Hello Guest it is March 28, 2024, 07:40:53 AM

Author Topic: stuttering arcs  (Read 1693 times)

0 Members and 1 Guest are viewing this topic.

stuttering arcs
« on: July 17, 2021, 05:44:29 PM »
for the life of me i cant find why when cutting radius my machine starts stuttering around some arcs and others seem fine please if anyone can help me figure this out it would be great. windows 1064bit ethernet smoothstepper with recommended mach3 version and plugin. here is sample of gcode of most recent project where the problem happens around outside edge but not in the center

( Pocket 5 )
( File created: Saturday July 17 2021 - 04:22 PM)
( for Mach2/3 from Vectric )
( Material Size)
( X= 22.000, Y= 9.000, Z= 1.347)
()
(Toolpaths used in this file:)
(Pocket 5)
(Tools used in this file: )
(1 = End Mill {1/4"})
N100G00G20G17G90G40G49G80
N110G70G91.1
N120T1M06
N130 (End Mill {1/4"})
N140G00G43Z0.8000H1
N150S16000M03
N160(Toolpath:- Pocket 5)
N170()
N180G94
N190X0.0000Y0.0000F100.0
N200G00X1.1935Y2.3142Z0.2000
N210G1Z-0.1250F45.0
N220G1X1.1691Y2.3629F100.0
N230G1X1.1485Y2.4066
N240G1X1.1290Y2.4509
N250G1X1.1105Y2.4957
N260G1X1.0930Y2.5410
N270G1X1.0766Y2.5869
N280G1X1.0612Y2.6333
N290G1X1.0470Y2.6803
N300G1X1.0338Y2.7277
N310G1X1.0217Y2.7756
N320G1X1.0108Y2.8240
N330G1X1.0010Y2.8728
N340G1X0.9924Y2.9222
N350G1X0.9850Y2.9720
N360G1X0.9787Y3.0222
N370G1X0.9735Y3.0741
N380G1X0.9683Y3.1482
N390G1X0.9658Y3.2221
N400G1X0.9659Y3.2955
N410G1X0.9687Y3.3683
N420G1X0.9740Y3.4403
N430G1X0.9819Y3.5117
N440G1X0.9922Y3.5824
N450G1X1.0050Y3.6523
N460G1X1.0202Y3.7215
N470G1X1.0377Y3.7898
N480G1X1.0576Y3.8572
N490G1X1.0797Y3.9237
N500G1X1.1041Y3.9893
N510G1X1.1307Y4.0539
N520G1X1.1595Y4.1174
N530G1X1.1924Y4.1838
N540G3X1.2392Y4.5211I-0.4685J0.2369
N550G3X1.5437Y4.6700I-0.0661J0.5208
N560G1X1.5830Y4.7093
N570G1X1.6188Y4.7432
N580G1X1.6553Y4.7763
N590G1X1.6926Y4.8084
N600G1X1.7307Y4.8397
N610G1X1.7696Y4.8701
N620G1X1.8092Y4.8996
N630G1X1.8495Y4.9281
N640G1X1.8906Y4.9556
N650G1X1.9324Y4.9822
N660G1X1.9748Y5.0077
N670G1X2.0179Y5.0322
N680G1X2.0616Y5.0557
N690G1X2.1060Y5.0782
N700G1X2.1510Y5.0996
N710G1X2.1966Y5.1199
N720G1X2.2429Y5.1391
N730G1X2.2896Y5.1572
N740G1X2.3370Y5.1741
N750G1X2.3849Y5.1899
N760G1X2.4334Y5.2046
N770G1X2.4824Y5.2180
N780G1X2.5319Y5.2303
N790G1X2.5819Y5.2414
N800G1X2.6325Y5.2512
N810G1X2.6835Y5.2598
N820G1X2.7351Y5.2671
N830G1X2.7871Y5.2731
N840G1X2.8396Y5.2779
N850G1X2.8926Y5.2813
N860G1X2.9461Y5.2833
N870G1X3.0034Y5.2841
N880G1X5.1156
N890G3X5.5000Y5.4514I0.0000J0.5250
N900G3X5.8843Y5.2841I0.3844J0.3576
N910G1X6.6696
N920G3X5.5695Y3.2500I1.3304J-2.0341
N930G3X6.6696Y1.2159I2.4305J0.0000
N940G1X5.8843
N950G3X5.5000Y1.0486I0.0000J-0.5250
N960G3X5.1156Y1.2159I-0.3844J-0.3576
N970G1X3.0034
N980G1X2.9468Y1.2167

Offline Tweakie.CNC

*
  • *
  •  9,196 9,196
  • Super Kitty
    • View Profile
Re: stuttering arcs
« Reply #1 on: July 18, 2021, 03:22:11 AM »
The outside curve is not an arc, it comprises a series of straight lines. The inside curve is a true arc so this will run smother.

You need to look to your CAD/CAM software and where possible convert any curves to arcs where possible.

Tweakie.
PEACE
Re: stuttering arcs
« Reply #2 on: July 19, 2021, 04:16:17 PM »
i use vectric aspire 10 and haven't been able to find any sort of options to modify that setting. the file is avid cnc dust shoe that they  have available to download for vectric. if you know where i may find such setting let me know. and thank you for your response

Offline Tweakie.CNC

*
  • *
  •  9,196 9,196
  • Super Kitty
    • View Profile
Re: stuttering arcs
« Reply #3 on: July 20, 2021, 12:33:23 AM »
Quote
if you know where i may find such setting let me know.

For Vectric Aspire:-  Edit Objects : Curve Fit

Tweakie.
PEACE

Offline ZASto

*
  •  423 423
    • View Profile
Re: stuttering arcs
« Reply #4 on: July 20, 2021, 04:44:11 AM »
@Tweakie: All vectors are curves, just downloaded the file and checked.

@ostindd: If you do what Tweakie suggested, you will end up with a lot of arcs when you regenerate toolpaths,

Original toolpath (2811 lines of text) this is just the beginning:

Code: [Select]
(Toolpaths used in this file:)
(Outer Profile w/Tabs)
(Tools used in this file: )
(1 = End Mill {0.25 inch})
N100G00G21G17G90G40G49G80
N110G71G91.1
N120T1M06
N130 (End Mill {0.25 inch})
N140G00G43Z20.320H1
N150S16500M03
N160(Toolpath:- Outer Profile w/Tabs)
N170()
N180G94
N190X0.000Y0.000F7620.0
N200G00X271.375Y82.550Z5.080
N210G1Z-3.175F762.0
N220G1X271.361Y81.185F7620.0
N230G1X271.320Y79.822
N240G1X271.252Y78.463
N250G1X271.157Y77.107
N260G1X271.036Y75.755
N270G1X270.887Y74.408
N280G1X270.712Y73.065
N290G1X270.510Y71.727
N300G1X270.283Y70.394
N310G1X270.029Y69.067
N320G1X269.748Y67.747
N330G1X269.442Y66.433
N340G1X269.110Y65.126
N350G1X268.753Y63.826
N360G1X268.370Y62.534
N370G1X267.961Y61.250
N380G1X267.528Y59.974
N390G1X267.069Y58.707
N400G1X266.585Y57.450
N410G1X266.076Y56.201
N420G1X265.543Y54.963
N430G1X264.985Y53.736
N440G1X264.402Y52.518
N450G1X263.795Y51.312
N460G1X263.164Y50.118
N470G1X262.509Y48.935
N480G1X261.830Y47.765
N490G1X261.127Y46.607
N500G1X260.400Y45.462
N510G1X259.649Y44.330
N520G1X259.589Y44.243
N530G1X259.858Y43.870
N540G1X260.229Y43.294
N550G1X260.570Y42.697
N560G1X260.879Y42.081
N570G1X261.157Y41.446
N580G1X261.401Y40.794
N590G1X261.610Y40.125
N600G1X261.784Y39.442
N610G1X261.921Y38.745
N620G1X262.020Y38.036
N630G1X262.080Y37.316
N640G1X262.098Y36.676

Regenerated (419 ilnes of code  :) )

Code: [Select]
( Outer Profile w_Tabs_Arcs )
( File created: Tuesday July 20 2021 - 10:39 AM)
( for Mach2/3 from Vectric )
( Material Size)
( X= 279.400, Y= 165.100, Z= 25.400)
()
(Toolpaths used in this file:)
(Outer Profile w/Tabs)
(Tools used in this file: )
(1 = End Mill {0.25 inch})
N100G00G21G17G90G40G49G80
N110G71G91.1
N120T1M06
N130 (End Mill {0.25 inch})
N140G00G43Z20.320H1
N150S16500M03
N160(Toolpath:- Outer Profile w/Tabs)
N170()
N180G94
N190X0.000Y0.000F7620.0
N200G00X259.436Y44.166Z5.080
N210G1Z-3.175F762.0
N220G2X261.475Y39.818I-13.013J-8.754F7620.0
N230G2X258.310Y27.440I-12.023J-3.520
N240G2X245.932Y24.275I-8.859J8.859
N250G2X241.585Y26.313I4.406J15.051
N260G2X225.710Y18.387I-45.503J71.281
N270G2X208.685Y14.596I-22.084J59.040
N280G2X196.612Y14.164I-10.863J134.919
N290G1X152.104Y14.374
N300G2X147.417Y7.441I-13.199J3.873
N310G2X128.742Y10.672I-7.885J10.010
N320G2X127.417Y13.634I9.816J6.168
N330G1X127.221Y14.375
N340G1X76.800Y14.259
N350G2X32.404Y30.304I-0.299J68.619
N360G1X29.882Y32.580
N370G1X29.331Y33.113
N380G2X21.953Y31.816I-6.129J13.240
N390G2X10.566Y44.591I1.066J12.413
N400G2X12.123Y50.231I12.287J-0.356
N410G2X14.574Y53.594I15.150J-8.467
N420G2X10.296Y65.939I86.179J36.778
N430G2X8.563Y91.297I63.134J17.053
N440G2X10.811Y101.596I59.795J-7.655
N450G2X14.550Y111.534I88.305J-27.551
N460G2X12.232Y114.697I12.626J11.683
N470G2X11.654Y125.799I10.744J6.125
N480G2X22.022Y133.247I11.486J-5.049
N490G2X29.374Y131.964I1.284J-14.351
N500G2X39.464Y139.743I63.481J-71.901
N510G2X62.224Y149.297I35.834J-53.478
N520G2X76.239Y150.733I13.994J-67.468
N530G1X127.309Y150.725
N540G2X131.801Y157.498I13.311J-3.954
N550G2X150.228Y155.070I8.078J-9.826
N560G2X151.838Y151.862I-9.438J-6.747
N570G1X152.161Y150.725
N580G1X203.873Y150.648
Make no mistake between my personality and my attitude.
My personality is who I am.
My attitude depends on who you are.