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Author Topic: Radius to end of arc differs from start  (Read 403 times)

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Radius to end of arc differs from start
« on: November 16, 2020, 03:26:22 PM »
Hi all.
Im   New to cnc. Not been learning for very long. Hit a brick wall. Looked on youtube internet. With no joy how to solve the problem  im drawing a simple arc. In autocad. Saving the file as dxf  then im sending the file to lazy cam i clean it scale it generate the gcode.  I then load code in mach 3 turn mode. and in the screen. It just shows circle. Ive tried it with a diamond shape with a radius   Ive gone to general config and tried changing  ij settings. To absulte and inc.  etc. And same in lazy cam.  And still same shows on screen. What am i doing wrong. Can anyone help.
   

Offline Graham Waterworth

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Re: Radius to end of arc differs from start
« Reply #1 on: November 16, 2020, 06:50:05 PM »
Change the IJ mode in config
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Re: Radius to end of arc differs from start
« Reply #2 on: November 17, 2020, 03:45:11 AM »
I have changed the ij settings in Mach 3 In config and saved changes   I have tried  both settings absolute and inc   And still get same result  a circle in the screen  ??

Offline TPS

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Re: Radius to end of arc differs from start
« Reply #3 on: November 17, 2020, 04:20:26 AM »
can you pls post the dxf and gcode file?
anything is possible, just try to do it.
if you find some mistakes, in my bad bavarian english,they are yours.
Re: Radius to end of arc differs from start
« Reply #4 on: November 17, 2020, 02:11:02 PM »
 the  dxf file  and the g code generated

Offline Graham Waterworth

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Re: Radius to end of arc differs from start
« Reply #5 on: November 17, 2020, 04:54:30 PM »
Are you working in Diameter or Radius mode, Diameter is normal
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Offline Graham Waterworth

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Re: Radius to end of arc differs from start
« Reply #6 on: November 17, 2020, 05:16:13 PM »
Try this and see if you get the same as shown here:-

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Offline RICH

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Re: Radius to end of arc differs from start
« Reply #7 on: November 18, 2020, 07:20:45 AM »
LazyCam's turn module leaves much to be desired and can be problematic to use. That is one reason that LAZYTURN was created to be a replacement for that module. There is a manual for LazyCam which has a Turn tutorial in it ...... been over 10 years since that was written.
RICH
Re: Radius to end of arc differs from start
« Reply #8 on: November 18, 2020, 12:08:28 PM »
Hi thanks for reply‚Äôs 
 I am working in radius ...
 I have read lazy cam manual  but still having issues ,,,,
 I will try that in Mach and see if I get same results  cheers   
Re: Radius to end of arc differs from start
« Reply #9 on: November 18, 2020, 01:06:18 PM »
Try this and see if you get the same as shown here:-

Sent your balltap Program to mach3 this is what it throws up