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General LinuxCNC Questions
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it is too fast to use F200 with G2?
it is too fast to use F200 with G2?
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18 Oct 2021 08:34 #223438
by curran209
May it caused by a time sequence problem, a few CNC senior Engineer analysizied that it caused by Y axis command period long 20ms than than x axis command period.
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19 Oct 2021 00:06 #223512
by andypugh
the result of the calculation v^2/R is 2m/s^2, the max acceleration in my INI is 600,
So, your max acceleration in the INI is 600 mm/s2 and you need 2000 mm/s2. So your machine can not make that radius at that speed. (The machine units are mm)
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19 Oct 2021 03:24 #223515
by curran209
I set x and y max acceleration to 2500mm/s2 in ini, but it more bad.[img]D:\Users\Administrator\Desktop\xhiqi\问题[/img] The above circle is drawed by 600mm/s2, and the below circle is drawed by 2500mm/s2.
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19 Oct 2021 04:00 #223517
by curran209
when i set max acceleration to more smaller, it's to gooder. a =1mm/s2, the effect was almost not too far, but the speed only can to be 120mm/min，it's too slow.
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19 Oct 2021 08:47 #223535
by andypugh
Physics dictates the acceleration required to draw a circle of given size and speed.
Your mechanical design dictates the maximum possible acceleration.
If your machine can not actually accelerate at the required rate then it can't draw the circle.
You need to make your machine lighter and more powerful.
This is entirely a problem with your mechanical design and there is nothing that LinuxCNC can do about it.
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19 Oct 2021 15:23 #223567
by PCW
It could also be a drive tuning issue.
Inability to reach 600mm/s^2 acceleration
with a linear motor is quite suspect.
curran209: Can you attach your hal and ini files?
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20 Oct 2021 01:48 #223613
by curran209
Another CNC control software can use this machine draw circle with setting F6000 and r =5mm.
Does these hal and ini file image enough to analysis it?
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20 Oct 2021 03:27 #223625
by PCW
Where does the joint feedback data come from?
That is, what drives joint.n.motor-pos-fb
or is this open loop
Is there some reason you cannot post the entire hal and ini files?
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General
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General LinuxCNC Questions
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it is too fast to use F200 with G2?
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