Need Help!- How to Retract over fixture toe clamps while drilling

[nfrees114]

So I have a haas VF-2 and have a peck drill cycle (G83). I have to retract 1" between holes to clear the fixture toe clamps. well I am cutting 1" of air on every hole. I was just wondering if there was a way to modify the G code so that it would start at .1" and drill the hole but then between the holes it would retract to 1". Any help would be greatly appreciated!!

Thanks!!

-Nate

[Superman]

Usually an R value defines the start of the cycle, called the retract plane
the initial level is the Z plane the tool is at before processing the drill cycle

ie
G0 X0 Y0
Z2.0 ( initial level )
G83 Z-1.5 R0.1 Q0.2 F4.000 M98 ( rapids to Z0.1, feed to Z-1.5, rapid retract to Z2.)
XY
XY M99 --> stays down( rapids to Z0.1, feed to Z-1.5, rapid retract to Z0.1 )
XY --> stays down
XY --> stays down
XY M98 --> goto Z2 at cycle end
XY


M98 is to return to the initail level ---being Z2.0, to clear all after each hole
M99 would make it go to Z0.1 after each hole --which would put you thru the clamps

You can put the M code after each hole to cut out the high retracts, but prove it off 1st without the clamps. The M code is modal.

[nfrees114]

So for this line of code I would change N132 line the Z to 1.0 not .1? and then on N133 give it a G98 code instead of a G99 code? and that will fix my problem??

(NEXT CUT - NEXT TOOL)
(JOB 4 HOLE RANDOM POINT PATTERN)
(3/16 HOLE)

N130 T03 M06
N131 G90 G54 X5.468 Y2.062 S3340 M03
N132 G43 H03 Z.1 M08
N133 G83 G99 X5.468 Y2.062 Z-.575 R.1 Q.0938 P0. F15.
N134 X8.468
N135 X11.468
N136 X14.468
N137 X17.468
N138 X20.468
N139 X23.468
N140 M09
N141 M05
N142 G00 G91 G28 Z0.
N143 M01

[nfrees114]

So for this line of code I would change N132 line the Z to 1.0 not .1? and then on N133 give it a G98 code instead of a G99 code? and that will fix my problem??

(NEXT CUT - NEXT TOOL)
(JOB 4 HOLE RANDOM POINT PATTERN)
(3/16 HOLE)

N130 T03 M06
N131 G90 G54 X5.468 Y2.062 S3340 M03
N132 G43 H03 Z.1 M08
N133 G83 G99 X5.468 Y2.062 Z-.575 R.1 Q.0938 P0. F15.
N134 X8.468
N135 X11.468
N136 X14.468
N137 X17.468
N138 X20.468
N139 X23.468
N140 M09
N141 M05
N142 G00 G91 G28 Z0.
N143 M01

Originally Posted by Superman Usually an R value defines the start of the cycle, called the retract plane the initial level is the Z plane the tool is at before processing the drill cycle ie G0 X0 Y0 Z2.0 ( initial level ) G83 Z-1.5 R0.1 Q0.2 F4.000 M98 ( rapids to Z0.1, feed to Z-1.5, rapid retract to Z2.) XY XY M99 --> stays down( rapids to Z0.1, feed to Z-1.5, rapid retract to Z0.1 ) XY --> stays down XY --> stays down XY M98 --> goto Z2 at cycle end XY M98 is to return to the initail level ---being Z2.0, to clear all after each hole M99 would make it go to Z0.1 after each hole --which would put you thru the clamps You can put the M code after each hole to cut out the high retracts, but prove it off 1st without the clamps. The M code is modal.

[Superman]

Yep
Sorry, it should have been G-code G98/G99

put a higher figure in on N132, so you can actually see the moves, and miss the clamps, even if it had a nut/stud above the clamp

The P is a dwell, (in seconds) ---not necessary if a zero time, so it can be omitted

another trick use incremental

N133 G83 G99 X5.468 Y2.062 Z-.575 R.1 Q.0938 P0. F15.
N134 G91 X3.
N135 X3.
N136 X3.
N137 X3.
N138 X3.
N139 X3.
G90 ( to set back to absolute )
G0 (or G80 will terminate the drillcycle)
G94 ( force feed/min )
N140 M09
N141 M05
N142 G00 G91 G28 Z0.

G94 should be stated before a toolchange, just in case you copy & paste and change it to a tap cycle and use a feed/rev (G95) in it. The next toolpath would travel very quick.

[Geof]

I am puzzled. My Haas Manual says M98 is Sub Program Call and M99 Sub Program Return or Loop. Possibly you mean G98 Canned Cycle Initial Poibt Return and G99 Canned Cycle R Plane Return.

When there are obstructions you should use G98 and set the Z position ahead of the drill cycle high enough to clear them and set R just above the work. The drill cycle will rapid down to R, peck the hole retracting to R and then return to the Z position before moving to the next hole.