Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: fowlerpb on May 17, 2007, 11:45:09 AM
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I apologize, but I have misconfigured my Mach3 and searches through the forums, etc are not helping.
On my Y axis, once I enter the Edge Finder Dia, move my tool to the side of the work, and select the edge, the offset from the tool is applied in the wrong direction. My 0 gets moved farther away from the work.
My first thought was that I was selecting the wrong edge in the offsets screen, but both edges apply the offset in the same wrong direction, or am I becomming senile? To fix this, I have been entering G01 Y1.25 and zero Y again. It hasn't caused a problem except for annoyance.
A final question: I am new to CNC milling but I would have expected the scale on my Y axis of the sherline mill to match Mach 3 machine coordinates for Y. Instead, it is reversed. As the end mill moves in the +Y direction (which as I look at the mill means the end mill is moving away from me) for Mach3, my Sherline mill scale moves in the -Y direction. It is only an annoyance, but it means that I have to home my Y axis at 7" instead of 0". Am I completely reversed somewhere? Am I looking at my milling machine sideways or something? I can't imagine I am doing this correctly.
My X axis is working as expected for both edge finder dia and the movement of the endmill in the X direction matching the scale on the X axis.
Thoughts? And thank you,
Fowler
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Have a look at this thread.
http://www.artsoftcontrols.com/forum/index.php?topic=1725.msg9977#msg9977
Graham.
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Thank you, I think that helps. If I read that post correctly, then my end mill is properly moving in the Y direction away from me and Sherline simply has their scale on their machine backwards from a CNC perspective.
I am not screwed up, but Sherline is. I still find that hard to believe.
I am still not able to figure out why the edge finder dia offset is causing the Y axis to compensate towards me which would be a negative move in the Y direction. I have been touching my "work" on the top, left side, and the side closest to me. I do that because the origin (0,0,0) is hypothetically on the top (Z), left side(X), and side losest to me(Y).
Somewhere, as a newbie, I am wrong. I just need someone to slap the side of my head or I simply need to experiment even more.
Fowler
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If you have 1.25 in the edge finder dia, what happens if you enter -1.25 in the dia?
Graham.
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Interesting concept...
I don't know, I will try a negative diameter as soon as I get home in a few hours and let you know.
:-)
Fowler
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I GOT IT!!!
I was actually clicking on the picture of the end-mill instead of the "Select" buttons.
My guess is that the end-mill photographs have to do with moving away from the origin, which is why X was increased and Y was decreased...
I think I get it now.
Thank you for spending time to read this and trying to help. As a note, the negative entry for the diameter has no effect. It appears that the software uses the absolute value of the edge finder diameter.
Again, Thank you,
Paul Fowler