Oxy/Fuel table

Hi

I built you a new PP for SheetCAM that addresses all of your answers. Have you tried it?

Andy

A Mach3 post will not make workable Gcode for use with CommandCNC. We still don't know what the Mach 3 post was. It really doesn't matter now because I have provided the OP with a post that at least produces Gcode that fulfills his requests and am awaiting confirmation that it work as it should on production parts.

John

I saved both the above files to a memory stick

Do I copy the files to the "posts" folder in sheetcam?

You must first strip the .txt extension off of the file name for the post by right clicking on the file and using the rename action. Then place the file in the ~/sheetcamtng/posts directory. The .ngc file doesn't need to be placed anywhere, it is just a small example of gcode created by SheetCam using this post. You can open this file with you text editor and see if it does what you want, it is just Gcode.

John

Yes I now have the movement I want for the Rapid, Preheat, then raise for pierce

Still will not run from any line The Run From Line button will only work from the beginning of a contour. The post processor is only setting feed rate on the first line segment of a contour. If I try to restart in the middle of a contour I get error messages

"Cannot make arc with zero feed rate"
"Cannot do g1 with zero feed rate"

Hi,

You can import post processor in sheetcam with => options/machine/post processor/ => import post

In attached linuxcnc postprocessor F1 and S1 are loaded at loading gcode. (init function)
I think this can be your problem if you want to start at a certain line and you get error message's as
you explained.

Or try to add some gcode to your ini file :
For example : RS274NGC_STARTUP_CODE = .... ..... ..... G40 G49 G64 P0.001
how to set up startup ngc startup code

change file extension from .zip to .scpost

Yes, that is the way the post works because feed rates are modal.

CommandCNC will allow you pause the program and use the Gcode preview to select the line you want to run from, usually the end of the last cut. If you stop the program and then use the LinuxCNC run from line feature then you will need to set your feed rate and G64 parameters in MDI first. Or do as I do and just edit the file so that it still has all preamble lines then starts where I want.

CommandCNC does allow you to arbitrarily set the line to run from when paused. A way to make sure you always get the preamble and any other startup code is to put an M1 just before the cutting starts to force a program pause. Then you can advance the the to the line you want to start at in the Gcode preview and then press the run/pause button to start the code running from the selected location. This process is explaned in the CommandCNC manual. I can fix the post so it does this if you want.

John

I have always done the ignite & pierce manually on a restart mid cut.