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### Author Topic: G-Code scaling program, mm to Inches and back  (Read 86484 times)

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#### zoheirlabibes

• 11
##### Re: G-Code scaling program, mm to Inches and back
« Reply #40 on: April 10, 2013, 10:01:09 AM »
thanks EL34

i write a simple G-code to cut a square but the toolpath follow a curve when reach the square corner not a 90°

#### Graham Waterworth

• 1,865
• Yorkshire Dales, England
##### Re: G-Code scaling program, mm to Inches and back
« Reply #41 on: April 10, 2013, 02:03:51 PM »
you need to slow the feed or change the setting to exact stop mode this will produce square corners.

Without engineers the world stops

#### zoheirlabibes

• 11
##### Re: G-Code scaling program, mm to Inches and back
« Reply #42 on: April 11, 2013, 10:03:27 AM »
thanks graham

i'll try it soon.

#### aussieexpat

• 6
##### Re: G-Code scaling program, mm to Inches and back
« Reply #43 on: June 16, 2014, 11:00:25 AM »
Hi All,
This is my first post!! I really need some assistance, would be very much appreciated. I am engraving using Mach3 licensed version. Its a simple 2 d engraving on brass. I am using the nice Deskengrave program. Now this is where i need the assistance. The machine is engraving normally but what i need it to do is to engrave in a mirror fashion or reversed so then when i make a molding, the image will be reversed in the normal way. Please all of you pro's out there HELP HELP HELP!!!!
Best Regards
Greg

#### Tweakie.CNC

• 7,885
• Super Kitty
##### Re: G-Code scaling program, mm to Inches and back
« Reply #44 on: June 16, 2014, 11:49:05 AM »
Hi Greg,

If you change your X axis Scale DRO from +1.0000 to -1.0000 that will produce the reverse image.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.

#### aussieexpat

• 6
##### Re: G-Code scaling program, mm to Inches and back
« Reply #45 on: June 17, 2014, 09:35:24 AM »
Hi Tweakie!
Many thanks for your reply. Just one question cause i'm a dummy, how does one change this setting in Mach3? Do you go to Config to general config?
Cheers
Greg

#### Tweakie.CNC

• 7,885
• Super Kitty
##### Re: G-Code scaling program, mm to Inches and back
« Reply #46 on: June 17, 2014, 11:39:09 AM »
Hi Greg,

Just click the scale DRO box, enter the new value (-0.0000) then press (keyboard) return. The associated LED will flash to indicate the change.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.

#### aussieexpat

• 6
##### Re: G-Code scaling program, mm to Inches and back
« Reply #47 on: June 17, 2014, 11:55:05 AM »
Hi Tweakie,
Many thanks for your reply! The dummy continues, I;m sorry but where is the scale DRO box in Mach3? I tried looking so much my vision is blurred. Is it in the "OFFESETS" window or the "CONFIG" dropdown window?
Cheers
Greg

#### Tweakie.CNC

• 7,885
• Super Kitty
##### Re: G-Code scaling program, mm to Inches and back
« Reply #48 on: June 17, 2014, 12:14:04 PM »
No worries Greg - I have been using Mach for the last 10 Years and I still don't know the half of it.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.

#### Tweakie.CNC

• 7,885
• Super Kitty
##### Re: G-Code scaling program, mm to Inches and back
« Reply #49 on: June 17, 2014, 12:22:26 PM »
Hi Greg,

Just one point of note - if your part origin (X0,Y0) is centre of the work then it's OK but if your part origin is bottom left then by changing the scale DRO to a negative value the origin will become bottom right (the GCode for the work has been flipped horizontally so has the starting point X0,Y0).
Not sure if this makes sense but you will see what I mean when you do it.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.