tool radius compensation

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3 years 8 months ago #265265 by Routercnc
hello everyone, I'm trying to machine a hole with a diameter of 20mm, but linuxcnc is not compensating for the tool's radius, it's machining a hole with a diameter of 26mmI set the tool radius in the Tool table 6mm.tool 12mm.
how to solve it?
thanks 
G17 G21 G40 G90 G94
T1 M6
G54 S5000 M3 F800
G0 Z30
X0 Y0
Z10
G1 Z0
G1 G41 D1 X10
G2 X10 Y0 I-10 J0 Z-5 P5
G1 G40 X0 Y0
G1 G41 X10 
G3 X10 Y0 I-10 J0
G1 G40 X0 Y0
G0Z30
M30
 

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3 years 8 months ago #265297 by tommylight
Replied by tommylight on topic tool radius compensation
Pretty sure the tool table needs diameter, not radius of tool.
Try that and report back as it's been several years that i have not used a mill.
Second result is from the documents, others are from the forum, regarding G41, G42 tool compensation.
www.google.com/search?q=g41+site%3Alinux...sclient=gws-wiz-serp

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3 years 8 months ago #265501 by Routercnc
Replied by Routercnc on topic tool radius compensation
linuxcnc uses tool radius, I put the tool diameter in the tool table linuxcnc gives the following message "arc movement in a concave corner cannot be achieved by the tool without damaging the material"

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3 years 8 months ago #265502 by MaHa
Replied by MaHa on topic tool radius compensation
From my doku, about cuttercompensation. The machining diameter must be >= 2.25 x tooldiameter. It seems this didn't change in the meantime.
G41G42 LEAD IN '2.25 x ToolDia' minLIMIT
 

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3 years 8 months ago #265505 by tommylight
Replied by tommylight on topic tool radius compensation

linuxcnc uses tool radius, ....

It does not, it uses diameter, see attached:

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3 years 8 months ago #265509 by Routercnc
Replied by Routercnc on topic tool radius compensation
I inserted the tool diameter into the tool table and the following message appeared ... "Arch movement in a concave corner cannot be achieved by the tool without damaging the material"

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3 years 8 months ago #265513 by MaHa
Replied by MaHa on topic tool radius compensation
Before i tried to explain, linuxcnc needs (too)much space for lead-in when use G41 g42. I tried your code, and any cutter larger than 10mm will generate this error. Easy to test yourself. Try entry in tooltable Dia 10.001 vs. 10.00


 

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3 years 8 months ago #265563 by Routercnc
Replied by Routercnc on topic tool radius compensation
I changed the diameter of the tool to 10 but it continues to make the hole larger than the measurement of 20mm " 21.68mm... I increased the diameter of the tool to 11mm it did not accept it linuxcnc gave an error

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3 years 8 months ago #265570 by MaHa
Replied by MaHa on topic tool radius compensation
If your tool has exactly 12mm diameter, you can try toolpath toolcenterpoint and it must result a 20mm diameter
Code:
G17 G21 G40 G90 G94 T1 M6 G54 S5000 M3 F800 G0 Z30 X0 Y0 Z10 G1 Z0 G1 X4 G2 X4 Y0 I-4 J0 Z-5 P5 G3 X4 Y0 I-4 J0 G1 X0 Y0 G0Z30 M30

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3 years 8 months ago #265572 by Routercnc
Replied by Routercnc on topic tool radius compensation
I made the holes that way... but with the wear of the tool I'll always have to correct it in the program so I wanted to try using tool radius compensation... I'm going to abandon G41, it doesn't work using it here

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