RudydG
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Posts posted by RudydG
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I've done this to solve this issue. Pages 7 and 8 covers most of this problem.
Thanks.
I have read this 10 times but I have not come clear with that.
But now it works and after 16 calibration (calibration.v03) it "works"
After that I add "Mark2 for Ultimaker2" in cura.
Know i want to print my first "easy dual project" and it fails...
1. Download this: https://www.thingiverse.com/thing:21773
2. Load both files for extruder 1 and 2
3. Make settings for extruder 1 and 2
4. Merge both models
5. Save the file to de SD card
6. Try to print --> fail
- The extruder 2 touched the buildplate at the first extrusion.
- When extruder 1 starts to print, the builtplate ist to high and extruder 1 scratched the buildplate.
- After i try to print the calibration.v03 again and everything works fine.
What did I forget to set? (Its the first time i used cura 2.5).
Or maybe i miss something with the start code?
How much is your z-offset?
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Hello everybody
I have a few problems and questions.
Last week I exchanged the old print head from my UM2 (with Bondtech Feeder Universal (right) and Tinkergnome V16.03.1) with the new UM2+ upgrade kit print head. Afterwards I printed to test, if everything still works the Benchy boat and it was all right.
Yesterday I changed everything to Mark2: add Bondtech Feeder Universal LeftHand, old printed head, Mark2 board and Tinker-Mark2-expansion-board-17.02.2.hex.
1. Is the firmware “Tinker-Mark2-expansion-board-17.02.2.hex” correct or do I need to take the “Tinker-Mark2-dual-17.02.2.hex”?
2. The Feeder of Extruder 1 has been rotating backwards since the new firmware “Tinker-Mark2-expansion-board-17.02.2.hex”. The Feeder of Extruder 2 runs normally. How can I fix this?
3. What kind of glue (brand and type) do you use? For me, the magnets do not hold with my UHU plastic glue. At each toolchange, the magnets drop off.
4. Is this distance of 2.1mm ok? I thought with the old UM2 print head it was 1mm.
5. Am I right that I can adjust the 5.1mm in the menu "Adjust Z (nozzle 2)" and then the printer knows how high the plate must go after the tool change when printing?
Thanks for your feedback
Just to let you know, in my case, it was about 5mms, and i had to change the position of the second head, i printed a plstic shim to reduce the gap to 2mms
With the 5mms my z axe went crazy during the head change or pick-up.
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To summarize, it seems that the leaning problem is due to rounding errors because of the printhead 2 offset settings, when those X/Y values are not multiples of a microstep (0.0125)
Am I correct ?
I guess you are right, (the values i don't know, because we don't have control over the 3rd decimal figure)
But i checked some old prints is still had, and i had it on all of my prints, from the beginning i used the MK2, but is thought it was bad calibration.
Will follow this thread from distance, as i leave for a week on holiday ;-)
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Can you post your extruder ofeset settings?
Seems to be the same situation, let's hope this is true, so the solution could be simple, choose a round value, like 18.10 instead of 18.11 or 18.09
Maybe some others can test this also?
I am printing dual at this moment, without problems / leaning / skewing ;-)
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My extruder offsets:
X 17.87
Y - 24.35
Z 2.45
And I had leaning based on Cura 2.6 and no leaning based on Cura 2.5 with these same offsets....
I have 2 gcode files, which had the leaning problem before i changed my offsets to a round value, after that, the 2 files, without changing anything else, printed straight.
Maybe i am lucky, but to me it seems there is an "connection" between the offset and the leaning.
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My contribution....
Slicer S3D
Can you post your extruder ofeset settings?
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Tested today:
Redid the calibration, and put new values in the offset, still round figures.
printing right now my own file which was skewed.
All is printing fine now, straight!!
So, at least for now, the printer works like it is supposed to.
Can someone do the same things?
Or people which have skewed prints, what are you extruder offset settings?
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Update,
I changed the extruder offset values to 18.90 and -23.60
Print is perfectly straight now.
If someone else could do the same test,we could narrow down the possibilities.
About the extruder offset, if you calibrate trough the normal procedure, 1 step is 0.4mm. If my theory is correct, it could be solved by setting the offset to a round value before doing a calibration. (and the influence would be invisible)
Will try a new calibration tonight, being sure that i have a round figure as result. and then a redo of this print.
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And another update:
Cura 2.5
-Sliced for 2 extruders
-print with the 2 heads
-started print
-object skewed to the rear (straight in the L-R direction)-exactly the same as with only 1 head.
I can assure now, it is not a mechanical thing.
I had it with S3D, Cura 2.5
Will try now, with other offset settings, see if things change. WIll ignore the calibration right now and set the values to a round setting. (i have a feeling it has something to do with this)
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Cura 2.5
-Sliced for 2 extruders
-removed head 2
-started print
-obeject skewed to the rear (straight in the L-R direction)
Redo now with same Gcode, and second head in the machine + filament
Wait and see in the morning.
Already sure it is not a mechanical thing, otherwise it would not be skewed to the rear with the second head outside of the printer.
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I checked the pulleys and they were all really tight.
Could you guys try to replicate the problem we see by printing this cura project ?
https://1drv.ms/u/s!AgmRtaUlyi-AkZhYSI2hRGizd3o3Cw
You don't have to put materials in the second printhead and you can even put it out of the printer. Just be sure that you tape it so it doesn't burn shit.
Should take around 1h45min to print.
If you can replicate the problem, then we know it's something widespread.
printing right now!
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Maybe something to compare?
My2nd extruder Offsets:
X 18.93
Y -23.61
Z 2.06
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My thoughts;
-my pulleys+belts are rock steady, no doubt about that.
-if it was a mechanical problem (hitting the 2nd head agaist the holder, then it would dissapear once it has shifted a couple of thents.
And it is so regular, that i really doubt it would not be software.
My 2nd head is at the the right side, like in the building explanation.
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This is a copy/paste of the conversation going on in the beta-tester forum of the Mark2.
We are moving the discussion here
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Houston, I think we have a problem
I made a very simple model to test the "leaning to the left" behavior.
Test 1:
Single extrusion
Good print, it stays perfectly aligned.
Test 2:
Dual extrusion
It's fucked.
Here, we can see that somewhere in the first quarter of the print, it failed to pick the second print extruder.
I simply put the second print head away from the printer, so there was no interaction between magnets : it doesn't change anything. Magnets are not responsible for what we observe
Comparison between test 1 (left) and test 2.
Something is wrong, do you guys have ideas ?
Could you please try to replicate this problem ?
Here is the project file, Cura 2.6: https://1drv.ms/u/s!AgmRtaUlyi-AkZhYSI2hRGizd3o3Cw
I had it now with several different prints, and different slicers (Cura 2.5 an S3D)
In my case, it is skewed to the right, and to the back.
Would it be some kind of rounding factor in the firmware, related to the calibration? And a kind of zero with the toolchange?
I believe i have it from the beginning, but until now, i had not noticed it, printing abstract things where it was not noticable, and i knew there was something wrong, just could not detect it. Thought is was a wrong calibration.
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Same piece printed with Cura,no skewing, perfectly straight.
Must be in the combination of S3D and the M2 firmware?
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You talk about the skew or the psu?
Sorry, I was talking about the skew to the left.
Ok, then i have good hope it gets solved ;-)
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Exactly the same problem here.
I already reported this issue in the dev forum.
Don't worry, we'll fix this !
You talk about the skew or the psu?
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I have a strange problem.
With dual extrusion, PVA + PLA, my prints gets skewed in the X direction. both heads.
Checked all the belts + pulleys.
In single extrusion everything is 100% ok.
Anyone?
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Ok, first of all, I have tested the latest profile only with PLA/PLA so you will must adjust the parameters, maybe you can take a look from the cura settings for PLA/PVA or other.
I have some note about the new profile [Mark2_2.3.3], for you @RudyG and the other users.
- The profile allowes different settings per QUALITY profile, except the PRIMARY EXTRUDER in layer-addition-infill-support tabs that are menaged by the extruders selection [First-Second-Both]
- The temperatures and the fan speed are managed by the materials selection as classic.
- In Gcode tab, you must check yours build volume. Also, you MUST NOT CHANGE the toolhead offset for T0 [First head] or T1 [second Head]. The offset must be [00,00] for all tools.
- Now is the turn of the Scripts tab. Depending on the extruder selected [First-Second or Both] S3D loads different script in "Starting", "Tool Change" and "Ending". This allows to use this profile with single prints.
- Starting script. At the moment it is the same that there is in Cura. Except some additional retractions. The 4.50mm retraction help me to get a clean tool change with minimum oozing. If you change this retraction in "Advanced" tab, you must change also in "Starting scripts". You can also set to zero if you don't need it.
The retractions are:
T1 ; swap to the 2nd head
[...]
G1 E35 F150 ; purge slowly
G92 E0 ; zero extruded length
G1 E-4.5 F1500 ; retract <-- S3D'S TOOL CHANGE RETRACTION SETTING
G92 E0 ; zero extruder
G1 E-16 F1200 ; tool retract <-- PRINTER'S TOOL CHANGE RETRACTION SETTING
G92 E0 ; zero extruder
G1 X120 Z0 F5000 ; move away from the prime poop
[...]
T0 ; swap to the 1st head
In my case the tool change retraction lenght is 4.50mm@25mm/s +16mm@20mm/s. I don't need extra prime, but I am not safe from some oozing.
- Tool Change Script. The script is almost definitive. It contains the idle temperatures for inactive extruder and the heat up for the new extruder. This script is menaged by the extruder selection and not by material selection so you must change idle and initial heatup temperatures depending the material. It is also possible to manage these temperatures by material selection but in single prints the inactive head remains hot. I will work on it.
- The ending script is the same as Cura
The additional commands in post processing are made from neotko https://ultimaker.com/en/community/7450-simplify3d?page=10#reply-160373.
It would be a good thing try to set a lower acceleration/jerk when the second head is coupled. But at the moment I don't have time to study it.
To concluding, you have to ADAPT some settings to yours printers, these settings works good for mine I don't know with yours.
The 2.3.3 is not the definitive one, there are still steps to check and possibly modify.
I would just like to point out that this profile is an alternative and NOT a substitute to Cura.
https://www.dropbox.com/s/i4czkxj7qw5qxlp/Mark2_2.3.3.fff?dl=0
Thanks Marco,
Will try this!!!
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@RudydG can you share you latest S3D profile, I like to give it try...
I am working on a S3D profile too, I'm focusing on tool change script with idle temperature and a soft acceleration/jerk control.
The latest script is good but not yet perfect.
My current version works good. There was some ooze issues after the printer reads T0/T1 beacuse it unretract immediately the new extruder.
With regard to the expected time and the real one, the maximum incongruity was +8 minutes.
If anyone will try it, let me know if there will be some problems.
https://www.dropbox.com/s/g3bs5chtbjl1qlk/Mark2_1.1.5.fff?dl=0
Marco,
First, i did not have time to test the 1.1.5 version.
Regarding S3D and speeds / accelerations for the second head.
Did you get this to work? I see additional command in the lower script portion in S3D?
This is about the only problem i still have, getting the setiings good for my second head with different material (Ultimaker Pva)
Have a newer version to test?
Many thanks,
Rudy
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The Ultimaker pva is sticky, even after some hours in the water. But it also sticks well to the parts during printing.
I also used other makerfille pva, easier tot remove, but it was more difficult to print due to less adhesion to pla.
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I use pc-max with UM pva, and use the Simplify 3D pla + pva fine profile.
Only change the dense layer to 2, 90 % dense infill and 0 upper and lower seperation layers, also 0 horizontal offset.
Works nicely.
My printbed is treated with 3Dlac, and to get good adhesive on top of the pc-max, i make the support as big as i can, or have to.
If i use the PolySupport, i threat it like normal support, no dense layer and a little horizontal offset.
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hmmm... Considering they're only N42 (as the page says and not N52), they're pretty impressive for their holding power.
Anyways, yes I ensured that the poles are opposite. I even ensured that the magnet pairs touch each other completely while making sure there's the "air gap" between the head and the coupler.
What i meant here, was are the pairs all in the same direction?
That they are all pairs is ofcourse a basic, but if they where not, you couldn't even pick the head up ;-)
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hmmm... Considering they're only N42 (as the page says and not N52), they're pretty impressive for their holding power.
Anyways, yes I ensured that the poles are opposite. I even ensured that the magnet pairs touch each other completely while making sure there's the "air gap" between the head and the coupler.
I did do a dry run with the bowden only and without the filament yet. But with the combined bowden+filament, it has become more stiff. I bought a replacement bowden that I've been using on my UMO and has not failed me so far. They're less transparent than what Ultimaker supplies but they're more slippery and less stiff. The tube comes 5ft long so I'll cut the tube slightly longer than stock so it will bend easier.
Well, maybe the stiffer bowden, (i use the original brand new bowden), combined with the direction of the bend which the filament has can cause your situation.
I am pretty sure, that, unless your magnets are to weak, it must be a to stiff bowden "combination"
Ultimaker Mark2 - The Smart Dual-Extrusion Upgrade
in Third party products & modifications
Posted · Edited by Guest
It is exactly the same problem i had. Exactly!!
Get your 2nd head higher, closer to the first, and all these problems will be gone.
Just try, hang your 2nd head out of the printer, reduce your z offset to 1 mm, and simulate your trafiek cone startup. You will see the printer acting normal.