Rounded corners and "rounded down".

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10 years 8 months ago #70514 by aparecido
Hello, I posted a little while a topic about a problem he was having with latency and it was resolved, now I have another problem, to simulate the operation of the G code sample that opens with the LinuxCNC, it happens what is in the picture below, the tool moves before reaching the surface of the material to be milled, the corners are rounded, begotten g pci'se code is the same 'problem', I changed the speed of the shaft and does not solve.
  Detail I am simulating the code in the program did not call the machine because I want to let all of software and ready configuration to avoid problems.
  Has some setting or option should I enable / disable to change this?
  Thank you.

image missing http://s21.postimg.org/nj5zjp31z/print_cnc_Copia.jpg
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10 years 8 months ago #70519 by BigJohnT
Depending on the update frequency of the monitor is how accurate the tool path is represented in the back plot.
And: linuxcnc.org/docs/2.7/html/user/user-con...#_trajectory_control

JT
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10 years 8 months ago #70524 by aparecido
So I tested now tried with G64 P0.0125 code and it did not work, I tested with F1500 G61 code and also did not work, the simulation also takes place as the image above. Researching the topic, I read that in the Mach3 has an option that changes the rounding of the corners (if I did not wrong), in LinuxCNC / EMC2 does not have an equal option? Thank you.

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10 years 8 months ago - 10 years 8 months ago #70540 by BigJohnT
G61 is exact path mode, if your monitor is slow it may not update well. Try a real slow speed with G61. I ran the splash screen on my computer and get perfect square corners right out of the box. Did you run the latency test?

JT
Last edit: 10 years 8 months ago by BigJohnT.
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10 years 8 months ago - 10 years 8 months ago #70548 by aparecido
Hi, so I downloaded the movement speed, literally almost stopped and the same thing happened. The latency you test was less than 17,000 with various things open, including mp3, videos, programs etc.
Can post example of how to use the G61 and the G64 command to identical test your test? Thank you.
Last edit: 10 years 8 months ago by aparecido.

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10 years 8 months ago #70559 by Rick G
Something like this...
Code:
% G17 (xy plane) G20 (inches) G40 (cancel cutter radius compensation) G49 (cancel tool length offset) G90 (absolute distance mode) G94 (units/min feed rate) G64 P.001 Q.001 (set path tolerance) F10 G0 XOYO G1 X5 G1 Y5 G1 X0 G1 Y0 %

When you are in MDI mode the active g codes will be listed on the lower left of the screen.

Rick G
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