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Jabbery

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  1. Thanks, yes I have used that feature. It does save a bit of time on the infill but only the infill. Using that feature the remaining features would all be printed at the finer layer height which is too slow. Infill layer thickness would though save more time if only the visible perimeters were in 0.1mm thickness, line thickness 0.4mm and infill 0.8mm (nozzle size dependent). For example on a stronger part with say 4 perimeters and 40% infill. Only 1 of the 4 perimeters would be at the fine height for cosmetic reasons. Many models I print have no requirement for inner
  2. Hello, A feature suggestion to make faster and better looking prints is to adjust layer height on visible surfaces while leaving layer height on inner surfaces. In the cura preview this is red in color that I am suggesting to adjust for finer layers. Example, with a 0.8mm nozzle one could have inner print areas at a layer height of 0.6mm while setting the visible surfaces to 0.1mm. On a layer change cura could adjust the layer height and print the visible (6 layers in this example) at 0.1mm and then continue from that final nozzle height at 0.6mm for inner areas and i
  3. I think I tried that but I will give it a shot over the next 24 ish hours, I have a 24 hour print running now.
  4. Ah Jerk is a misleading term it is actually instantaneous speed change but that does not really explain it either. Weird term, I see it is actually a minimum target speed to decelerate to before a direction change to reduce stand still time and offload the amount of side energy on the frame/structure during a path change..
  5. Thanks JCD, I seen that item and its information is not clear as to exactly what it does, I will test it when I have a moment. I had to complete that project and move on by doing 2 different models in F360. I did however run a number of other tests that are all inconclusive as per the cause of the problem. I attempted to eliminate something about the printer as well as the slicer. In testing multiple slicers there was variation in the inner perimeters but none were correct. I also tested multiple speeds as a possibility it was caused by too much acceleration causing de
  6. Hi JCD, I configured as you suggested, with the flow back to 100% the outside perimeter is exactly 100mm. The inside perimeter has some variation of 92.3 - 92.66, back to the 0.94 - 1.3 mm off.
  7. That was the latest test version I just hit save on for you. Originally the infill was the default as per a previous message of settings. Concentric was tested to see if there was an issue with the diagonal lines causing extra filament flow buildup pushing out the perimeter. I had noticed on a print or 2 that infill often has a bit of buildup at the start of the path. On the cooling fan I actually have no idea on ABS but I have had the best success with that setting. I basically searched the internet for settings for ABS and found 30-100%. What setting for
  8. CFFFP_100x100x3mm test.3mf Here is the latest copy I was messing with. I have a brim 8mm outside to make the ABS stick Measurements I took were on the top 2mm to eliminate any 1st level/brim errors.
  9. On this project no. I have had the same difficulty with PLA on other projects, they were also more simplistic like simple mounting plates so it was no problem and low risk of error to re-draw the model for printing or machining. This project has multiple items that mount on X, Y and Z axis (no diagonals thank god). The final part will be both printed in ABS and machined from Aluminium. They want both. So we thought we would just work with the end material to fine tune settings.
  10. Just a point of interest and who knows it could be a trick. The latest Makerbot commercial in Youtube they focus on their printers/software do not have this problem. They show a part printed on their printer and a competitors printer that a large bearing fits into the part, the bearing fits in their model and not in the competitors.
  11. I ran 3 test prints of the 100mm x 100mm box with a cutout of 93.6mm. I used 93.6 because the remaining border is 3.2mm is 8 lines exactly at .4mm line width, with offsetting inner and outer tool paths of 0.2mm there is 7 lines exactly remaining. Measurements should be outer 100mm, inner 93.6mm Note: The initial test at 100% flow the outer measurement was 100mm, filament feeder is calibrated at 100mm of feed with calipers. Gcode was generated twice for each infill pattern, flow rate was adjusted at the printer. Cura Settings: Layer Height 0.2 Initial
  12. Oops I should have seen that since I even calculated it. I was following the same order as the outer wall I suppose. I'm not sure I follow the thought of extrusion seeping into the open space. If the amount of space to fill is calculated and the feeder is calibrated the overflow should be minimized (assuming exactly 1.75mm filament). Seeping by 0.2 mm or half the line width would mean the seeping causes the extruded line to be 0.6+mm wide without losing the layer height. The actual measured inner space is 92.75 mm measured on both X & Y in the corners and in the center. It shou
  13. Thanks, excellent explanation and great area to explore. It does not look like that is the case in my cura gcode file. I verified the cura 4 settings and it is 0.4mm line width,2 perimeters,100% initial layer line width. Filament feeder is calibrated with 100mm of filament feed. No visible over extrusion. this is a 100mm x 100mm as I mentioned above box that is 3.2mm wide and 3mm high. Basically a hollow box. 100mm with 93.6mm empty space. ;TYPE:WALL-OUTER G1 F3000 E160.37867 G1 F1800 X103 Y197 E164.97456 G1 X197 Y197 E169.57044 G1 X197 Y103 E174.1
  14. This is true it is the inner perimeters that I am having a problem with. Outer perimeters seem to be compensated. To test Draw a box 100mm x 100 mm (larger is easier to see the error) Draw a box inside (offset) 90mm x 90mm This will leave you with a 5mm wide path around the perimeter Extrude this 5mm path 3mm (for fast print) Measure the X and Y outer perimeter. If your printer is tuned it will be exactly 100 x 100. Measure the inner space, it should be 90mm but it is not! It is out 1 filament line width (1/2 width on each perimeter wall).
  15. Thanks for the idea, we just started doing this in F360 using a user perimeter to offset inner perimeters so we can set it to zero for other processes but it is no where near as simple as that in the modeling stage. It does seem like a lot of extra work that can get very complicated with many variable slicer settings making this impossible to do outside of the slicer. It seems a little odd to me that the slicer does not reproduce dimentional accuracy and it has to be manually adjusted causing all types of issues with items like adaptive layers that will then throw any
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