circular pattern while machined comes like polygon..!! any solution..??

[Anonymous]

I have tried smoothing and tolerance as low as 0.001mm, but output looks similar...what might be the problem, i'm using grbl controller with fusion 360.

[daniel_lyall]

More details please 

what is the Machine

What is the controller

model file

copy of G code file

[Anonymous]

I have attached the design file and nc file...

I'm using a custom designed CNC based on Openbuilds OX, with GRBL controller...

This is the g code

%
(corner)
(T1  D=8 CR=0 - ZMIN=-18 - flat end mill)
G90 G94
G17
G21

(2D Contour1)
M9
T1 M6
S10000 M3
G54
M9
G0 X179.649 Y48.354
Z15
Z5
G1 Z-1.2 F1920
X179.642 Y48.353 Z-1.304
X179.622 Y48.35 Z-1.407
X179.588 Y48.346 Z-1.506
X179.542 Y48.339 Z-1.6
X179.485 Y48.331 Z-1.687
X179.417 Y48.321 Z-1.766
X179.339 Y48.309 Z-1.835
X179.253 Y48.297 Z-1.893
X179.16 Y48.283 Z-1.939
X179.062 Y48.269 Z-1.973
X178.96 Y48.254 Z-1.993
X178.857 Y48.239 Z-2
X178.065 Y48.124
G3 X177.389 Y47.217 I0.115 J-0.792
G2 X179 Y25 I-152.389 J-22.217
G1 Y0
G2 X175 Y-4 I-4
G1 X0
G2 X-4 Y0 J4
G1 Y175
G2 X0 Y179 I4
G1 X25
G2 X177.389 Y47.217 J-154
G3 X178.296 Y46.54 I0.792 J0.115
G1 X179.088 Y46.656
X179.191 Y46.671 Z-1.993
X179.293 Y46.686 Z-1.973
X179.391 Y46.7 Z-1.939
X179.484 Y46.713 Z-1.893
X179.57 Y46.726 Z-1.835
X179.648 Y46.737 Z-1.766
X179.716 Y46.747 Z-1.687
X179.773 Y46.756 Z-1.6
X179.819 Y46.762 Z-1.506
X179.852 Y46.767 Z-1.407
X179.873 Y46.77 Z-1.304
X179.879 Y46.771 Z-1.2
G0 Z5
X179.649 Y48.354
G1 Z-3.2 F1920
X179.642 Y48.353 Z-3.304
X179.622 Y48.35 Z-3.407
X179.588 Y48.346 Z-3.506
X179.542 Y48.339 Z-3.6
X179.485 Y48.331 Z-3.687
X179.417 Y48.321 Z-3.766
X179.339 Y48.309 Z-3.835
X179.253 Y48.297 Z-3.893
X179.16 Y48.283 Z-3.939
X179.062 Y48.269 Z-3.973
X178.96 Y48.254 Z-3.993
X178.857 Y48.239 Z-4
X178.065 Y48.124
G3 X177.389 Y47.217 I0.115 J-0.792
G2 X179 Y25 I-152.389 J-22.217
G1 Y0
G2 X175 Y-4 I-4
G1 X0
G2 X-4 Y0 J4
G1 Y175
G2 X0 Y179 I4
G1 X25
G2 X177.389 Y47.217 J-154
G3 X178.296 Y46.54 I0.792 J0.115
G1 X179.088 Y46.656
X179.191 Y46.671 Z-3.993
X179.293 Y46.686 Z-3.973
X179.391 Y46.7 Z-3.939
X179.484 Y46.713 Z-3.893
X179.57 Y46.726 Z-3.835
X179.648 Y46.737 Z-3.766
X179.716 Y46.747 Z-3.687
X179.773 Y46.756 Z-3.6
X179.819 Y46.762 Z-3.506
X179.852 Y46.767 Z-3.407
X179.873 Y46.77 Z-3.304
X179.879 Y46.771 Z-3.2
G0 Z5
X179.649 Y48.354
G1 Z-5.2 F1920
X179.642 Y48.353 Z-5.304
X179.622 Y48.35 Z-5.407
X179.588 Y48.346 Z-5.506
X179.542 Y48.339 Z-5.6
X179.485 Y48.331 Z-5.687
X179.417 Y48.321 Z-5.766
X179.339 Y48.309 Z-5.835
X179.253 Y48.297 Z-5.893
X179.16 Y48.283 Z-5.939
X179.062 Y48.269 Z-5.973
X178.96 Y48.254 Z-5.993
X178.857 Y48.239 Z-6
X178.065 Y48.124
G3 X177.389 Y47.217 I0.115 J-0.792
G2 X179 Y25 I-152.389 J-22.217
G1 Y0
G2 X175 Y-4 I-4
G1 X0
G2 X-4 Y0 J4
G1 Y175
G2 X0 Y179 I4
G1 X25
G2 X177.389 Y47.217 J-154
G3 X178.296 Y46.54 I0.792 J0.115
G1 X179.088 Y46.656
X179.191 Y46.671 Z-5.993
X179.293 Y46.686 Z-5.973
X179.391 Y46.7 Z-5.939
X179.484 Y46.713 Z-5.893
X179.57 Y46.726 Z-5.835
X179.648 Y46.737 Z-5.766
X179.716 Y46.747 Z-5.687
X179.773 Y46.756 Z-5.6
X179.819 Y46.762 Z-5.506
X179.852 Y46.767 Z-5.407
X179.873 Y46.77 Z-5.304
X179.879 Y46.771 Z-5.2
G0 Z5
X179.649 Y48.354
G1 Z-7.2 F1920
X179.642 Y48.353 Z-7.304
X179.622 Y48.35 Z-7.407
X179.588 Y48.346 Z-7.506
X179.542 Y48.339 Z-7.6
X179.485 Y48.331 Z-7.687
X179.417 Y48.321 Z-7.766
X179.339 Y48.309 Z-7.835
X179.253 Y48.297 Z-7.893
X179.16 Y48.283 Z-7.939
X179.062 Y48.269 Z-7.973
X178.96 Y48.254 Z-7.993
X178.857 Y48.239 Z-8
X178.065 Y48.124
G3 X177.389 Y47.217 I0.115 J-0.792
G2 X179 Y25 I-152.389 J-22.217
G1 Y0
G2 X175 Y-4 I-4
G1 X0
G2 X-4 Y0 J4
G1 Y175
G2 X0 Y179 I4
G1 X25
G2 X177.389 Y47.217 J-154
G3 X178.296 Y46.54 I0.792 J0.115
G1 X179.088 Y46.656
X179.191 Y46.671 Z-7.993
X179.293 Y46.686 Z-7.973
X179.391 Y46.7 Z-7.939
X179.484 Y46.713 Z-7.893
X179.57 Y46.726 Z-7.835
X179.648 Y46.737 Z-7.766
X179.716 Y46.747 Z-7.687
X179.773 Y46.756 Z-7.6
X179.819 Y46.762 Z-7.506
X179.852 Y46.767 Z-7.407
X179.873 Y46.77 Z-7.304
X179.879 Y46.771 Z-7.2
G0 Z5
X179.649 Y48.354
G1 Z-9.2 F1920
X179.642 Y48.353 Z-9.304
X179.622 Y48.35 Z-9.407
X179.588 Y48.346 Z-9.506
X179.542 Y48.339 Z-9.6
X179.485 Y48.331 Z-9.687
X179.417 Y48.321 Z-9.766
X179.339 Y48.309 Z-9.835
X179.253 Y48.297 Z-9.893
X179.16 Y48.283 Z-9.939
X179.062 Y48.269 Z-9.973
X178.96 Y48.254 Z-9.993
X178.857 Y48.239 Z-10
X178.065 Y48.124
G3 X177.389 Y47.217 I0.115 J-0.792
G2 X179 Y25 I-152.389 J-22.217
G1 Y0
G2 X175 Y-4 I-4
G1 X0
G2 X-4 Y0 J4
G1 Y175
G2 X0 Y179 I4
G1 X25
G2 X177.389 Y47.217 J-154
G3 X178.296 Y46.54 I0.792 J0.115
G1 X179.088 Y46.656
X179.191 Y46.671 Z-9.993
X179.293 Y46.686 Z-9.973
X179.391 Y46.7 Z-9.939
X179.484 Y46.713 Z-9.893
X179.57 Y46.726 Z-9.835
X179.648 Y46.737 Z-9.766
X179.716 Y46.747 Z-9.687
X179.773 Y46.756 Z-9.6
X179.819 Y46.762 Z-9.506
X179.852 Y46.767 Z-9.407
X179.873 Y46.77 Z-9.304
X179.879 Y46.771 Z-9.2
G0 Z5
X179.649 Y48.354
G1 Z-11.2 F1920
X179.642 Y48.353 Z-11.304
X179.622 Y48.35 Z-11.407
X179.588 Y48.346 Z-11.506
X179.542 Y48.339 Z-11.6
X179.485 Y48.331 Z-11.687
X179.417 Y48.321 Z-11.766
X179.339 Y48.309 Z-11.835
X179.253 Y48.297 Z-11.893
X179.16 Y48.283 Z-11.939
X179.062 Y48.269 Z-11.973
X178.96 Y48.254 Z-11.993
X178.857 Y48.239 Z-12
X178.065 Y48.124
G3 X177.389 Y47.217 I0.115 J-0.792
G2 X179 Y25 I-152.389 J-22.217
G1 Y0
G2 X175 Y-4 I-4
G1 X0
G2 X-4 Y0 J4
G1 Y175
G2 X0 Y179 I4
G1 X25
G2 X177.389 Y47.217 J-154
G3 X178.296 Y46.54 I0.792 J0.115
G1 X179.088 Y46.656
X179.191 Y46.671 Z-11.993
X179.293 Y46.686 Z-11.973
X179.391 Y46.7 Z-11.939
X179.484 Y46.713 Z-11.893
X179.57 Y46.726 Z-11.835
X179.648 Y46.737 Z-11.766
X179.716 Y46.747 Z-11.687
X179.773 Y46.756 Z-11.6
X179.819 Y46.762 Z-11.506
X179.852 Y46.767 Z-11.407
X179.873 Y46.77 Z-11.304
X179.879 Y46.771 Z-11.2
G0 Z5
X179.649 Y48.354
G1 Z-13.2 F1920
X179.642 Y48.353 Z-13.304
X179.622 Y48.35 Z-13.407
X179.588 Y48.346 Z-13.506
X179.542 Y48.339 Z-13.6
X179.485 Y48.331 Z-13.687
X179.417 Y48.321 Z-13.766
X179.339 Y48.309 Z-13.835
X179.253 Y48.297 Z-13.893
X179.16 Y48.283 Z-13.939
X179.062 Y48.269 Z-13.973
X178.96 Y48.254 Z-13.993
X178.857 Y48.239 Z-14
X178.065 Y48.124
G3 X177.389 Y47.217 I0.115 J-0.792
G2 X179 Y25 I-152.389 J-22.217
G1 Y0
G2 X175 Y-4 I-4
G1 X0
G2 X-4 Y0 J4
G1 Y175
G2 X0 Y179 I4
G1 X25
G2 X177.389 Y47.217 J-154
G3 X178.296 Y46.54 I0.792 J0.115
G1 X179.088 Y46.656
X179.191 Y46.671 Z-13.993
X179.293 Y46.686 Z-13.973
X179.391 Y46.7 Z-13.939
X179.484 Y46.713 Z-13.893
X179.57 Y46.726 Z-13.835
X179.648 Y46.737 Z-13.766
X179.716 Y46.747 Z-13.687
X179.773 Y46.756 Z-13.6
X179.819 Y46.762 Z-13.506
X179.852 Y46.767 Z-13.407
X179.873 Y46.77 Z-13.304
X179.879 Y46.771 Z-13.2
G0 Z5
X179.649 Y48.354
G1 Z-15.2 F1920
X179.642 Y48.353 Z-15.304
X179.622 Y48.35 Z-15.407
X179.588 Y48.346 Z-15.506
X179.542 Y48.339 Z-15.6
X179.485 Y48.331 Z-15.687
X179.417 Y48.321 Z-15.766
X179.339 Y48.309 Z-15.835
X179.253 Y48.297 Z-15.893
X179.16 Y48.283 Z-15.939
X179.062 Y48.269 Z-15.973
X178.96 Y48.254 Z-15.993
X178.857 Y48.239 Z-16
X178.065 Y48.124
G3 X177.389 Y47.217 I0.115 J-0.792
G2 X179 Y25 I-152.389 J-22.217
G1 Y0
G2 X175 Y-4 I-4
G1 X0
G2 X-4 Y0 J4
G1 Y175
G2 X0 Y179 I4
G1 X25
G2 X177.389 Y47.217 J-154
G3 X178.296 Y46.54 I0.792 J0.115
G1 X179.088 Y46.656
X179.191 Y46.671 Z-15.993
X179.293 Y46.686 Z-15.973
X179.391 Y46.7 Z-15.939
X179.484 Y46.713 Z-15.893
X179.57 Y46.726 Z-15.835
X179.648 Y46.737 Z-15.766
X179.716 Y46.747 Z-15.687
X179.773 Y46.756 Z-15.6
X179.819 Y46.762 Z-15.506
X179.852 Y46.767 Z-15.407
X179.873 Y46.77 Z-15.304
X179.879 Y46.771 Z-15.2
G0 Z5
X179.649 Y48.354
G1 Z-17.2 F1920
X179.642 Y48.353 Z-17.304
X179.622 Y48.35 Z-17.407
X179.588 Y48.346 Z-17.506
X179.542 Y48.339 Z-17.6
X179.485 Y48.331 Z-17.687
X179.417 Y48.321 Z-17.766
X179.339 Y48.309 Z-17.835
X179.253 Y48.297 Z-17.893
X179.16 Y48.283 Z-17.939
X179.062 Y48.269 Z-17.973
X178.96 Y48.254 Z-17.993
X178.857 Y48.239 Z-18
X178.065 Y48.124
G3 X177.389 Y47.217 I0.115 J-0.792
G2 X179 Y25 I-152.389 J-22.217
G1 Y0
G2 X175 Y-4 I-4
G1 X139.25
Z-16
X123.25
Z-18 F30
X51.75 F1920
Z-16
X35.75
Z-18 F30
X0 F1920
G2 X-4 Y0 J4
G1 Y35.75
Z-16
Y51.75
Z-18 F30
Y123.25 F1920
Z-16
Y139.25
Z-18 F30
Y175 F1920
G2 X0 Y179 I4
G1 X25
G2 X57.077 Y175.622 J-154
G1 Z-16
G2 X72.532 Y171.481 I-32.077 J-150.622
G1 Z-18 F30
G2 X128.091 Y139.404 I-47.532 J-146.481 F1920
G1 Z-16
G2 X139.404 Y128.091 I-103.091 J-114.404
G1 Z-18 F30
G2 X171.481 Y72.532 I-114.404 J-103.091 F1920
G1 Z-16
G2 X175.622 Y57.077 I-146.481 J-47.532
G1 Z-18 F30
G2 X177.389 Y47.217 I-150.622 J-32.077 F1920
G3 X178.296 Y46.54 I0.792 J0.115
G1 X179.088 Y46.656
X179.191 Y46.671 Z-17.993
X179.293 Y46.686 Z-17.973
X179.391 Y46.7 Z-17.939
X179.484 Y46.713 Z-17.893
X179.57 Y46.726 Z-17.835
X179.648 Y46.737 Z-17.766
X179.716 Y46.747 Z-17.687
X179.773 Y46.756 Z-17.6
X179.819 Y46.762 Z-17.506
X179.852 Y46.767 Z-17.407
X179.873 Y46.77 Z-17.304
X179.879 Y46.771 Z-17.2
G0 Z15
M9
M30
%

[daniel_lyall]

Can you post the .f3d file Go to File -> Export and save as a .F3D Archive File and attach it to your next post

[Anonymous]

I have attached the fusion file.

[daniel_lyall]

There's no toolpaths in that file I need to see the toolpath you set to have a idea whats wrong.

[Anonymous]

This file has the toolpath on it.

[Laurens-3DTechDraw]

That looks like a machine control issue.

[Stuart-H]

or maybe machine rigidity 

just a thought 

[daniel_lyall]

Going far too fast for a machine of that size over 1900 mm/m it will be ramming the cutter through the material and not keeping up with the code, that's the common reasion for grbl going nana. 

[Anonymous]

sorry for replying late, I have manually written code and tested, I even tried sketchucam(plugin for sketchup) ...I dont have issues with that, but while I generate toolpath from fusion it comes like a polygon

.

.

[daniel_lyall]

is it lemons for lemons with the speeds and feeds with other programs

[Anonymous]

Yeah..Didn't changed any settings...!!!

For circular profile only i'm having this problem.

[daniel_lyall]

Try going the other way with tolerances smoothing, nothing stands out other than your going very fast for that size and type of machine.

If it's cutting to size with other programs at the same feed, speeds, depth of cut and width of cut that may be fine.

The other thing you can try is setting feed optimization, 

[Anonymous]

I'll give a try of what you said

[Anonymous · Accepted solution]

Rectified the problem... I was using grbl 0.9, Now updated it to 1.1 and  I used this Post Processor

https://github.com/Strooom/GRBL-Post-Processor

[daniel_lyall]

Good stuff.