Line numbers matter when changing g-code?

[Mtw fdu]

Just a quick question regarding numbers for lines.

If any changes are made eg. If I were to put a M00 for a programme stop do I need to change all the numbers to be in order or can it be left out all together?

Want to put a stop after some cuts so that I can pull the parts out before they get covered in dross from the torch.

Cheers for the help.

Mtw fdu.

[adbuch]

In general - line numbers are optional, and used for reference only. I don't use them for my cnc machines to save program memory.
Line numbers are sometimes used for looping or subroutine calls - depending on controller.

David

line numbers optional.jpg

[adbuch]

I also use program stops between some operations for cnc machining so that he machine will pause and I can measure the OD, or in some cases release the collet and pull the material out to the desired length before the cut-off operation.
David

[Mtw fdu]

Thanks for the info David.

I have used the M00 with cnc milling when need to check tooling after certain ops to make they are not worn too much and if they have broken altogether.

I have used them for stopping the cutting when doing square tubing to change sides etc. I have manually changed the numbers manually when doing this...however, if it is a long program it can time consuming. Would there be a short cut for the same process when using plasma?

Thanks again for your help.

Mtw fdu.

[adbuch]

You could probably modify your post processor to add them in automatically. The post processor I use for my cnc machining centers puts in the option stops and program end automatically, and I manually put in any program stops I need.
David

[acourtjester]

I have used M00 when I an using a dimple g-code for center punching drill locations. After they are finished I have the M00 so I can change the nozzle or change the amps setting on the Plasma. Then the finish of the G-code is for normal cutting out of the parts. the line number help for the placement of the M00.
https://drive.google.com/file/d/1jdkwyU ... share_link

[Mtw fdu]

Thanks guys.

I just added in the M00 where I needed them witot changing the numbers and it all worked fine.

Mtw fdu.

[adbuch]

Thanks guys.

I just added in the M00 where I needed them witot changing the numbers and it all worked fine.

Mtw fdu.

That's exactly what I do.
David