Choppy motion - VCarve?

[cnckeith]

screen shots of tecknic software settings as well, please add them to the photo album.

[cnckeith]

thanks for posting the report.

all of us can help you get to the point where the machine is cutting great with good info. looking forward to the photos etc.

looking at the report.zip
first thing i notice is

1.) that you are running v4.64 cnc12. please update to the latest version v4.82 so we are all using the same software.
update instructions, release notes and free download is here.
https://www.centroidcnc.com/centroid_di ... loads.html

2.) Next thing which you are not going to like....is the machine is setup mechanically to make cabinet parts not for 3D surfacing or V carve cutting. the overall turns ratio of .8842 revs/in is way too low to get the good results you are hoping for. while you can get a router at this setting to V carve "ok" for best results this needs changed.

CNC Router Sweet Spot for good performance in all cases.

- Overall Turns Ratio for routers is 1.5 to 2.5 turns of the AXIS MOTOR yields 1" of table/gantry movement.

i'll look more at the report and files when i get time, can you send the v carve format files as well? maybe one of the other guru here can look at those items and comment.

[MSimeone]

Keith,
I'll attach the motor files as .txt files. They can be opened using notepad and all parameters can be read, I am assuming this is the easiest way. Note, there is an XR and XL, right and left X axis motors.
I honestly don't do any V-carving. I use the machine for 80% cabinet work, the other 20% is either millwork or slab flattening. I appreciate your input on the turns ratio however. I am assuming the only way to really improve that is through greater reduction pulleys.
I'll get on the CNC12 update, thank you for the heads up on that!
Mike

[MSimeone]

Here is a link to photos:
Warning: Poster, Album not found for https://photos.app.goo.gl/EU23v5VKsQk1shxZ8. Please check the URL by editing the post and try again.

[EastMemphis]

I am, however, leaning more and more toward a motor tuning issue.

You mentioned the motors were tuned by Teknic. Did they do it on your machine? Thanks.

[MSimeone]

I am, however, leaning more and more toward a motor tuning issue.

You mentioned the motors were tuned by Tecknic. Did they do it on your machine? Thanks.

They did. It was a bit of a dance, I needed two separate computers - 1 hooked to each X axis motor - so they could monitor both simultaneously.

[cnckeith]

thanks for photos. can you take covers off of servo motor area? is there any gear reduction from the axis motors to the rack pinion?

[cnckeith]

Profile 1.cnc

look how vectric is outputting g code for such simple geometry.. lots of short moves (like a 3D file or v varve file would be)

N0330 G0 X61.0197 Y24.9990 Z0.2000
N0340 G1 Z0.0000 F30
N0350 G1 X60.9922 Y24.8654 Z-0.0021
N0360 G1 X60.9640 Y24.7321 Z-0.0043
N0370 G1 X60.9351 Y24.5990 Z-0.0064
N0380 G1 X60.9055 Y24.4662 Z-0.0085
N0390 G1 X60.8751 Y24.3337 Z-0.0106
N0400 G1 X60.8441 Y24.2014 Z-0.0128
N0410 G1 X60.8124 Y24.0694 Z-0.0149
N0420 G1 X60.7799 Y23.9377 Z-0.0170
N0430 G1 X60.7468 Y23.8062 Z-0.0191
N0440 G1 X60.7130 Y23.6751 Z-0.0212
N0450 G1 X60.6785 Y23.5442 Z-0.0234
N0460 G1 X60.6433 Y23.4136 Z-0.0255
N0470 G1 X60.6074 Y23.2832 Z-0.0276
N0480 G1 X60.5709 Y23.1532 Z-0.0297
N0490 G1 X60.5336 Y23.0234 Z-0.0318
N0500 G1 X60.4957 Y22.8940 Z-0.0339
N0510 G1 X60.4571 Y22.7648 Z-0.0360
N0520 G1 X60.4178 Y22.6359 Z-0.0381
N0530 G1 X60.3778 Y22.5073 Z-0.0402
N0540 G1 X60.3372 Y22.3791 Z-0.0423
N0550 G1 X60.2959 Y22.2511 Z-0.0444
N0560 G1 X60.2539 Y22.1234 Z-0.0465
N0570 G1 X60.2113 Y21.9960 Z-0.0486
N0580 G1 X60.1680 Y21.8689 Z-0.0507
N0590 G1 X60.1240 Y21.7421 Z-0.0528
N0600 G1 X60.0794 Y21.6157 Z-0.0549
N0610 G1 X60.0341 Y21.4895 Z-0.0570
N0620 G1 X59.9882 Y21.3637 Z-0.0591
N0630 G1 X59.9416 Y21.2382 Z-0.0612
N0640 G1 X59.9121 Y21.1599 Z-0.0625
N0650 G1 X59.9416 Y21.2382 Z-0.0638
N0660 G1 X59.9882 Y21.3637 Z-0.0659
N0670 G1 X60.0341 Y21.4895 Z-0.0680
N0680 G1 X60.0794 Y21.6157 Z-0.0701
N0690 G1 X60.1240 Y21.7421 Z-0.0722
N0700 G1 X60.1680 Y21.8689 Z-0.0743
N0710 G1 X60.2113 Y21.9960 Z-0.0764
N0720 G1 X60.2539 Y22.1234 Z-0.0785
N0730 G1 X60.2959 Y22.2511 Z-0.0806
N0740 G1 X60.3372 Y22.3791 Z-0.0827
N0750 G1 X60.3778 Y22.5073 Z-0.0848
N0760 G1 X60.4178 Y22.6359 Z-0.0869
N0770 G1 X60.4571 Y22.7648 Z-0.0890
N0780 G1 X60.4957 Y22.8940 Z-0.0911
N0790 G1 X60.5336 Y23.0234 Z-0.0932
N0800 G1 X60.5709 Y23.1532 Z-0.0953
N0810 G1 X60.6074 Y23.2832 Z-0.0974
N0820 G1 X60.6433 Y23.4136 Z-0.0995
N0830 G1 X60.6785 Y23.5442 Z-0.1016
N0840 G1 X60.7130 Y23.6751 Z-0.1038
N0850 G1 X60.7468 Y23.8062 Z-0.1059
N0860 G1 X60.7799 Y23.9377 Z-0.1080
N0870 G1 X60.8124 Y24.0694 Z-0.1101
N0880 G1 X60.8441 Y24.2014 Z-0.1122
N0890 G1 X60.8751 Y24.3337 Z-0.1144
N0900 G1 X60.9055 Y24.4662 Z-0.1165
N0910 G1 X60.9351 Y24.5990 Z-0.1186
N0920 G1 X60.9640 Y24.7321 Z-0.1207
N0930 G1 X60.9922 Y24.8654 Z-0.1229
N0940 G1 X61.0197 Y24.9990 Z-0.1250
N0950 G1 X60.9922 Y24.8654 F300
N0960 G1 X60.9640 Y24.7321
N0970 G1 X60.9351 Y24.5990
N0980 G1 X60.9055 Y24.4662
N0990 G1 X60.8751 Y24.3337
N1000 G1 X60.8441 Y24.2014
N1010 G1 X60.8124 Y24.0694
N1020 G1 X60.7799 Y23.9377
N1030 G1 X60.7468 Y23.8062
N1040 G1 X60.7130 Y23.6751
N1050 G1 X60.6785 Y23.5442
N1060 G1 X60.6433 Y23.4136
N1070 G1 X60.6074 Y23.2832
N1080 G1 X60.5709 Y23.1532
N1090 G1 X60.5336 Y23.0234
N1100 G1 X60.4957 Y22.8940
N1110 G1 X60.4571 Y22.7648
N1120 G1 X60.4178 Y22.6359
N1130 G1 X60.3778 Y22.5073
N1140 G1 X60.3372 Y22.3791
N1150 G1 X60.2959 Y22.2511
N1160 G1 X60.2539 Y22.1234
N1170 G1 X60.2113 Y21.9960
N1180 G1 X60.1680 Y21.8689
N1190 G1 X60.1240 Y21.7421
N1200 G1 X60.0794 Y21.6157
N1210 G1 X60.0341 Y21.4895
N1220 G1 X59.9882 Y21.3637
N1230 G1 X59.9416 Y21.2382
N1240 G1 X59.8943 Y21.1130
N1250 G1 X59.8465 Y20.9881
N1260 G1 X59.7979 Y20.8636
N1270 G1 X59.7487 Y20.7393
N1280 G1 X59.6989 Y20.6154
N1290 G1 X59.6484 Y20.4918
N1300 G1 X59.5973 Y20.3686
N1310 G1 X59.5456 Y20.2457
N1320 G1 X59.4932 Y20.1231
N1330 G1 X59.4402 Y20.0009
N1340 G1 X59.3865 Y19.8790
N1350 G1 X59.3323 Y19.7574
N1360 G1 X59.2774 Y19.6362
N1370 G1 X59.2218 Y19.5153
N1380 G1 X59.1657 Y19.3948
N1390 G1 X59.1089 Y19.2746
N1400 G1 X59.0515 Y19.1548
N1410 G1 X58.9935 Y19.0353
N1420 G1 X58.9349 Y18.9162


when the geometry is simple..

a g code program to cut this part should be 13 lines! not 4000 lines.

[MSimeone]

thanks for photos. can you take covers off of servo motor area? is there any gear reduction from the axis motors to the rack pinion?

Adding some photos with the covers off momentarily - I'll add them to the previous link. There is gear reduction between the servo and the pinion gear, and the two are connected via an XL pitch timing belt.
I put in a request with Teknic to schedule me a time for them to observe / tune as well.
As far as the code - I am definitely not an expert on code programming. I did write that with ramped paths and tabs, don't know how much that would add to the code. When I looked at the arcs specifically, they were with G2 / G3 commands...
Also, I've been using it for years with no problems like this, janky code or not.

I appreciate your input Keith, thanks for taking your time on this.

[ShawnM]

What PP are you using in Vectric? The file of yours that Keith opened and shared is using all G1 moves for circles and this is not correct. Can you share the actual Vcarve file so I can open it in my software and use my PP? Change the name just like you did for your motor files. You should be using the stock Centroid_Arcs_inch PP in the Vectric software and then you can later modify it to work better with your work flow.