pieri70
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Posts posted by pieri70
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On 6/21/2019 at 4:31 PM, yellowshark said:
No, I fine tune by printing a length of filament and measuring the filament on the print bed. Lol as you say you cannot get that accurate with a pencil!
I Still don't understand this method.
How can you measure the length of filament pushed by the extruder by measuring it on the print bed once it's printed?
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Quote
Lol, yes and don't know. The process you use for calibrating the extrusion length is pretty much the same as me except that I look for tighter tolerance, say 50 microns not <1000.
How do you measure 50µm filament length? I mean, how can you take such precise measure from the entrace of extruder to a given length of filament? I use the caliper and a pencil but the trace of pencil is larger than 50µm..
QuoteWhen I start the calibration I do not extrude filament, I measure the movement of the nozzle and once I think the calibration is good I validate/fine tune the calibration by printing and measuring filament.
You mean movement of the extruder?
QuoteWall thickness and over extrusion. Not a simple subject but my view is that you are probably not over-extruding and my suspicion is that you nozzle diameter is 0.44 and therefore your Cura settings are wrong and line width and nozzle should be set to 0.44. I may be wrong but all I can say is that I had exactly the same thing a couple of years ago and corrected my Cura settings to 0.45 and saw improvement in my surface quality. It is probably worth pondering on this and trying some tests.
Nice point! I never thought about it..
But I think that if you change your nozzle diameter you obtain something similar to change your filament diameter..
I mean, if you tell Cura that you want to print a .40mm wall with a .44 nozzle you are saying Cura to lower the filament extrusion, and this is similar to tell Cura to print with a larger filament, isn't it?
QuoteSomebody, I think @geert_2, machined himself a probe with increasing diameter so that he can measure the internal diameter of his nozzle.
Wow! Madness ;)
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On 6/19/2019 at 2:47 PM, yellowshark said:
When you say "...if a filament always over-extrudes" I would say it does not, you always have the wrong settings.
What I usually do is set the correct filament extrusion length and steps/mm measuring with a caliper the length of filament extruded by the machine at printing temperature.
When I'm sure that when I tel my printer to extrude 100mm it extrudes 100 mm with less than 1 mm error I save my steps/mm into eeprom so these will be my correct steps/mm for that particular extruder for all my filaments.
Then with a given spool of material, exmple PLA 1,75mm orange, I perform a thin wall calibration, that is a cube with single wall shell @known wall line width (ex 0.4mm) no infill and .
If with these settings I obtain a wall 0.44mm thick I'm in overextrusion and I assume that this kind of filament is alwais printing like this if I don't correct with flow or filament diameter or extrusion multiplier or whatever it is called.
So in this particular case 0.40/0.44 is 0.91 extrusion multiplier in S3D word or 91% flow in cura.
In my case using Cura I correct the filament diameter (1.75mm) in material management that is the opposite (0.44/0.40)*1.75mm=1.92mm
Are these wrong settings for you?
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16 hours ago, gr5 said:
It's called "flow". If you set flow to 200% then that is the exact same thing as "material multiplier=2". It will increase the extrusion values by whatever you set the flow to. It will *not* create a "flow" gcode. It will just increase all the extrusion values by the flow value in cura.
Yes, but as I said above that works on profile level. What I mean by multiplier is something relative to material (filament) setting.
Let's say a given kind of filament always overextrudes. It is more reasonable to have an "extrusion multiplier" at filament setup level not at profile level.
What I usually do, after fine tuning steps/mm for the extruder, is to print a sigle wall/well know thickness hollow cube, I measure and compare what I set as wall thickness and what my printer executes.
With this I have a ratio between the real and desired thickness, that is an extrusion multiplier.
This is good for a given kind of filament printed at a given temperature with a given speed, but I'm lazy so I consider it for my filament @print temperature.
Then in S3D I used this ratio that is coupled with a given filament.
In Cura there is not this option, so I change filament diameter, that is the same.
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On 12/19/2018 at 2:17 PM, ahoeben said:
Cura has a setting called Material Flow, which does exactly the same as an extrusion multiplier in the slicer.
Yes but that works on profile level. What I mean by multiplier is something relative to material (filament) setting.
Anyway if you change the filament diameter in filament settings you achieve the same result as a multiplier variable
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System specs for you?
I'll try with my sister macbook air as she will come and see me. It's last year model..
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The problem was with both mac os el capitain and high sierra.
So I think much of the problems are by cura itself..
It's a pity.
I'll get stuck with Idea Maker
Thanks
Pietro
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The problem for me is after program charging. Any click on GUI halt cura for at least 7/10 seconds Each time. Then layer view is almost unresponsive. 🤐
What happened after 3.4.1? That is the last version that is working fine
I saw that development moved to a newer version of QT. Could this be the problem?
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In my case I just installed osx high sierra. All other slicers are working fine (S3d, idea maker, Slic3r PE etc.)
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16 hours ago, leliep said:
Similar for me. On my 2018 MacBook Pro it takes about 2...3 minutes to start up, using 100% CPU. During this time it displays "updating configuration", before it eventually shows the GUI and becomes responsible. This behavior is reproducible. I guess Cura 3.6 needs some kind of serious tuning 😉
Btw., I like the Gyroid infill!
I can confirm, cura starting from 3.5 version is unusable on macbook air 2011.
I just installed the 3.4.1 version and it's a lot better. Normal cpu usage during slicing and rotating view specially in layer view.
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Hello
Cura 3.6 is unusable on a macbook air 2011 I5 1.7Ghz 4GB RAM 256GBSSD with mac os high sierra just freshly installed.
In Solid view if I don't do anyting CPU stays at 3-4%. As I click anywhere it jumps @150% making any selection/option really slow.
In layer view once the stl is sliced CPU is 120% all the time.This was also for cura 3.5.x
In 3.4 I think it was better
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Hello @Deneteus
I just downloaded and installed Cura 3.5
Now I'm using Ideamaker as my preferred slicer
I tried to slice the same stl with the same settings where possible
Ideamaker makes my gcode 47600 lines while Cura 3.5 makes a 68600 lines one.
I like the way Ideamaker slices my stl and travels/movements seem to be ok
I must check what this new Cura version makes but the gcode volume seems to be a little too much..Bie
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Hello
after the release of Cura 3.4 I tried another shoot.
I attach gcodes for the same stl, two pieces in a single build plate.
I made slicing settings as similar as possible (wall thicness/lines, top bottom layers, infill percentace/pattern etc.)
Cura gives me 7.24 h print time, S3D 4.32 h
If you open both Gcodes with notepad++ you can see cura's one is 343272 lines while the one generated by S3D is 138115 (less than half)...
Is this normal?
ThanksPietro
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I found this in 4.0 app
[toolchange_retract_distance]
[toolchange_prime_distance]
[retract_speed]
[travel_speed]
[current_position_x]
[current_position_y]
[next_position_x]
[next_position_y]
[next_position_z]
[previous_direction_x]
[previous_direction_y]
[previous_direction_z]
[next_direction_x]
[next_direction_y]
[next_direction_z]
[average_direction_x]
[old_tool]
[new_tool]
[toolchange_retract_speed]
[extruder0_temperature]
[extruder1_temperature]
[extruder2_temperature]
[extruder3_temperature]
[extruder4_temperature]
[extruder5_temperature]
[bed0_temperature]
[bed1_temperature]
[bed2_temperature]
[bed3_temperature]
[bed4_temperature]
[bed5_temperature]
[total_filament_used]
[extruder0_filament_used]
[extruder1_filament_used]
[extruder2_filament_used]
[extruder3_filament_used]
[extruder4_filament_used]
[extruder5_filament_used]
[total_filament_weight]
[extruder0_filament_weight]
[extruder3_filament_weight]
[extruder4_filament_weight]
[extruder5_filament_weight]
[total_filament_cost]
[extruder0_filament_cost]
[extruder1_filament_cost]
[extruder2_filament_cost]
[extruder3_filament_cost]
[extruder4_filament_cost]
[extruder5_filament_cost]
[total_print_time_sec]
[build_size_x]
[build_size_y]
[build_size_z]
[total_layer_count]
[fan_speed_percentage]
[progress]
[current_Z_position]
[current_layer]
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Hello Any news on this topic?
I mean, does S3D 4.0 have these same placeholders?
Is there some way to get the temperature at current layer to make a tool change script?
Thanks
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Yes sorry ?
Here are 2 screen captures
Cura 3.3.1
S3D 4.0.1
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Hello
the two gcodes are 10GB each, how can I give them to you?
Thanks
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Hi Stuarts I know there is that parameter.
But if you set flow (Extrusion multiplier) with that parameter you have two options:
- crate a profile for each material, so for example you will have a profile to print PLA yellow, PLA Orange, PETG xxx with the same speed and layer height only because they have a different "slip behaviour" or because they have a slightly different diameter
- remember which is the flow for each material and change it every time you change profile
Using a "flow" or "extrusion multiplier" linked to each material in materials library will solve this problem.But again, changing a little the diameter for a given material in material library will solve this problem.. -
Hello
yesterday I printed a quadcopter little frame and I observed still a lot of unnecessary (IMO) movements
I'm with CURA 3.3.1 on MacOS
Cura jumps a lot around to print walls and supports and I think infill too..
I ended up using again S3D because I think it has a better planning sequence.
Could you please list which parameters I must check in Cura to reduce travel movements?
Thanks
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Thank you gr5
I fine calibrate my extrusion multiplier using a speed (60mm/s) that I use for most of my prints with 0,2mm layer thickness.
That is the maximum speed I use and temperature is a constant value, I fine set it after some printed pieces, considering how they result in terms of smoothness, layer adhesion etc..
In this condition material slip in the feeder will be more or less constant and it will depend on material characteristics.
In Simplify3d extrusion multiplier is coupled to material. So for a given profile you get different extrusion multipliers (flow) if you change filament.
In Cura there is no parameter called "flow" or "extrusion multiplier" in material management.
Anyway that isn't a big problem because I can set different diameter for my custom filament.
The result, at the end, is a change in material flow.
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Thank you I see
This parameter is is relative to material or to profile?
I mean, Flow should be linked to material and it shouldn't change changing profile if material is the same.
Am I Wrong?
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Here a particular
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Hello
I'm learning using Cura, I'm on MAC and I'm trying to slice a multicopter frame which has many hanging parts so it needs a lot of support.
I configured Cura so it generates support but there is a strange thing occurring
In areas without hanging parts Cura generates a lot of support small islands, so my printer moves a lot around without need.
This happens for 5/6 layers (0,15mm layer height)
Why is this happening?
I thought it was a damaged stl file, but I passed it trough netfabb online repair tool and nothing changes..
Here is a snapshot
Thanks
Feature request - Extrusion multiplier - where is it?
in UltiMaker Cura
Posted
Ok, Got it now..