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Author Topic: Cut a circle?  (Read 3734 times)

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Cut a circle?
« on: October 20, 2009, 08:41:45 PM »
Maybe just me, but I have never been able to get the NF wizards to cut a circle.  I have never really gotten any use out of the NF wizards because I just don't trust them,  if I can't get it to cut a circle. Andy's circle routines work fine.  Please help.  I'm using 2.83

I entered:
Tool Dia .1875
X center 0
y center 0
Circle dia 1.0000
Cut outside
Depth .008
Rapid height .5000
Step depth .008

G code I get:

(Code by Newfangled Wizard, 10/20/2009)
(Version 2.83)
(Program Posted for Aluminum )
G0 G49 G40.1 G17
G80 G50 G90 G98  
G20 (Inch)
(***** Circular Groove/Cutout *****)
M6 T1
M03 S4000
M7 (Mist On)
G00G43 H1 Z0.5
G00 X0.7812 Y-0.1406
G42 P0.09375
G01 X0.6406 F9.9
G02 X0.5 Y0 R0.1406
G01 Z-0.008 F4.95
G03 X-0.5 Y0 R0.5
X0.5 Y0 R0.5
G00 Z0.5
G02 X0.6406 Y0.1406 R0.1406
G40
G00 X0.7812 Y0.1406
M5 M9
M30

Offline TDAY

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Re: Cut a circle?
« Reply #1 on: October 22, 2009, 12:56:48 PM »
What is it doing or not doing? Tried it here at it worked for me.
Troy
"I try to put forth the effort,before asking a dum question"
http://homecncstuff.elementfx.com
Re: Cut a circle?
« Reply #2 on: October 22, 2009, 09:01:38 PM »
Did you try the code as I posted it, or try the wizard.  If the wizard works for some people and not for me I want to find out why.  It makes a circular shape of some sort, just not a circle.

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Re: Cut a circle?
« Reply #3 on: October 23, 2009, 07:26:46 AM »
 I am using version 2.83 of wizards and used the wizard with your inputs,and looks good here.
Seems i had a "ODD" shaped circle one time,and this is what fixed it.
Goto....Config> General Config>, and check to see you have Constant Velocity selected,Distance Mode is Absolute, and IJ mode is Inc.
Also when you run a Cut Circle make sure the CV Mode LED is on.

HTH
Troy

"I try to put forth the effort,before asking a dum question"
http://homecncstuff.elementfx.com
Re: Cut a circle?
« Reply #4 on: October 23, 2009, 07:29:26 PM »
The cut circle routine uses a circular lead in and lead out so you will see several moves besides the circle you want. The ramp in and out are properly handled if you ask for a groove the lead happens above the work- clearly it doesnt help with the cut, but it still makes a lead in.

In addition to the circular lead in there is a linear move to turn on the cutter comp.

As far as I know the circle routine works for all cases, Ive tested it a lot and i use it fairly often.