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Series 30i-MODEL A, Small-Hole Peck Drilling Cycle Additional Manual Page 11

Additional Manual
Design Ed.
Approve
Design
page
Title
Draw.
No.
9/16
Description
FANUC Series 30i-MODEL A
Small-Hole Peck Drilling Cycle
A-79414E
Feb. 23, 2004
Date
Date
2.1 Small-Hole Peck Drilling Cycle
General
In peck drilling, the tool enters and retracts from hole based on an
overload torque detection signal (skip signal) until the designed hole
depth is reached. The spindle speed and cutting feedrate are changed on
each entry of the hole.
The cycle is realized by:
* X- and Y-axis positioning
* Positioning at point R along the Z–axis
* Cutting along the Z-axis (first time, depth of cut Q, incremental)
Retracting
(bottom of hole → minimum clearance ∆, incremental)
Retraction
( bottom of hole+∆→ to point R, absolute)
Forwarding
(point R → to point with hole bottom + clearance ∆, absolute)
Cutting
(second and subsequent times, cut of depth Q + ∆, incremental)
* Dwell
* Return to point R along the Z-axis (or initial point) = end of cycle
G83 (G98) G83 (G99)
Change of cutting conditions
The cutting conditions are changed at each pecking operation (forwarding →
cutting → retracting) during one G83 cycle. Bits 1 and 2 of parameter
No. 5160 affects the cutting conditions.
- Changing of cutting feedrate
The cutting feedrate programmed with the F word is changed during the
second and subsequent cutting operations. Parameter Nos. 5166 and 5167
specify the ratio of change for the case in which a skip signal was received
∆
∆
∆
Point R Point R
Point Z
Q
Initial level
Dwell
Overload torque
Point Z
Q
Dwell
Overload tor
q
ue
Point R level
∆
Repeated until
p
oint Z is reached
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Contents Summary of Series 30i-MODEL A, Small-Hole Peck Drilling Cycle Additional Manual

  • Page 1TECHNICAL REPORT NO. TMN 04/020E Date :Mar .30, 2004 General Manager of Software Laboratory FANUC Series 30i-A Newly additional functions 1. Communicate this report to: Your information only GE Fanuc-N, GE Fanuc-E FANUC Robotics MILACRON Machine tool builder Sales agency End user 2. Summary for Sale
  • Page 2FANUC Series30i –A newly additional functions Drawing number Functions 1 A-79227E External Data Input 2 A-79226E One Touch Macro call 3 A-79196E Temporary absolute coordinate setting 4 A-79354E System alarm 5 A-79349E Touch Panel Control 6 A-79253E Distance coded linear scale interface 7 A-79364E Li
  • Page 3FANUC Series 30i-MODEL A Small-Hole Peck Drilling Cycle Specifications FANUC Series 30i-MODEL A Title Small-Hole Peck Drilling Cycle Draw. No. A-79414E Ed. Date Design Description page 1/16 Date Feb. 23, 2004 Design Approve
  • Page 41 Programming (M-type) FANUC Series 30i-MODEL A Title Small-Hole Peck Drilling Cycle Draw. No. A-79414E Ed. Date Design Description page 2/16 Date Feb. 23, 2004 Design Approve
  • Page 51.1 Small-Hole Peck Drilling Cycle An arbor with the overload torque detection function is used to retract the tool when the overload torque detection signal (skip signal) is detected during drilling. Drilling is resumed after the spindle speed and cutting feedrate are changed. These steps are repea
  • Page 6Explanations - Componet operations of the cycle * X- and Y-axis positioning * Positioning at point R along the Z–axis * Cutting along the Z-axis (first time, depth of cut Q, incremental) Retracting (bottom of hole → minimum clearance ∆, incremental) Retraction Repeated until ( bottom of hole+∆→ to p
  • Page 7Note When receiving overload torque detect signal while the tool is advancing, the tool will be retracted (clearance ∆ and to the point R), then advanced to the same target point as previous advancing. - Changing the drilling conditions In a single G83 cycle, drilling conditions are changed for each
  • Page 8When the cutting feedrate reaches the minimum rate, the spindle speed is not changed. The spindle speed can be increased up to a value corresponding to the maximum value of S analog data. - Advance and retraction Advancing and retraction of the tool are not executed in the same manner as rapid-trave
  • Page 9- Custom macro interface The number of retractions made during cutting and the number of retractions made in response to the overload signal received during cutting can be output to custom macro common variables (#100 to #149) specified in parameters No.5170 and No.5171. Parameters No.5170 and No.51
  • Page 102 Connection (M-type) FANUC Series 30i-MODEL A Title Small-Hole Peck Drilling Cycle Draw. No. A-79414E Ed. Date Design Description page 8/16 Date Feb. 23, 2004 Design Approve
  • Page 112.1 Small-Hole Peck Drilling Cycle General In peck drilling, the tool enters and retracts from hole based on an overload torque detection signal (skip signal) until the designed hole depth is reached. The spindle speed and cutting feedrate are changed on each entry of the hole. The cycle is realized
  • Page 12during the previous cutting operation and the case in which no skip signal was received during the previous cutting operation, respectively. Cutting feed rate = F × α (First time) α = 1.0 (Second and subsequent times) α = α × β ÷ 100 (where β is the rate of change for each drilling operation Skip du
  • Page 13Signals Overload torque signal SKIP#1, SKIP#2, SKIP#3 [Classification] Input signal [function] Retracts a tool if an overload torque occurs. [Operation] When this signal becomes "1", the control unit operates as follows: - Retracts the tool, and changes the spindle speed and
  • Page 14Parameters No. #7 #6 #5 #4 #3 #2 #1 #0 5160 NOL OLS [Input type] Parameter input [Data type] Bit path #1 OLS When an overload torque signal is received in a peck drilling cycle, the feed and spindle speed are 0: Not changed. 1: Changed. #2 NOL When the depth of cut is reached, the feed and spindle s
  • Page 15No. Data Percentage of the spindle speed to be changed when the tool is retracted 5165 without an overload torque signal received [Input type] Parameter input [Data type] Word path [Unit of Data] % [Valid data range] 1 to 255 This parameter sets the percentage of the spindle speed change during a pe
  • Page 16F1: Cutting feedrate to be changed F2: Changed cutting feedrate Set b2 as a percentage. Note If the set value is 0, the cutting feedrate will not be changed. No. Data Lower limit of the percentage of the cutting feedrate 5168 in a small-hole peck drilling cycle [Input type] Parameter input [Data typ
  • Page 17No. Data 5172 Speed of retraction to point R when no I address is defined [Input type] Parameter input [Data type] Real path [Unit of data] mm/min, inch/min (input unit) [Minimum unit of data] Depend on the increment system of the reference axis [Valid data range] Refer to the standard parameter set
  • Page 18Alarms and Messages - Diagnostic display 520 Total number of retract operations during cutting since G83 was issued Total number of retract operations due to reception of the overload torque 521 signal since G83 was issued Note The indications of No. 520 and 521 are cleared by G83 during small-hole