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Messages - arronpatton

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General Mach Discussion / Re: More Z-axis difficulties...
« on: October 22, 2012, 02:02:23 AM »
OK, so i set my z velocity and acceleration to 50% the original value and it looks as tho that may have prevented the sudden and random plunge into the material. But now it has a gradual and steady plunge through out the entire cut. I generaly only cut very small items usually between 3"x3" and 6"x6" but have started to broaden my horizens a bit and have moved up to larger cuts. The project im working on now is still only 24x24 but I have it tiled to 12x12 pieces. The design is a 2.5d decorative piece that starts out cutting .01" below the surface as to not leave any flat spots with a max plunge of .2". By the time i get to the end of the first 12x12 tile my max plunge is still .2" but my z zero went from .01" to .04". When i tell the machine to return to zero mach tells me im at zero but the tip of the bit is .04" deeper than whats its suppose to be. The x and y are spot on and I never have any issues with them. I did forget to mention that a while back my stepper driver went a little weird on me and out of nowhere my z started getting very twitchy and would make funny noises when jogging. I slaved the A to the Z and have been running it that way for the past few months without problems until now when i started doing larger cuts. Thanks Rich for the advice earlier! Im hoping you might have a few more tricks up your sleeve for me!

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General Mach Discussion / Re: More Z-axis difficulties...
« on: October 21, 2012, 07:53:30 PM »
Not that im aware of but I will double check just to be sure. Can we think of anything else that may cause the problem?

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General Mach Discussion / Re: More Z-axis difficulties...
« on: October 21, 2012, 06:39:32 PM »
was anyone able to come up with a solution for this problem? I seem to be having the same issue and being fairly new the the cnc world im far beyond lost at this point. I have found that my z axis loses its zero and will plunge into the material farther than the original z limit was set. Ive seen a few other people on here have had the same issue but nobody has posted anything saying they found and resolved the issue. Im only have the problem on large cuts where the machine time is around an hour or more. Can anyone think of anything? Also, if someone does reply please dont be afraid of dumbing down the answer as low as possible. I promise no feelings will be hurt.

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Hey guys. Can anyone explain to me why is it that when I load a file from Vcarve that is suppose to be only 10" x 4" into Mach that it shows up on my table display as something much larger and causes my machine to crash. Im having a very hard time figuring out how to get it to the proper size. Any help is much appreciated.

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