Choppy Contour - PLEASE HELP

[dwmartin]

using X3 - i roughed out an 11" circle with a 1/2" endmill leaving .01 and came back with a 1/4" endmill to do some clean up and pockets - the OD face has flats and is not a smooth contour.

 

did i loose a setting when i switched over from X2?

 

i am using a HAAS

 

thanks

[strabe]

I've seen this happen if the circle is actually a spline. Did the code look right?

 

BTW, welcome to the forum.

[Mark V.]

Are you using arcs? Splines will do that sometimes

[dwmartin]

i believe arcs - the contour toolpath was created off of a face from a solidworks model

 

is there a setting to blen these better?

[Hardmill]

Analyse the drive geometry and edit *simplify

if its not an arc

 

 

PEACE

[dwmartin]

hate to sound like an idiot - but how would i "simplify" the geometry.

[Hardmill]

Select the geo, then from the pull down menu

*edit*simplify.

 

If its a spline it will change it to an arc.

 

 

PEACE

[dwmartin]

the geometry contains a solid

[Josh T™]

dwmartin,

 

I've ran into this situation several times with importing models. If the toolpath is a true contor, try Create - Curve - Slice then pick the surface at which you want the slice to be made through. You must provide a Z plane deeper than the top of the surface to create the curve properly, I'd suggest using a different color than the base geometry for visual purposes. Once the curve has been generated use it for the countour chain geometry and see if that helps. It usually works for me.

 

HTH

Josh

[can machine]

I'am having a similar problem. I just did a fresh install of X3. I created an elipse using master cam and used a font to create some numbers inside of it. When I machine it, all the numbers and elipses are very choppy. I tried using simplify and that did not seem to work. Is there a setting I need to change somewhere?

[Glenn Bouman]

Run the "MCAMX Control Panel Applet" from the MastercamX3 program group and check to see if the "new arc filter" is turned on.

 

I have seen this problem when doing the 2d HST toolpaths and the "new arc filter" was turned off.

 

If that does not help, let us have a look at your MCX file.

[Guest]

These settings may help as well

 

[can machine]

I tried both of your suggestions and neither seemed to work.

[Ployd]

I've also been getting some poor results using contour to cut out circles. I've tried the filter and it didn't help either. I will try the new arc filter, but why is it so hard to cut a circle when the geometry looks good?

[can machine]

Here is the g-code. Does it look right? I don't know much about g-code.

 

N100 G00 G17 G20 G40 G80 G90

N110 G91 G28 Z0.

N120 (WCS NAME - TOP)

N130 (TOOLPATH GROUP - TOOLPATH GROUP-1)

N140 (COMPENSATION TYPE - COMPUTER)

N150 T4 M06 ( 1/2 FLAT ENDMILL)

N160 (MAX - Z2.)

N170 (MIN - Z-.65)

N180 M08

N190 G00 G17 G90 G54 X10.1776 Y.6448 S3100 M03

N200 G43 H4 Z2.

N210 Z.1

N220 G01 Z-.65 F6.42

N230 X9.9715 Y.1892 F25.

N240 G03 X10.221 Y-.4724 I.4556 J-.2061

N250 G02 X11.5802 Y-1.2669 I-2.8967 J-6.5156

N260 X12.6029 Y-2.2304 I-3.6008 J-4.8467

N270 X13.3459 Y-3.4061 I-3.9417 J-3.3135

N280 X13.7405 Y-4.9635 I-4.0873 J-1.8644

N290 X13.4589 Y-6.8215 I-4.3914 J-.2848

N300 X12.7981 Y-8.0217 I-4.6523 J1.7794

N310 X11.8486 Y-9.0209 I-4.6803 J3.4967

N320 X10.556 Y-9.8676 I-4.3825 J5.2809

N330 X10.0261 Y-10.1117 I-3.4454 J6.7828

N340 G01 X7.0906 Y-11.8065

N350 G02 X6.9281 Y-11.85 I-.1625 J.2815

N360 G01 X6.5719

N370 G02 X6.4094 Y-11.8065 I0. J.325

N380 G01 X3.4739 Y-10.1116

N390 G02 X2.0488 Y-9.3272 I2.7623 J6.7053

N400 X.9931 Y-8.3816 I3.5469 J5.0217

N410 X.2322 Y-7.2584 I3.9306 J3.482

N420 X-.2157 Y-5.7946 I4.0718 J2.0464

N430 X.0105 Y-3.7616 I4.3457 J.5455

N440 X.6462 Y-2.5548 I4.6408 J-1.6736

N450 X1.5733 Y-1.5453 I4.6856 J-3.3728

N460 X2.8458 Y-.6833 I4.4171 J-5.15

N470 X4.5482 Y-.0286 I3.6798 J-7.0279

N480 X9.0651 Y-.0589 I2.2012 J-8.5583

N490 X10.221 Y-.4724 I-2.1214 J-7.7514

N500 G03 X10.8814 Y-.2198 I.2039 J.4565

N510 G01 X11.0853 Y.2368

N520 G00 Z2.

N530 M09

N540 M05

N550 G91 G28 Z0.

N560 G28 Y0.

N570 G90

N580 M30

%

[Guest]

Have you actually tried to cut with that?

 

Looking quickly through that code, if it is cutting a choopy finish, I am thinking it's more a machine issue than a code issue

[gcode]

I ran your code through CImco Edit backplot

Its not even close to a circle.

It looks like an oval cam lob with a sharp point

[John@WMM]

What GCODE said was true for me also running through Cimco

[Guest]

yup, I tried it after gcode as well

 

 

May well be a post issue

[keith mc.]

i get the same as gcode not a circle in cimco editor backplot.

[can machine]

I'm not cutting a circle. CONCEPT TOOLING- that is what my shape should looks like. The issue is it does not cut nice curves. They are all choppy. The sides look like a disco ball.

[Guest]

Are they looking choppy ON the machine or in Verify?

[slipfit]

are useing a side lock holder?

[slipfit]

sorry thinking faster than i can type. more often then not when i have these problems its do to poor setup or splines.

[can machine]

They look choppy on the part. It can't be my tool holder because it does it with different tools.