Like all CNC controllers, the Anilam Crusader II has a number of built in, pre-programmed subroutines called "canned cycles." The canned cycles covered in this chapter are routines for Axes Scaling (G53) and X & Y-axis routines for creating rectangular pockets, circular pockets and bolt circles. For details on the other advanced programming capabilities supported by the Crusader II controller, please reference the applicable pages of the Crusader II Programming Manual.
The canned cycles in Chapter 9 are Z-axis routines for creating
drilled, countersunk, counterbored, or bored holes.
All Crusader II canned cycles use the controller's variable registers to hold the various data parameters (user programmed and internal)
required to execute the command. For more information on variable register useage, see
Chapter 5 and Chapter 6 .
In the G53 Scaling canned cycle, allows the programmer to scale the X, Y, &/or Z axes to proportionally change the programmed part size.
The G53 scaling command is modal and requires a G54 command to cancel. Additionally there are two other factors to consider when using the G53 Scaling command:
Programming Requirements:
| Example: | |
| Draw a 4x3 rectangle centered around the point (1,-1) using the uneven scale factors of 4 for the X axis and 3 for the Y axis. |  |
EVENT VAR. VALUE COMMENT
------------------------------------------------------
190 RPD ABS X1 Y-1 $ Move to Rect. Center
191 V11 1 $ Scale Center X
192 V12 -1 $ Scale Center Y
193 V13 0 $ Scale Center Z
194 V16 4 $ Scale Factor X
195 V17 3 $ Scale Factor Y
196 V18 1 $ Scale Factor Z
197 G53 $ Activate Scaling
198 X1.5 Y-.5 $ Upper R/H corner
199 Feed 2.0 $ Plunge Feedrate
200 Z-.1 $ Plunge Z
201 Feed 20.0 $ Transverse Feedrate
202 INC F/R Y-1 $ Down R/H side
203 X-1 $ Across bottom
204 Y1 $ Up L/H side
205 X1 $ Across top
206 G54 $ Deactivate Scaling
Verbose format (with each variable commented):
PROGRAM COMMENT N169 G00 G90 X1 Y-1 $ Move to Rect. Center N170 G29 LV11=1 $ Scale Center X N171 G29 LV12=-1 $ Scale Center Y N172 G29 LV13=0 $ Scale Center Z N173 G29 LV16=4 $ Scale Factor X N174 G29 LV17=3 $ Scale Factor Y N175 G29 LV18=1 $ Scale Factor Z N176 G53 $ Activate Scaling N177 G00 G90 X1.5 Y-.5 $ Upper R/H corner N178 G01 Z-.1 F2.0 $ Plunge Z N179 G91 Y-1 F20.0 $ Transverse Feedrate N180 X-1 $ Across bottom N181 Y1 $ Up L/H side N182 X1 $ Across top N183 G54 $ Deactivate Scaling
or
Compact format (without varible comments):
PROGRAM COMMENT N169 G29 LV11=1 V12=-1 V13=0 $ Set scale origin N170 G29 LV16=4, V17=3, V18=1 $ Set scale factors N171 G53 $ Activate Scaling N172 G00 G90 X1.5 Y-.5 $ Upper R/H corner N173 G01 Z-.1 F2.0 $ Plunge Z N174 G91 Y-1 F20.0 $ Transverse Feedrate N175 X-1 $ Across bottom N176 Y1 $ Up L/H side N177 X1 $ Across top N178 G54 $ Deactivate Scaling
Capabilities: The G77 cycle circular pocket canned cycle can mill a pocket of any diameter and depth (within the range of the machine), taking as many depth passes (pecks) as desired. The pocket must have a radius larger than the cutter radius. Stock can be left for a finish pass at a different feedrate—or the finish pass can be omitted. Programmed parameters (i.e., those specified directly by the programmer) are specified in the command in the variable range V40 through V49.
For more information regarding the function of the variable registers V40-V49 used in programming the G77 canned cycle, see Chapter 5. For details regarding the canned cycle's user-specified and internal variable register useage, see the G77 table in Chapter 6
The G77 circular pocket canned cycle is a non-modal command.
Figure 8-1: G77 Circular Pocket Canned Cycle
Description of Action:
| Example: | |
| Mill a .625" deep circular pocket 3.5" DIA centered at X=1.5 Y=2.375 ABS. Use a .75" DIA 2-flute end mill (0.375" radius). Use 0.100" Z axis clearance over the workpiece and a 0.300 deep peck depth. Set the stepover value at 0.550 (i.e., approximately 70% of cutter diameter, to avoid leaving corner stubs). Leave 0.020" for a finishing pass. Finally, set the finish pass feedrate to be twice roughing feedrate (which is 10 ipm). | |
Verbose format (with each variable commented):
N135 F10 $ SET FEEDRATE N140 G29 LV40=0.100 $ VAR: Z CLEARANCE N141 G29 LV41=1.5 $ VAR: X ABS CENTER POCKET N142 G29 LV42=2.375 $ VAR: Y ABS CENTER POCKET N143 G29 LV43=0.625 $ VAR: POCKET DEPTH (Z) N144 G29 LV44=3.5 $ VAR: POCKET DIAMETER N145 G29 LV45=0.55 $ VAR: MAX XY STEPOVER N146 G29 LV46=0.300 $ VAR: MAX Z PECK / PASS N147 G29 LV47=0.02 $ VAR: FINISH PASS (SIDES AND BOTTOM) N148 G29 LV48=20.0 $ VAR: FINISH PASS FEEDRATE N149 G29 LV49=.75 $ VAR: CUTTER DIAMETER N150 G29 LV50=0 $ VAR: FINISH PASS FLAG (TRUE) N155 G77 $ ACTIVATE CANNED CYCLE
or
Compact format (without detailed parameter comments):
N135 F10 $ SET FEEDRATE $ LOAD VARIABLE REGISTERS FOR CIRCULAR POCKET N140 G29 LV40=0.100 V41=1.5 V42=2.375 V43=0.625 V44=3.5 N145 G29 LV45=0.55 V46=0.300 V47=0.02 V48=20.0 V49=.75 N150 G77 $ ACTIVATE CANNED CYCLE
Capabilities: The G78 cycle rectangular pocket canned cycle can mill a pocket of any length, width, and depth (within the range of the machine), taking as many depth passes (pecks) as desired. The pocket can have corner radii larger than the cutter radius. Stock can be left for a finish pass at a different feedrate--or the finish pass can be omitted. Programmed parameters (i.e., those specified directly by the programmer) are specified in the command as variables V40 through V50.
For more information regarding the function of the variable registers V40-V50 used in programming the G78 canned cycle, see Chapter 5. For details regarding the canned cycle's user-specified and internal variable register useage, see the G78 table in Chapter 6
The G78 rectangular pocket canned cycle is a non-modal command.
Figure 8-2: G78 Rectangular Pocket Canned Cycle
Description of Action:
| Example: | |
| Mill a 6" X-axis by 4" Y-axis by 1.5" Z-axis pocket with 1" radius corners. Locate the (virtual) lower L/H corner of the pocket at X=-2.5 and Y=-1.25. Use a 1" DIA 2-flute end mill (0.5" radius). Use 0.100" Z axis clearance over the workpiece and a 0.375 deep peck depth. Set the stepover value at 0.700 (i.e., 70% of cutter diameter, to avoid leaving corner stubs). Leave 0.020" for a finishing pass. Finally, set the finish pass feedrate to be twice roughing feedrate (which is 10 ipm). | |
EVENT VAR. VALUE COMMENT
------------------------------------------------------------------
35 X -2.5 $ Start X-axis
36 Y -1.25 $ Start Y-axis
37 FEED 10. $ Roughing feedrate
38 V40 .100 $ Start height above the part
$ (Z-clearance)
39 V41 6. $ X-axis length of pocket.
40 V42 4. $ Y-axis length of pocket.
41 V43 1.5 $ Z-axis depth of pocket
$ (excluding Z-clearance).
42 V44 1. $ Pocket's corner radius.
43 V45 .7 $ Maximum X & Y stepover.
44 V46 .375 $ Maximum Z-peck per pass.
45 V47 .02 $ Finish pass stock (sides &
$ bottom = same).
46 V48 20. $ Finish pass feedrate.
47 V49 1. $ Cutter diameter.
48 V50 0 $ Finish pass indicator: set to 0
$ if a finish pass is required or
$ 1 if no finish pass is
$ required.
49 G78 $ Activates the canned cycle.
Verbose format (with each variable commented):
N070 G00 G90 X-2.5 Y-1.25 $ START POSITION (LWR L/H CORNER) N075 F10 $ SET FEEDRATE N080 G29 LV40=0.100 $ VAR: Z CLEARANCE N081 G29 LV41=6.0 $ VAR: POCKET LENGTH (X) N082 G29 LV42=4.0 $ VAR: POCKET WIDTH (Y) N083 G29 LV43=1.5 $ VAR: POCKET DEPTH (Z) N084 G29 LV44=1.0 $ VAR: CORNER RADIUS N085 G29 LV45=0.7 $ VAR: X & Y STEPOVER N086 G29 LV46=0.375 $ VAR: MAX Z PECK / PASS N087 G29 LV47=0.02 $ VAR: FINISH PASS (SIDES AND BOTTOM) N088 G29 LV48=20.0 $ VAR: FINISH PASS FEEDRATE N089 G29 LV49=1.0 $ VAR: CUTTER DIAMETER N090 G29 LV50=0 $ VAR: FINISH PASS FLAG (TRUE) N095 G78 $ ACTIVATE CANNED CYCLE
or
Compact format (without detailed parameter comments):
N070 G00 G90 X-2.5 Y-1.25 $ START POSITION (LWR L/H CORNER) N075 F10 $ SET FEEDRATE $ LOAD VARIABLE REGISTERS FOR RECT POCKET N080 G29 LV40=0.100 V41=6.0 V42=4.0 V43=1.5 V44=1.0 V45=0.7 N085 G29 LV46=0.375 V47=0.02 V48=20.0 V49=1.0 V50=0 N090 G78 $ ACTIVATE CANNED CYCLE
In the G79 Bolt Circle canned cycle, holes are equally spaced between the first and last holes. Progression about the bolt circle is counterclockwise (clockwise rotation can be achieved by mirroring). The positions for the first and last holes are stated relative to the angle zero (3:00 o'clock) position, counterclockwise.
The G79 canned cycle is a non-modal (i.e, one-shot) cycle; however the required G80-series cycle--activated to yield Z-axis drilling motion--is modal and requires a G80 command to cancel.
Programming Requirements:
| Example: | |
| Peck drill (G83) 12 equally spaced holes of 1/4" diameter and 3/4" deep using a feedrate of 3.7 IPM and a peck of 0.25". The holes will be located around a 4.500" diameter bolt circle with its center located at (ABS) X=2.75 and Y=3.6875 . The the first hole is to be 17 degrees from the angle zero (3:00 o'clock) position. | |
EVENT VAR. VALUE COMMENT
------------------------------------------------------------------
170 V20 3.7 $ Z-stroke feedrate (IPM)
171 V21 .100 $ ABS Z clearance plane height
172 V23 .25 $ Peck increment
173 G83 $ Activate canned peck drill cycle.
174 Z -.75 $ ABS Z-depth of all holes.
175 V11 2.75 $ Bolt circle center ABS X-location
176 V12 3.6875 $ Bolt circle center ABS Y-location
177 V13 17 $ Index angle to rotate bolt circle pattern CCW
178 V15 0 $ Angle location of first hole
$ (Negative values are OK.)
179 V16 30 $ Angle location of last hole.
$ (Negative values are OK.)
180 V17 12 $ Number of holes
181 V18 4.5 $ Diameter of bolt circle
182 G79 $ Activate bolt circle canned cycle.
183 G80 $ Deactivate G83
Verbose format (with each variable commented):
PROGRAM COMMENT N170 G29 LV20=3.7 $ Z-axis feedrate N171 G29 LV21=.100 $ ABS Z-axis clearance N172 G29 LV23=.25 $ Peck increment. N173 G83 $ Activate peck drill cycle. N174 G90 Z-0.75 $ ABS Z-depth of holes N180 G29 LV11=2.75 $ ABS X location of BC Ctr N181 G29 LV12= 3.6875 $ ABS Y location of BC Ctr N182 G29 LV13=17 $ Index angle (CCW rotation) N183 G29 LV15=0 $ Angle of 1st hole N184 G29 LV16=30 $ Angle of last hole N185 G29 LV17=12 $ Number of holes N186 G29 LV18=4.5 $ Diameter of BC N190 G79 $ Activate bolt circle canned cycle N195 G80 $ Cancel G83 Z-axis cycle
or
Compact format (without comments):
PROGRAM COMMENT N165 G29 LV20=3.7 V21=.100 V23=.25 $ Set peck drill parameters N170 G83 $ Activate peck drill cycle. N175 G90 Z-0.75 $ ABS Z-depth of holes $ Set Bolt Circle parameters N180 G29 LV11=2.75 V12= 3.6875 V13=17 V15=0 N185 G29 LV16=30 V17=12 V18=4.5 N190 G79 $ Activate bolt circle canned cycle N195 G80 $ Cancel G83 Z-axis cycle
Copyright © 2003-2007 George C. Stanton & Bill Hemphill
All Rights Reserved
Last updated on Dec. 7, 2007 by Bill Hemphill