis to work-piece. Please be careful in case of changing thi
  • Page 1015855 Acceleration limit at approaching [Data type] Word axis [Unit of data] 0.1m/min2 [Valid data range] 0 to 32767 Specify the limit of acceleration for gap control speed. The servo over-current alarm may occur at gap control start, because the gap control axis starts without time constant of acce