R Less Than Z in Cycle in XY Plane
Hi I generated a g-code for my drilling work but ran to this error in mach3
"R Less Than Z in Cycle in XY Plane"
and i don't have a clue
this is parts of the g-code
G90 G94 G91.1 G40 G49 G17
G21
G0 Z15.00
M3
G4 P4.0
G98 G81 X0.00 Y0.00 R-6.00 Z0.00 F1000.0
X0.67 Y0.53
X0.88 Y1.12
X0.80 Y1.70
X1.41 Y2.16
X1.98 Y2.11
X2.38 Y1.62
X2.16 Y1.04
X2.75 Y1.04
X3.36 Y1.26
NOTE: When i change r to a bigger number than z instead of going down and drill and going up it goes up and moves in down
Re: R Less Than Z in Cycle in XY Plane
Re: R Less Than Z in Cycle in XY Plane
Re: R Less Than Z in Cycle in XY Plane
Your position when the drill cycle is called is Z15.0 and the holes goes to Z0.0, if you call a retracion at R-6.00 its makes no sense cause this position is under your start position and even under the bottom of your holes
What is your holes Z top and Z bottom ?
Re: R Less Than Z in Cycle in XY Plane
Quote:
Originally Posted by
lucaswalker
Your position when the drill cycle is called is Z15.0 and the holes goes to Z0.0, if you call a retracion at R-6.00 its makes no sense cause this position is under your start position and even under the bottom of your holes
What is your holes Z top and Z bottom ?
Thank you very much for responding
I changed z to z-15 but still the same error
and if i change numbers to R+6 and Z+15 it's just goes up and moves in down
what should i do to make it right?
Re: R Less Than Z in Cycle in XY Plane
Hi,
I don't know what G91.1 is doing ??
Try this;
G90 G0 Z15.
G98 G81 X0. Y0. R6. Z0. F----
X--- Y----
X--- Y----
Re: R Less Than Z in Cycle in XY Plane
Quote:
Originally Posted by
Heavy_Metal
Hi,
I don't know what G91.1 is doing ??
Try this;
G90 G0 Z15.
G98 G81 X0. Y0. R6. Z0. F----
X--- Y----
X--- Y----
Hello
Thank you for responding
I'v done that and it just doesn't move in z axis no more.
Re: R Less Than Z in Cycle in XY Plane
...R is the reference plane and Z is drill depth. Q is peck distances
N87 T5
N88 S2200 M03
N89 G00 G90 G54 X-146.05 Y-6.35
N90 G43 H5 Z2.54 M08
N91 G83 G98 X-146.05 Y-6.35 Z-15.504 R2.54 Q2.553 F447.04
N92 X-113.594
N93 X-81.139
N101 M09
N102 M05
N103 G53 Z0.
N104 G53 X0. Y0.
N105 M01
Re: R Less Than Z in Cycle in XY Plane
my problem is that if z axis is vertical and when negative goes up how can i drill with this g-code? it just doesn't makes sense
Re: R Less Than Z in Cycle in XY Plane
Quote:
Originally Posted by
mosator
my problem is that if z axis is vertical and when negative goes up how can i drill with this g-code? it just doesn't makes sense
...you do not have a G Code problem...you have a Z Axis backwards problem
Re: R Less Than Z in Cycle in XY Plane
I think you misunderstand how drill cycles works :
there is 3 key z position in the cycle :
1) the Z position when you call the cycle
2) the Z called during the Gxx command of the cycle, which is the depth
3) the R which is the retraction position, the position you will go back before doing a new cycle.
All this can be absolute (G90) or relative (G91) with respect to the initial point (1)
this could be a correct example of your code :
G90 G94 G91.1 G40 G49 G17
G21
G0 Z2.00
M3
G4 P4.0
G98 G81 X0.00 Y0.00 R2.0 Z-5.00 F1000.0
X0.67 Y0.53
X0.88 Y1.12
X0.80 Y1.70
X1.41 Y2.16
X1.98 Y2.11
X2.38 Y1.62
X2.16 Y1.04
X2.75 Y1.04
X3.36 Y1.26
Re: R Less Than Z in Cycle in XY Plane
Quote:
Originally Posted by
mosator
Thank you very much for responding
I changed z to z-15 but still the same error
and if i change numbers to R+6 and Z+15 it's just goes up and moves in down
what should i do to make it right?
You can't drill anything with your code like that
G90 G94 G91.1 G40 G49 G17
G21
G0 Z15.00 ( Z axis is above the part by 15mm )
M3
G4 P4.0
G98 G81 X0.00 Y0.00 R-6.00 Z0.00 F1000.0 ( Z0.0=the top of your part so your hole depth is 0.0 deep )
G81G98X0Y0Z-6 R15F1000. ( Now the R value only needs to be enough to clear your work so normally this would be around 3mm to 4 mm )
your Feed rate also is way to high also so start for a lower feed rate
G81G98X0Y0Z-6.0R4.F100.
X0.67 Y0.53
X0.88 Y1.12
X0.80 Y1.70
X1.41 Y2.16
X1.98 Y2.11
X2.38 Y1.62
X2.16 Y1.04
X2.75 Y1.04
X3.36 Y1.26