## a Mach 3 probably simple question

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### a Mach 3 probably simple question

Hi,

Now that I have my homing sensors set up I can begin my day's work at a X=0 Y=0 baseline. From there I will want to start my Aspire project at, say, X=2 Y=2. Is there a way to, using Mach 3, be able to input for the cnc to go to X=2 Y=2? I've tried using the jogging function and it is nearly impossible to line it up exactly at that point. There is probably a very simple explanation.

Thanks,
Mazzy
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### Re: a Mach 3 probably simple question

Hi Mazzy,

Go to the second tab at the top of the Mach screen...MDI I think.

On that page there is an area to input Gcode commands.

Put in G0 x2y2 and hit return...

Jeff
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Mach 3

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### Re: a Mach 3 probably simple question

Thanks Jeff...seems simple enough.

Mazzy
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### Re: a Mach 3 probably simple question

Mazzy,

Another Mach3 thought for you. Usually I home my machine (Ref All Home) first thing...that will establish the zero points for the machine coordinates. Then I manually jog the machine to my start point. Next I will write the start point machine coordinates on a piece of paper, in case I need to re-establish the same center point later. Lastly, I switch the display to table coordinates, and zero x and y...then go from there.

Angie

zeeway
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### Re: a Mach 3 probably simple question

Angie,

What is the difference between machine coordinates and table coordinates? How would I switch back and forth?

Mazzy
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### Re: a Mach 3 probably simple question

Mazzy,

Machine coordinates set X/Y zero when your machine triggers its homing switches. So if you have limit switches, and click on "Ref All Home", your machine will move toward the direction of x=0, y=0 until it hits the homing switches, at which time it will set x=0, y=0 in the machine coordinates. You can think of machine coordinates as a x/y grid that starts from your gantry/router position when it is in the final "ref all home" postion.

Mach 3 can also keep a second grid in its head from the zero you set when you move your gantry/router to the position to correspond with the zero you set in your Aspire design in the material screen. Typically I set x/y=o in the center of my material. So after "ref all home", with the machine coordinates x/y=0, I move the axis to the center of the material, and click on x next to the digital read out, and y next to the digital readout, which sets x/y=0 in the work coordinates that measure everything from this new origin. Under the Digital readout (DRO), there is a button that is labeled "Machine Coords", if you click that it will go back and forth between the machine coordinates and the work coordinates. When the little red marker is lit under this label it means the read outs are showing machine coordinates.

Angie

ps - you can download the Mach3 manual from the ArtSoft website, and it will explain this and everything else much better than I can...
http://www.machsupport.com/

zeeway
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### Re: a Mach 3 probably simple question

Thanks Angie,

Very good explanation. I've printed out and perused the manual but, not being a computer or electrical engineer, it is a bit on the difficult side. I'm sort of burrowing through it as I learn more about the whole of cnc.

Thanks...this help to fit a couple more pieces in the puzzle.

Mazzy
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### Re: a Mach 3 probably simple question

mazzy wrote:Angie,

What is the difference between machine coordinates and table coordinates? How would I switch back and forth?

Mazzy

You might want to watch the "Homing, Limits and Offsets" video here.
http://www.machsupport.com/videos/
Gerry
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