Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: ironman123 on September 25, 2024, 03:28:31 PM

Title: Mach3 and LazyCAM
Post by: ironman123 on September 25, 2024, 03:28:31 PM

I draw my projects to scale in my CAD program, save it as DXF, export it into Lazy CAM and when it posts G-Code to Mach3, it comes out real small in Mach3.  Any suggestions here?  Thanks

Title: Re: Mach3 and LazyCAM
Post by: JohnHaine on September 26, 2024, 01:34:13 AM

CAD/CAM set to inches but Mach3 to mm?

Title: Re: Mach3 and LazyCAM
Post by: ironman123 on September 26, 2024, 11:05:19 AM

Hi John.  When I used Mach3 begore with my mini mill, it w03ked in inches.  That is ok, I can draw in metric.  In motor tuning, I am using inches.

Title: Re: Mach3 and LazyCAM
Post by: JohnHaine on September 26, 2024, 01:17:11 PM

I just wondered if there was a units incompatibility leading to a 25.4:1 reduction in size.

Title: Re: Mach3 and LazyCAM
Post by: ironman123 on September 26, 2024, 08:25:37 PM

Worth researching.

Title: Re: Mach3 and LazyCAM
Post by: JohnHaine on September 27, 2024, 05:36:56 AM

Post your g-code?  Have you checked the machine moves the commanded distance when you jog it or use the MDI?  AFAIK (just checked again) there's nothing in motor tuning to select inches or mm.  There is a "Steps per" box which is steps (including microsteps) per native unit - which are set in "config\native units".

Title: Re: Mach3 and LazyCAM
Post by: ironman123 on September 27, 2024, 10:13:23 PM

John, I drew in Inches and just before saving the drawing as a DXFI converted to mm.  When I entered it in Lazy CAM, I changed scale from mm to inches and it worked ok that way.  That may have been the way I got around it before.