M0 and M1 G-codes

Software Carbide Motion
1

I was looking up another code and I saw M0 and M1 in the supported G-Code list.

What is an example of when and how to use them with Carbide Motion?

I have long programs that require a pause, turn off spindle, and clean up chips or the bit or adjust the dust boot between toolpaths. I have a few blocks of code I insert in the gcode file to do this. but they require pressing the Pause button at the right time and place. Could these commands make this easier? thank you

2

M0 (Stop) and M1 (Opstop) I believe behave the same on these machines. They will pause the program, and enable the “Run” or “Start” button to resume.

You’ll probably want to add a retract & spindle stop before the pause, and a spindle on & return to the previous Z after the pause.

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3

Thank you. That would be the same as pressing the pendant or software Pause buttons I think. It would help. I already have a code block that retracts, turns off the spindle, moves to a proper place, then Dwells so I can Pause, before the next segment starts. I will try adding these in place of the Dwell in separate programs and test.

4

The difference with the button is it initiates a feed-hold immediately.
M0, M1 should execute in the order programmed.
Although I have experienced it letting a block of code slip through. i.e. In one example I had to put the M0 before a spindle on statement to pause to let the spindle ramp up to speed.
SO, test it well before running a real job.!!!

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5

I did a quick test yesterday. I put an M1 in a safe part of a program between a few rapid moves 6 to 10 inches apart. The spindle was off. It didn’t pause until it executed the line AFTER the M1. That’s weird. No other commands do that.

Is that what you meant by a block slipping through?

Should it be thought of as M1 = Pause after the next line?

Or does it sometimes process M1 in the correct order?

I’ll have to try more direct tests when I have time. thanks.

1 Like
6

Yes, that’s exactly what I was referring to. And “pause after next block” is a good way to think of it.
The other option, I think would be to include a motion command that doesn’t do anything…
Or add the M1 to the end of the previous block.??

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7

Thanks. I was thinking split it up. If the pause location is X1 Y 1, make it

G0 X1.001 Y1.001
M1
G0 X1 Y1