Cutter Compensation Problem
19 Sep 2013 18:35 #39020
by BigJohnT
Replied by BigJohnT on topic Cutter Compensation Problem
Yep, here is an example.
JT
G20 F25
G0 X1 Y1
Z0.1
G41.1 D0.250
G3 X1 Y0.625 I0 J-0.1875
G3 X1 Y0.625 Z-0.2 I0 J0.375 P3
M0
G3 X1 Y0.625 Z-0.4 I0 J0.375
G3 X1 Y0.625 Z-0.5 I0 J0.375 P5
G40
G1 X1 Y1
G0 Z0.1
M2JT
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19 Sep 2013 23:47 #39031
by karl
Replied by karl on topic Cutter Compensation Problem
Thank you JT.
This program worked after I removed the (P3 and P5)
Because of the .1875 radius for the lead in, I still can't use a cutter that is larger than the radius of the finished hole.
In order to use a larger cutter (say 5/8"), I would have to start with the cutter offset from the hole centerline. Then incorporate cutter comp with a larger radius move above the hole. Then run the rest of your program as it is.
G20 F25
G0 X0 Y.265
Z0.1
G41.1 D0.625 ( largest possible cutter dia is .640)
G3 X0 Y-0.375 I0 J-.320
G3 X0 Y-0.375 Z-0.2 I0 J0.375
G3 X0 Y-0.375 Z-0.4 I0 J0.375
G3 X0 Y-0.375 Z-0.5 I0 J0.375
G3 X0 Y-0.375 Z-0.5 I0 J0.375
G40
G1 X0 Y0
G0 Z0.1
In the end, a G12 G13 code would be much easier. Until one is available, this will work.
Thank you for your time and knowlege.
Karl
This program worked after I removed the (P3 and P5)
Because of the .1875 radius for the lead in, I still can't use a cutter that is larger than the radius of the finished hole.
In order to use a larger cutter (say 5/8"), I would have to start with the cutter offset from the hole centerline. Then incorporate cutter comp with a larger radius move above the hole. Then run the rest of your program as it is.
G20 F25
G0 X0 Y.265
Z0.1
G41.1 D0.625 ( largest possible cutter dia is .640)
G3 X0 Y-0.375 I0 J-.320
G3 X0 Y-0.375 Z-0.2 I0 J0.375
G3 X0 Y-0.375 Z-0.4 I0 J0.375
G3 X0 Y-0.375 Z-0.5 I0 J0.375
G3 X0 Y-0.375 Z-0.5 I0 J0.375
G40
G1 X0 Y0
G0 Z0.1
In the end, a G12 G13 code would be much easier. Until one is available, this will work.
Thank you for your time and knowlege.
Karl
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20 Sep 2013 00:09 #39033
by BigJohnT
Replied by BigJohnT on topic Cutter Compensation Problem
If your using a cutter that will cut the hole in one pass I don't see where G12/13 is any different than using G2/3 for a single depth. If the hole is big enough and you can cut the full depth with one pass then G12/13 (spiral) would be useful. If you do this often enough you should look into adding ngcgui and program a subroutine for this.
Also have you looked at the Simple G code Generators on the Wiki? Specifically the Counter Bore one.
JT
Also have you looked at the Simple G code Generators on the Wiki? Specifically the Counter Bore one.
JT
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