Numerically setting origin

Software Carbide Motion
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I think I have this but need to make sure before I lose a piece I’ve spent three days on. Look before you leap!

I need to work on some other pieces requiring a different origin but may need to reset the origin to work on the previous piece. Does this protocol work:

• Home the machine and note the X and Y valued (Z not important).
• Perform other work.
To return to the previous work:
• Home the machine.
• In Jog > Set Zero, enter the noted X and Y values w/Enter.

Is it as simple as this or need I do something else?

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Alternately, I believe you can:

  • click on Position to toggle to Machine Coordinates when at the zero
  • write those numbers down

Then to return:

  • initialize the machine
  • clear offsets (which should put you in machine coordinates) EDIT and also click on Position to get to Machine coordinates
  • set the origin using the noted values

That said, when feasible, I make my origins when I need to repeat something co-incide w/ a rapid position point.

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Ooh, I like that rapid position idea.

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Hmmm. . . I do not find a Position button, perhaps because I’m using an old version of CM due to computer constraints?

Yeah, not feasible with my current work to use rapid position points but a good idea in general.

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also using the MDI screen you just can go to a specific coordinate (no need to jog)

just type

G0X50Y50

to go to (50,50)

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I’m aware of this ability but don’t know how it applies to my situation. As far as I know, CM is displaying coordinates relative to the origin I’ve set. If I change that origin then want to return to it later, what coordinates would I use? When would I set them?

I assume there is a way to display absolute coordinates and use that to reposition the origin to an earlier value? Would this be simpler than my proposed solution?

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in the jogging zero screen you can reset the zero stuff so that it shows – and goes to machine coordinates
(by making the zero be the machine zero)

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I assume you do that when the machine is homed?

So in this case I would set to machine zero, go to the desired recorded position by entering the negative of the values I recorded then zero the machine? This is more steps than my proposal, is it better in some way?

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To go to a machine position use G0G20G53X-13.5Y-10.5
G20 is inches, G21 for metric.
G53 tells it to use machine coordinates, rather than workpiece coordinates (implied G54)

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There’s no button, it’s just the text ‘Position’. Click on that to change between work and machine co-ordinates.

It is quite possibly the least discoverable thing ever.

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Thanks! Who knew! I’m now tempted to click on all the text-appearing elements to see what I can find.

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