how to speed up curve-movement?

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19 Nov 2019 10:27 - 19 Nov 2019 10:29 #150627 by giantstone
Hi, my cutting machine can do arc movement rapidly,
yet it's very slow when it comes to drawing a curve ( consists of a series of points) .
could anyone help me to improve its speed at drawing curves?

i attached the g-code in my experiment, changing the feeding rate did not help much.
the slow parts are the "g01 xxx g01 xxx g01 xxx g01 xxx g01 xxx ”.

File Attachment:

File Name: lines_cutting.ngc
File Size:324 KB
Attachments:
Last edit: 19 Nov 2019 10:29 by giantstone.

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19 Nov 2019 14:42 - 19 Nov 2019 14:46 #150649 by pl7i92
the interpreter reads only 3lines ahead max is 10 lines on feather
so why are there small g01
normal postprocessors output only a min of 5m dist per line
or a G02/G03
you can get more speed on G64 P0,1 this will round the lines together
be awar on a high value Metric 1.0mm G64 P1
a 90deg Corner at 5000mm/min turns into a R20 Radius

THIS IS A 4th AXIS G-code
so your ACC of the 4th Axis might be so slow
can you get the INI inside
look here at 2:35min
its ACC 1200Deg/sec²
Last edit: 19 Nov 2019 14:46 by pl7i92.

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19 Nov 2019 22:49 #150686 by Hakan
Just look at some of the first lines of g-code
G01 A 312.274  X 204.0 175 Y 6471.0 47 Z -36.0  
G01 A 312.614  X 205.0 176 Y 6472.0 48 Z -36.0  
G01 A 311.669  X 206.0 177 Y 6473.0 49 Z -36.0

What are those number 175, 176, 177 and 47,48,49 etc? Are they part of the X/Y coordinate - I didn't know there could be spaces in a number. Get rid of them. Or concat it into the number, whichever it should be.

Because these are moves that involves both A and XYZ coordinates the naive trajectory planner will be used and only one line of lookahead. I would think it is difficult to keep doing mm-long moves at 10000 mm/min with that trajectory planner.

I see two options, not very good ones. Don't use A axis. Or, optimize the g-code to take as long and few steps as possible.

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19 Nov 2019 23:21 #150691 by tommylight
Change the post processor or CAM software, that is not normal gcode.

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20 Nov 2019 00:27 #150701 by Leon82
Is there a filter option for your tool path?
Usually you can convert to arcs on some cam systems

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