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What is the real 3D printing speed at Ultimaker 2?
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· What is the real 3D printing speed at Ultimaker 2?
Well your answer changes depending on version of cura. There are "hidden" settings in cura 2.* that you can expose by clicking on the gear. It's probably there that you are having problems.
Printing speed is convered into the "F" command (for feedrate). Unfortunately that is in mm/minute. Not mm/sec. So multiply and divide by 60 to convert back and forth. So after you slice, open the gcode file and search for those F commands. Some control Z movement so ignore the ones on Z only or E only moves. For example:
G0 F600 E1000.473 <-- that says to change speed to 10mm/sec (60*10) and then move to extruder position 1 meter plus .473mm (the extruder value tends to just keep increasing forever). Whereas
G0 F6000 X10 Y10.1 <-- that speeds things up to 100mm/sec and tells where x,y should go.
The infill is often done at a different speed as some of the shell and the outermost shell is often a third speed. You can see this both in cura and in the gcode file.
Now on the printer itself you can set the % speed. This takes those F values and increases them by the percent you say. So set it to 300% to print 3X as fast or 10% to print 1/10 as fast.
There are a few exceptions! In cura there is a minimum layer time. Typically 5 seconds. If you are printing something very small it might normally print that in 1 second so cura slows it waaaay down. This is likely your issue.
Also due to accelration limits short line segments never actually reach the feedrate. So sometimes changing the % doesn't speed things up as the feedrate is the GOAL speed, not the actual constant speed. Although usually the goal is reached on most printed shapes.
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gr5 2,330
Well your answer changes depending on version of cura. There are "hidden" settings in cura 2.* that you can expose by clicking on the gear. It's probably there that you are having problems.
Printing speed is convered into the "F" command (for feedrate). Unfortunately that is in mm/minute. Not mm/sec. So multiply and divide by 60 to convert back and forth. So after you slice, open the gcode file and search for those F commands. Some control Z movement so ignore the ones on Z only or E only moves. For example:
G0 F600 E1000.473 <-- that says to change speed to 10mm/sec (60*10) and then move to extruder position 1 meter plus .473mm (the extruder value tends to just keep increasing forever). Whereas
G0 F6000 X10 Y10.1 <-- that speeds things up to 100mm/sec and tells where x,y should go.
The infill is often done at a different speed as some of the shell and the outermost shell is often a third speed. You can see this both in cura and in the gcode file.
Now on the printer itself you can set the % speed. This takes those F values and increases them by the percent you say. So set it to 300% to print 3X as fast or 10% to print 1/10 as fast.
There are a few exceptions! In cura there is a minimum layer time. Typically 5 seconds. If you are printing something very small it might normally print that in 1 second so cura slows it waaaay down. This is likely your issue.
Also due to accelration limits short line segments never actually reach the feedrate. So sometimes changing the % doesn't speed things up as the feedrate is the GOAL speed, not the actual constant speed. Although usually the goal is reached on most printed shapes.
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