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1) You can certainly go to the scale tool in Cura, then uncheck the "uniform scaling" and then increase X by 0.2 or decrease Y by 0.2. This will probably work well for this part. But other cylinders of different diameters or placed on different locations on your bed may need different scaling.
2) One common cause of this kind of error is that the pulleys, which have a hole drilled through the center - have that hole slightly away from center. By maybe 0.2mm. That means the pulley wobbles a bit and the head, if driven at a constant velocity will actually speed up and slow down a little each time the pulley rotates. This error is less common on the UM3 and newer printers as Ultimaker no longer relies on 3rd parties to drill that center hole (I believe). Or perhaps they inspect each pulley now. Anyway the quality is much better than it was 7 years ago.
3) I looked at your part and the STL and I hope you rotate the part so the circle is flat on the bed!?? If not then that is your issue.
4) The problem may be caused by the print head wobbling a bit. Push the print head towards the center of the printer and then gently push the nozzle left/right/forward/back. Push almost hard enough for the steppers to move but not quite. Does it move more in one direction versus another? Sometimes the linear bearing inside the print head is a little loose. The one with the rod that passes from front to rear of printer.
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Here comes Cura 5.9 and in this stable release we have lots of material and printer profiles for UltiMaker printers, including the newly released Sketch Sprint. Additionally, scarf seams have been introduced alongside even more print settings and improvements. Check out the rest of this article to find out the details on all of that and more
We are happy to announce the next evolution in the UltiMaker 3D printer lineup: the UltiMaker Factor 4 industrial-grade 3D printer, designed to take manufacturing to new levels of efficiency and reliability. Factor 4 is an end-to-end 3D printing solution for light industrial applications
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Some thoughts:
1) You can certainly go to the scale tool in Cura, then uncheck the "uniform scaling" and then increase X by 0.2 or decrease Y by 0.2. This will probably work well for this part. But other cylinders of different diameters or placed on different locations on your bed may need different scaling.
2) One common cause of this kind of error is that the pulleys, which have a hole drilled through the center - have that hole slightly away from center. By maybe 0.2mm. That means the pulley wobbles a bit and the head, if driven at a constant velocity will actually speed up and slow down a little each time the pulley rotates. This error is less common on the UM3 and newer printers as Ultimaker no longer relies on 3rd parties to drill that center hole (I believe). Or perhaps they inspect each pulley now. Anyway the quality is much better than it was 7 years ago.
3) I looked at your part and the STL and I hope you rotate the part so the circle is flat on the bed!?? If not then that is your issue.
4) The problem may be caused by the print head wobbling a bit. Push the print head towards the center of the printer and then gently push the nozzle left/right/forward/back. Push almost hard enough for the steppers to move but not quite. Does it move more in one direction versus another? Sometimes the linear bearing inside the print head is a little loose. The one with the rod that passes from front to rear of printer.
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