Feedrate, Acceleration, and Max Speed. September 09, 2017 11:17AM |
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Re: Feedrate, Acceleration, and Max Speed. September 09, 2017 11:19AM |
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Re: Feedrate, Acceleration, and Max Speed. September 09, 2017 09:09PM |
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Re: Feedrate, Acceleration, and Max Speed. September 10, 2017 12:18AM |
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Re: Feedrate, Acceleration, and Max Speed. September 10, 2017 07:31PM |
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Re: Feedrate, Acceleration, and Max Speed. September 11, 2017 02:14AM |
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Re: Feedrate, Acceleration, and Max Speed. September 11, 2017 02:58AM |
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Re: Feedrate, Acceleration, and Max Speed. September 11, 2017 03:12AM |
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Re: Feedrate, Acceleration, and Max Speed. September 11, 2017 03:29AM |
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Re: Feedrate, Acceleration, and Max Speed. September 11, 2017 04:49PM |
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Re: Feedrate, Acceleration, and Max Speed. September 11, 2017 09:43PM |
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Re: Feedrate, Acceleration, and Max Speed. September 11, 2017 09:51PM |
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Re: Feedrate, Acceleration, and Max Speed. September 12, 2017 02:25AM |
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Quote
jmrobert48
Actually, the steps/mm, acceleration, jerk as well as other values can be changed in the g-code. After the printer behaviour is characterized, the changes can be made on a print by print basis, if needed/wanted.
Quote
691175002
In practice you often want printer velocity to be as constant as possible because the extruder responds very slowly. Even if you are applying fast and fine control to the filament being pushed into the melt-zone, the melted plastic will respond slowly and come out at an averaged rate. If the printer is wildly varying its speed it will be placing a lot of plastic in slow areas, and not very much plastic in fast areas.
Pressure advance can probably overcome this effect at low accelerations, but at some point the control bandwidth of melted plastic is just too far below that of the positioning system.