Machsupport Forum

G-Code, CAD, and CAM => G-Code, CAD, and CAM discussions => Topic started by: Merlin1965 on May 31, 2020, 01:12:10 AM

Title: Loop-d-loop G41
Post by: Merlin1965 on May 31, 2020, 01:12:10 AM

Hi Guys

I seem to get this little extra loop cut that is not required
Pic attached of Screen shot

Also attached my G code file

Any Help appreciated

John Perkins 

Title: Re: Using G41 ..all good but for one spot
Post by: Merlin1965 on May 31, 2020, 01:13:35 AM

some how I did not attach the screen shot

JP

Title: Loop-d-loop G41
Post by: Merlin1965 on May 31, 2020, 05:30:10 AM

I have the same issue and are yet to find the answer

I posted a very similar question before finding this thread

suppose i should use search first .....ooops

John P

Title: Re: Loop-d-loop G41
Post by: Tweakie.CNC on May 31, 2020, 06:26:26 AM

Hi guys,

This is really weird and something I have never come across before.

Which version of Mach3 are you using and which motion controller ?

Tweakie.

Title: Re: Loop-d-loop G41
Post by: Merlin1965 on June 01, 2020, 06:55:03 AM

Hi Tweakie

Thanks for closing other thread

I Have Current Version of Mach 3 and are using a UCCNC-   AXBB-E controller

John P

Title: Re: Loop-d-loop G41
Post by: Tweakie.CNC on June 01, 2020, 07:59:04 AM

Hi John,

In Mach3;  Help / About will show the Mach3 version number.  Which version are you using ?

Sorry but I was thinking of other things when I mentioned Motion Controller I should have said what CAD/CAM software are you using to generate the Gcode ?

Tweakie.

Title: Re: Loop-d-loop G41
Post by: Merlin1965 on June 01, 2020, 08:16:52 AM

Mach 3
I have  Version R3.043.062

I don't use cad/cam ...I write my own code ...then i can Understand the errors ..I often will run program with steppers off to see any errors or do a test run in MDF
I have added pic of machine

John P

Title: Re: Loop-d-loop G41
Post by: Tweakie.CNC on June 01, 2020, 10:47:42 AM

Hi John,

Very nice looking machine.
You are using the latest / best version of Mach3.

There is something not quite right dimensionally with your Gcode file but I am not clever enough to spot where the problem lies. I suspect that Mach3 thinks there is not enough room to apply the cutter radius compensation (lead-in) so it takes an alternative path.
Incidentally UCCNC also reports cutter radius compensation warnings when your Gcode file is loaded which may confirm a Gcode dimensional error is present.

Tweakie.

Title: Re: Loop-d-loop G41
Post by: BR549 on June 07, 2020, 04:10:00 PM

Tweakie is correct. IF mach3 sees that the leadin is too short for teh tool it will create a path to make it work. Normally the path will be incorrect when it does so. One of Mach3 quirks.

I would not trust UCCNC error codes either as teh G41 in that controller has quirks of its own.

Just a thought , (;-) TP