Crossfire legacy mach3

CrossFire ® Troubleshooting
1

New to this world.
Got a used original legacy (no thc)
Downloaded fusion360 and mach3
Put the download file into mach3 for the crossfire off website

So , if I make a simple circle in fusion 360 run the simulation, it will show it cut. Put through post process ( only 11 lines of g code)

When I put it into mach3 it does not show the part in the view screen and will say “radius to end of arc differs from radius to start”

But if I do all the same steps in fusion but make it a square with a square hole in it , I can put in mach3 shows on the viewer and can cut it

If I do a square with round corners or a square with a hole in it I get same issues

I’m assuming I missing something. But have also tried some of the free dxf files on the site, and they won’t work when converted with lazy cam, or sheetcam

Kinda lost at this point. Thinking it’s a setting in mach3?
Mach3 is a demo but it’s not 500 lines for a circle

2

did you add the mach3 post processor into fusion from the download section?

3

hey…good to see you from Facebook…

I think you will get some answers here… @TinWhisperer is a great Fusion guy and @TomWS is I believe
still running Mach3…

4

I did add the crossfire profile into mach3

And the new fusion I downloaded had the post processor with it already, same number as the one you can download

5

i believe there’s a crossfire/mach3 post processor for fusion as well that you need to use. i haven’t used fusion since i has the original table but i saw in the downloads section under legacy mach3 the crossfire PP for fusion.

http://cam.autodesk.com/posts/download.php?name=mach3%20plasma

if you’re using sheetcam, you can use the “Mach3 plasma with no Z axis” post processor from the list.

2 Likes
6

I agree with @nicaDd

I would check out and make sure that you have the right post processor installed in Fusion 360.

go ahead and just try to download the post processor off langmuir site for mach 3 and use it

7

Yeah tried to download the post processor for fusion and it’s the same one thats installed , just downloaded fusion this weekend.

Also I have tired other programs (qcad , autocad)to make files and then sheetcam (with mach3 no z selected)and also lazycam to do the tap files.

And all say same thing in mach3 when they have a round edge or circle in it. "Radius arc not at same point ect"and won’t show the preview of part on mach3

So I was thinking it was a mach3 issue possibly cause of multiple programs doing it.

I was going to try and reinstall all programs tonight maybe

8

Can you post the generated program?

9

@Lilpickle
Howdy Brian… I remember this error from a ways back…

A quick search shows me this------>

Open Mach3 and go to Config>General Config and change the IJ mode to Absolute. Reload the file and it should load without that error message.

EDIT: So this fix above proved to be wrong… Should have stated to change IJ mode to “INC” not “absolute”… User now has a working system!!

10

mach3config
mach3config1366×768 281 KB

this is my mach3 general config

11

mach3plasmalibray
mach3plasmalibray1366×768 169 KB

here is what i had selected in fusion for mach3

12

fusionsitesamenumber
fusionsitesamenumber1366×768 104 KB

this is same number as the fusion download page

13

circlecode1
circlecode11366×768 301 KB

top half of the code for a just a circle from fusion
and you can see no preview in box

14

circlecode2
circlecode21366×768 300 KB

2nd part of code with radius warning in bottom box

15

but i can make a box with a square and a triangle in it and it will preview and the cnc would follow what fusion shows me also

boxwithshapes
boxwithshapes1366×768 296 KB

16

Rats!! I thought that would have done it… Try adjusting your initialization string to look like the one in the following picture…

image
image1169×2079 558 KB

This seems to have worked in an earlier post by @john543 here:

I’m not running Fusion or Mach3 any more but, I do think I had to do this also… It sounds very familiar…

Also, when starting Mach3 do you get the option to choose the Crossfire Profile like below?
image

17

yeah i have the crossfire profile loaded , asked me when you open, and i deleted the rest to make sure i didnt pick wrong one later. shows in the bar on the screen also.

tried adding the G91.1 no change

18

wonder if i should wipe mach3 off computer and redownload

19

Might not be a bad idea…
Plus, I’ve just been going off of memory here… I know there are still some Mach3 people around… I wouldn’t give up hope just yet… I’m sure they will chime in here eventually…

20

post the gcode file here and someone can try running it on their computer. Cletus still runs mach3.