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Topics - Jonny5

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General Mach Discussion / Very odd issue. Please help.
« on: March 07, 2015, 05:28:39 PM »
I have a very odd problem I just cannot get my head round. When I use a profile ramping procedure I get an issue whereby the x will stop and ramping will begin short of the correct position. For example if the toolpath is a simple square with multiple stepdowns and profile ramp transitions. The x will travel and to the correct position and begin the profile ramping procedure to the next corner of the square contour toolpath where it again follows the corect position, it will then make the next two corners Correctly, so we have 2.5 sides of the square correct, now the next side, this is where it messes up, it will begin correctly however fall 4mm short and turn the final corner, where it will cut to the first 4mm out of joining up. With multiple depths in the toolpath, this will then cut all the way to end of that line and turn the 3 corners correctly until the final one where it will again be 4mm short.

Now I know this sounds like I'm loosing steps, however the machine return to zero perfectly after the toolpath has ended.

It's got me completely baffled, I have checked the gcode to see if the issue was there but the x values for that cut match on each depth of cut. I have removed all g moves. And repeated the toolpath multiple times over same test piece with the same result every time.

What is making the x stop early on every pass on one side of a square yet it begins correctly and then goes back to 0,0,0 like it's not messed up.

All other milling procedures without ramps are exact.

Completely confused please help!!!

Cheers Jon.

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