Curve 5 Axis Help

[Greg_J]

Hello,

I have a program that does not follow the entire chain it starts and stops just short of completing the entire chains.

I have two chains and the start of one is short and the end of the other is short.

 

The program should start at A+90 and finish at A-90 then moves in the X and then comes back to A+90.

 

The actual cut should starts at A89.523 and cuts to A-90, it starts back at A-90 and finishes at A89.523.

 

I have many parts like this I've done with no issues but this one is giving me problems.

I've checked my geometry to see if there was and issue with a surface or chain and I don't see any issues.

I also checked the lead in and out I just can't see the problem.

 

TIA,

Greg

HELP.mcx-9

[Greg_J]

Posted in the wrong forum can you please move the topic.

 

Thanks

[Jim at Gentex]

That is weird.

I use the 'closed loop overlap' at times but I don't see that solving this particular problem.

[gcode]

I moved this from  off topic to the main forum

[Greg_J]

If I set the chain to single it does the pass correctly but I only get to cut in one direction, so I guess I'll make two programs one for each direction?

[sir Camalot]

I was able to get the output to behave correctly by going to.... "Linking/ Keep tool down within" and change "% of tool diameter" value to 3000 instead of 300. Not sure exactly why but it worked.

[crazy^millman]

Greg did you by chance analyze the surface you are using? You do know it is not a perfectly round shape? I am not following what you are trying to accomplish here. You have 2 chains that represent 180 degrees of sweep, but you don't want want to cut that correct? Why wouldn't you make chains that are the sweep you want to make? You could use to point which is the center of the arc and not even need the surface, but if you want something different than the sweep you have drawn you would just need to draw the sweep and call it a day.

 

Here is what you said you wanted with no surfaces just wireframe and it gives the exact code you said you wanted. Doing it any other way is a cheat and not sure why you are trying to cheat to get exact results. Sorry no X9 on this new Laptop.

 

https://www.dropbox.com/s/jlhgn5heab2vl3y/5th%20Axis%20Help.mcam?dl=0

 

Here is the code from a Siemens post.

;%_N_S3-6770314-0750-2_MPF
;PROGRAM NAME - S3-6770314-0750-2
;MASTERCAM    - X10
;MCX FILE     - C:\USERS\RON\DOCUMENTS\MY MCAM2017\MCX\5TH AXIS HELP.MCAM
;POST         - JOBS_LINX_840D
;PROGRAMMER   - RON BRANCH 5TH AXIS CONSULTING GROUP INC.
;MACHINE      - JOBS LINX J1251
;GRP NAME     - MACHINE GROUP-1
;PROGRAM      - S3-6770314-0750-2.MPF
;DATE         - JAN-17-2017
;TIME         - 3:31 PM
;T10    - 1/2 ENDMILL FLUTE CUT - D1     - DIA .5"

N10 G0 G90 G17 G700 G40 G601 FNORM
N11 HSM(1,0.002000)
N12 TRAFOOF
N13 SUPA G0 Z=0.000 D0
N14 SUPA G0 A=0.000 C=0.000
;T10    - 1/2 ENDMILL FLUTE CUT - D1     - DIA .5"
N15 T10
N16 L6
N17 SUPA G0 Z=0.000 D0
N18 SUPA G0 A=0.000 C=0.000
N19 TRAORI
N20 G0 G54 G90 A-89.523 C0. D1
N21 X-2.3375 Y3.9999 Z.0333 S1800 M3
N22 M07
N23 Y2.4999 Z.0208
N24 G94 G1 Y1.9999 Z.0167 F18.
N25 X-2.4375
N26 Y1.9966 Z.1166 A-86.658
N27 Y1.9882 Z.2162 A-83.793
N28 Y1.9749 Z.3154 A-80.926
N29 Y1.9566 Z.4137 A-78.061
N30 Y1.9335 Z.511 A-75.197
N31 Y1.9056 Z.607 A-72.333
N32 Y1.8729 Z.7014 A-69.469
N33 Y1.8356 Z.7942 A-66.603
N34 Y1.7935 Z.885 A-63.737
N35 Y1.747 Z.9735 A-60.872
N36 Y1.6961 Z1.0596 A-58.006
N37 Y1.641 Z1.143 A-55.142
N38 Y1.5819 Z1.2237 A-52.276
N39 Y1.5187 Z1.3013 A-49.409
N40 Y1.4518 Z1.3756 A-46.545
N41 Y1.3812 Z1.4464 A-43.68
N42 Y1.3072 Z1.5136 A-40.814
N43 Y1.2299 Z1.577 A-37.95
N44 Y1.1495 Z1.6365 A-35.085
N45 Y1.0663 Z1.6919 A-32.22
N46 Y.9804 Z1.7431 A-29.355
N47 Y.8921 Z1.79 A-26.491
N48 Y.8015 Z1.8324 A-23.625
N49 Y.7089 Z1.8701 A-20.76
N50 Y.6145 Z1.9032 A-17.894
N51 Y.5186 Z1.9315 A-15.028
N52 Y.4214 Z1.955 A-12.163
N53 Y.3231 Z1.9736 A-9.297
N54 Y.2241 Z1.9873 A-6.433
N55 Y.1245 Z1.9961 A-3.568
N56 Y.0246 Z1.9998 A-.704
N57 Y-.0754 Z1.9986 A2.16
N58 Y-.1752 Z1.9923 A5.025
N59 Y-.2745 Z1.981 A7.89
N60 Y-.3732 Z1.9647 A10.756
N61 Y-.471 Z1.9436 A13.621
N62 Y-.5676 Z1.9177 A16.487
N63 Y-.6628 Z1.887 A19.353
N64 Y-.7563 Z1.8515 A22.218
N65 Y-.8479 Z1.8114 A25.084
N66 Y-.9374 Z1.7667 A27.95
N67 Y-1.0245 Z1.7176 A30.815
N68 Y-1.1091 Z1.6642 A33.681
N69 Y-1.1909 Z1.6067 A36.547
N70 Y-1.2697 Z1.5452 A39.411
N71 Y-1.3454 Z1.4798 A42.277
N72 Y-1.4177 Z1.4107 A45.142
N73 Y-1.4864 Z1.338 A48.008
N74 Y-1.5514 Z1.2621 A50.872
N75 Y-1.6125 Z1.1829 A53.737
N76 Y-1.6696 Z1.1008 A56.602
N77 Y-1.7226 Z1.016 A59.469
N78 Y-1.7713 Z.9286 A62.334
N79 Y-1.8155 Z.839 A65.198
N80 Y-1.8552 Z.7471 A68.064
N81 Y-1.8902 Z.6535 A70.928
N82 Y-1.9204 Z.5582 A73.793
N83 Y-1.9459 Z.4615 A76.657
N84 Y-1.9665 Z.3636 A79.524
N85 Y-1.9823 Z.2649 A82.389
N86 Y-1.9931 Z.1655 A85.254
N87 Y-1.9989 Z.0657 A88.118
N88 Y-1.9999 Z.0167 A89.523
N89 X-2.0625
N90 Y-1.9966 Z.1166 A86.658
N91 Y-1.9882 Z.2162 A83.793
N92 Y-1.9749 Z.3154 A80.926
N93 Y-1.9566 Z.4137 A78.061
N94 Y-1.9335 Z.511 A75.197
N95 Y-1.9056 Z.607 A72.333
N96 Y-1.8729 Z.7014 A69.469
N97 Y-1.8356 Z.7942 A66.603
N98 Y-1.7935 Z.885 A63.737
N99 Y-1.747 Z.9735 A60.872
N100 Y-1.6961 Z1.0596 A58.006
N101 Y-1.641 Z1.143 A55.142
N102 Y-1.5819 Z1.2237 A52.276
N103 Y-1.5187 Z1.3013 A49.409
N104 Y-1.4518 Z1.3756 A46.545
N105 Y-1.3812 Z1.4464 A43.68
N106 Y-1.3072 Z1.5136 A40.814
N107 Y-1.2299 Z1.577 A37.95
N108 Y-1.1495 Z1.6365 A35.085
N109 Y-1.0663 Z1.6919 A32.22
N110 Y-.9804 Z1.7431 A29.355
N111 Y-.8921 Z1.79 A26.491
N112 Y-.8015 Z1.8324 A23.625
N113 Y-.7089 Z1.8701 A20.76
N114 Y-.6145 Z1.9032 A17.894
N115 Y-.5186 Z1.9315 A15.028
N116 Y-.4214 Z1.955 A12.163
N117 Y-.3231 Z1.9736 A9.297
N118 Y-.2241 Z1.9873 A6.433
N119 Y-.1245 Z1.9961 A3.568
N120 Y-.0246 Z1.9998 A.704
N121 Y.0754 Z1.9986 A-2.16
N122 Y.1752 Z1.9923 A-5.025
N123 Y.2745 Z1.981 A-7.89
N124 Y.3732 Z1.9647 A-10.756
N125 Y.471 Z1.9436 A-13.621
N126 Y.5676 Z1.9177 A-16.487
N127 Y.6628 Z1.887 A-19.353
N128 Y.7563 Z1.8515 A-22.218
N129 Y.8479 Z1.8114 A-25.084
N130 Y.9374 Z1.7667 A-27.95
N131 Y1.0245 Z1.7176 A-30.815
N132 Y1.1091 Z1.6642 A-33.681
N133 Y1.1909 Z1.6067 A-36.547
N134 Y1.2697 Z1.5452 A-39.411
N135 Y1.3454 Z1.4798 A-42.277
N136 Y1.4177 Z1.4107 A-45.142
N137 Y1.4864 Z1.338 A-48.008
N138 Y1.5514 Z1.2621 A-50.872
N139 Y1.6125 Z1.1829 A-53.737
N140 Y1.6696 Z1.1008 A-56.602
N141 Y1.7226 Z1.016 A-59.469
N142 Y1.7713 Z.9286 A-62.334
N143 Y1.8155 Z.839 A-65.198
N144 Y1.8552 Z.7471 A-68.064
N145 Y1.8902 Z.6535 A-70.928
N146 Y1.9204 Z.5582 A-73.793
N147 Y1.9459 Z.4615 A-76.657
N148 Y1.9665 Z.3636 A-79.524
N149 Y1.9823 Z.2649 A-82.389
N150 Y1.9931 Z.1655 A-85.254
N151 Y1.9989 Z.0657 A-88.118
N152 Y1.9999 Z.0167 A-89.523
N153 X-2.1625
N154 G0 Y2.4999 Z.0208
N155 Y3.9999 Z.0333
N156 TRAFOOF
N157 M09
N158 M5
N159 SUPA G0 Z=0.000 D0
N160 SUPA G0 A=0.000 C=0.000
N161 M30

[David Colin]

If you extend your surface a little (+0.001 is enough) at start/end it will do the trick.

HELP-mod.mcx-9

[Greg_J]

Thank you everyone for your input/help, I appreciate it very much.

 

Ron,

I didn't analyze that surface it does vary around .003, I thought that creating a surface using swept would create a perfect surface based on my geometry using the across contour being the half circle and the along contour being the length. I don't want my tool to move at all in the Z.

 

Like you suggested I changed the tool axis control from surface to To point and it fixed the problem.

 

I do have MC 2017 but my supervisor that helps me program occasionally doesn't want to make the jump so i'm stuck in X9 till he does.

 

 

I attached a new file that is a dumbed down model of what I'm working on.

 

Can you please look at the second program too, how would you finish the bottom, I need the make the bottom smooth and relativity flat.

 

See the new attached file.

 

HELP-2.mcx-9

[crazy^millman]

You picked a good way to finish the floor. You will need to make sure you have perfectly flat bottom endmill. Don't use front on the tool axis control use center of the tool tip control. Using front will create cusps on the surface of the floor. For roughing using front is a good process, but for finishing you need to let the natural shape of the tool do the work here and the natural shape of the front of the tool will not create a flat floor, where as perfectly flat endmill will. 

 

I would change the linking to add approach into and off the cut. You didn't set them on the First Entry and Exit Entry. I would set to Use Lead-in and Use Lead-out. Remember to use the flip function to change the angle coming in or out of a cut if they don't start the way you would like. These are extremely powerful ways to get in out of a Multi-Axis cut and they do take some time to get use to and even then hard to remember what all they do. Sometimes you just need to be willing to adjust till you get exactly what you are looking for in the toolpath to produce the results you are looking for. I would have the lead in set on the default. You also picked the floor as a check surface and I would use the walls as a check surface not the floor. Other than that you should be good to go. Let us know how it turns out.

[WestRiver]

For my new years resolution I thought I would help others on this forum instead of just being helped so here goes.

I see you are just using a 4 axis machine definition so I assume you are going to cut the other stuff first. If it were me I would use xform roll and unroll the 2 contour lines and then use simple contour with axis substitution to cut them to size then using the same 2 lines I would run a

flat bottom counterbore like the kind Harvey tools sells and take the hump on the surface left by the end mill out yep that's how I would do it

but then again I am old school and don't have the multi axis stuff.

[Greg_J]

Thanks again for your help.

 

I have been making these parts for awhile now and slowly improving my cycle times, the Curve 5 Axis was giving giving me problems this time.

The good thing about asking for help is all the new things to learn.

 

I take a few pics of the results and post them.