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我就是你嘴里的2b。下面是国外论坛上的,你个卖usb卡的试试看这行代码:G31 Z-1 F100
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4 H) [, j. }& m5 x1 b, OPostby stephan » Wed Sep 26, 2018 5:39 am [size=1.3em]Just wanted to add a little bit of info to this thread, given that my issues with aircuts and probing on a USB cnc mill (6040z) on Mach3 led me here.
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5 M3 U* b& q4 p6 M( oWhat I've noticed is that "G31 Z-1 F100" sometimes ignores the probe contact and crashes into my PCB . To resolve this issue I just had to increase the probing depth, i.e. "G31 Z-5 F100". Once I made this change the over-probing and crashing was resolved. It appears that the USB controllers for these chinese cnc machines act weird if the G31 command limit (i.e. Z-1) is not far enough beyond the workpiece/PCB/Probe. Whether the #2002 variable was saved properly is not something I checked for.1 ~8 ]1 D/ Q. s4 W8 v
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Another note to add, start the variable count at #601, as #601-#999 are reserved for user variables in Mach3.
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Also, make sure you have high quality bits. This will also help resolve aircutting issues, as the cheaper V-shaped engraving bits (from eBay or Amazon) tend to bend or break during the milling process. A small ball or square end mill produces much more reliable results. I personally use Melin Ball End mills, at sizes 0.016" and 0.009".1 j" y$ ^ a6 Q# L( W l. Z
4 Z5 C% L" ^7 U( RHope this helps someone else out there with a similar issue. ! B2 b4 _! R# q; X3 d/ A; ]
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