remiol
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Posts posted by remiol
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5 hours ago, tinkergnome said:
The PTFE coupler is a consumable and has a limited lifetime. This would be my first bet.
Some details:
https://ultimakernasupport.zendesk.com/hc/en-us/articles/115004429006-When-Should-Parts-Be-Replaced-
Person which sold me 3d printer replaced it during by presence. Plastic tube was not bad as I remember, but tomorrow I will check once again. I dont know really what can be other issue than extruder... olsson block issue? I dont think so...
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19 minutes ago, gr5 said:
Steppers do not get old. It's not the stepper.
With 4kg of force you can do about max 10mm^3/sec through a 0.4mm nozzle. Bondtech I believe claims 18mm^3/sec with a 0.4mm nozzle. Nozzles twice as large can pass about 4X material. Nozzles 1.4X can pass about 2X material.
To calculate volume (I reported volumetric speeds - not linear), multiply line width (0.4 for 0.4 nozzle) by layer height by print speed. for example 0.4mm nozzle with 0.3mm layer height with 40mm/sec print speed gives you (40 X 0.4 X 0.3) - I'll let you enter the numbers in a calculator for practice.
Thanks for info, good to know. I have problems with 60mm/s, 0,4nozzle and 0,2 layer. Its 4,8mm3/s. When I am trying 0,1 layer, it is OK, but not with all materials. I am cleaning from time to time the nozzle with cold/hot pull. I had similar problems on ender 3 pro, solved by metal extruder for 5$.
What is your opinion? What can be other root cause of under extrusion? I must print very slow to do not have under extrusion.
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1 hour ago, gr5 said:
I have 5 um2 printers. One has "plus" feeder, 2 have "medusa" feeder, 1 has original feeder, 1 has bondtech.
I like the medusa the best and it only cost $19. I have characterized the pulling power off all these feeders and I don't have my notes in front of me but they go something like this:
original: 4kg
medusa with iroberti: 8kg
plus: 8kg
bondtech 10kg
This is (very rough - from memory) the amount of force (weight) that the feeder can lift if you only insert filament half way down the bowden.
I have printed thousands of hours on the "original" and it has enough force for me but there is definitely an improvement with the other feeders. The extra power from the bondtech doesn't interest me and it's harder to slide filament in and out (the original feeder - you can't slide filament in and out at all - you have to use the menus).
Thank you very much for your info! I will think about this once again. What is max speed in mm/s on 0,4 nozzle and height 0,3? Are you able to achieve speed 120mm/s on bondtech or medusa?
Please only note that I see that my stock extruder does not have enough power - worned motor/extruder? I tried to put by octoprint 50mm extrusion, but I see (measured by calipper), filament moved less than 45mm on very low speed (on higher speed it is worse) - I can see that few milimeters extruder does not have enough power and filament was not moving always.
Whats your opinion? When I print slow - all is OK.
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27 minutes ago, gr5 said:
I don't have a feel for your budget. If you don't mind spending 500 euros you should definitely get the plus upgrade kit. If you are trying to save money, the two upgrades most worth it are the "plus" feeder (you can get a meduza upgrade for just $19 that's just as good in my opinion) and the olsson block. The um2 fans are good enough in my opnion.
So I guess I need to know your budget.
Yes I like the quieter fan - I don't know the part number for the one UM used to sell with the UM2 the first year but it's very quiet. I'm not sure the voltage of that fan either - did you check the voltage? It's probably 5V but some of the fans are 12V.
I dont want to spent much money, but if bondtech set is worth it, I can buy, but I expect perfect exxtrusion, on all my printers (chinese ender, cr10 and um2) I have problems with extrusion. My colleague told me that is much better than from UM2+, on bondtech he is able to print simple elements 120mm/s. What is your opinion? Did you try it?
I am searching something to improve the cooling of the print due to fact that I have very poor overhangs near the bed (2cm above the bed is much, much better) - I print PLA with 60° on the bed. Did you have similar problems?
I have olsson block, so I dont need upgrade "+".
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2 hours ago, tinkergnome said:
Looks like "combing" moves. Check the combing settings (section "Travel").
Set combing mode to "not in skin" or switch it off.
And check the travel moves in the Cura preview, moves with retraction are light blue. No need to waste material.
Thank you! it helped.
Now I would like to know if those modification will be good for my UM2, or maybe you have other proposals what to change or something additional:
1. Fan bracket change for the same as in UM2+ - it will work? I recognized poor cooling.
2. New fans for cooling print - the same as in stock UM2? after 1,6k hours i think that it will be good to replace both of them what do you think? Maybe you know better fans in this size?
3. New fan for hotend - replacemant for Sunon (stock is very, very noisy, massacre):
4. Last modification - bondtech extruder - maybe next month (expensive modification). With new motor from UM2+ (complete set from Bondtech).
5. Touchscreen for Raspberry PI (now I have only rasp PI without touchscreen. I found it here: https://www.thingiverse.com/thing:2207689.
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4 minutes ago, gr5 said:
Retraction (if enabled) doesn't work so well on the bottom layer because ideally you want to over-squish the bottom layer (so the part sticks well). Which means there is always extra material leaking out. The bigger question is if you print two columns how badly does it string from one column to the other.
The same print on Ender 3 pro - retraction normally. Here I have the line which looks very bad. The same on the top layers, no retraction at all in few places. What should I change to enable retraction similar to Ender? I was trying to find all settings connected with retraction but now I have no idea how to solve it.
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Hello again,
I made many tests and trials on different material and I came to conlsuion that those defects which I had are coming from bad material, please look at below photos - what you you think? Everything is OK or you see some defects? Prints are very similar to my Ender 3 pro.
I have other issue - I can not understand why machine dont retract always. Sometimes I see when distances are very long, but now always - it is coming from settting from cura - can you support me what should i change?
My settings:
retraction distance 5mm
retraction speed 45mm/s
retraction at layer change - OFF
retraction minimum travel 0,8mm
retraction extra prime amount 0
maximum retraction count 100
max comb distance with no retract 30.
Attached photo with the problem on raspberry pi casing print - arrow places where should be retracted and machine does not do this. This wole line should be retracted! I dont know why machine is not doing this (and even not trying -I will hear jumping of the stepper). My ender is retracting this normally.
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Thank you, I am from Poland, so I will need to find it locally. I will make a post in few days what I tried and results.
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8 hours ago, gr5 said:
The "plus" kit from Ultimaker of course is awesome. Upgrades your UM2 to a UM2+. But it is something like 400 euros. There is a chinese version much cheaper but I have no idea if it actually works or has serious flaws.
Yes I know, but I need only step motor to extruder from UM2+. Do you know where I can buy it? I found only motors to standard UM2, not +. Or maybe you know what is the specification of this motor? I am thinking if should I combine stepper motor from 2+ with bondtech or trianglelab, but probably I will choose cheaper trianglelab.
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Hello,
I already replace this teflon part and I have olsson block. After cleaning is quite better, but I would like to replace the extruder. Do I need to buy motor from 2+? Or standard from UM2 is enough?
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Hello,
I have Ultimaker 2 (standard, without "+") and I have big problems with extrusion with not standard material or with fast speed. I would like to make upgrade to Bondtech or trianglelab extruder. Please let me know if Bondtech is worth to pay 4x more than trianglelab? Or triangle lab is good enough? I would like to also know if I need to buy new stepper motor to extruder (from 2+) or stock from UM2 will be enough? I can not find anywhere this stepper to buy. Please let me know how to proceed with that. By the way upgrade kit official from Ultimaker is not good enough for my needs.
My second problem: very noise fan which is cooling heatblock - how and on what can I replace it?
Thanks in advance for your support.
Best regards.
Remy
Ultimaker 2 Extruder problems - needed upgrade
in UltiMaker 3D printers
Posted
GR5 - thank you for your detailed repsonse! It will help me and other people for sure.
I already received bondtech - print quality is now awesome! I am only disappointed (maybe I shouldnt) that I can not print 80mm/s on 0,4nozzle and 0,3 layer height - some under extrusion still visible on temp 220°C (PLA Colorfill). It is normal or should I trying to find the issue?
When I was connecting the feeder I saw that my motherboard is brown in few places, I think its from step sticks, it is normal? Below photo.