RudydG
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Everything posted by RudydG
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I think i will start with the UM pva, just to be sure i have the right stuff. You say keep it dry (in the past i already printed with PVA, without succes on a Leapfrog Creator, and in the end i left the roll in a zipbag, placed it in such a way the filament could be extracted out of the bag without tangling. Other solution i tried was measuring the length i needed + some extra, and unrolling that from the spool. You solution is better ofcourse. But where to find the sillicagel i sufficient volume?
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Update 10 May 2017 My old converted UM2 is now a UM2+ mark 2-I am very happy!!! I printed all my parts in Polymaker Pla, strong and no problems with it, even the wedges are superstrong. I started with the old UM2 head + bowden + old um2 feeder, but soon felt there was room for improvement. (skipping / bowden problems / 2 different settings makes it even complicater) For the wiring, and the control of all the fans, is used the mark2 print + wiring, piece of cake, and best of all, the fans of the second had are "inteligent", when the head is cold, no fan turning, quiet. (firts i had all the fans wirde together, and it was a lot of noise) Then spend the extra 500€ for a second UM2+ extruder upgrade kit, and the complete hardware of the printer is now working nicely, easy settings, stable calibration. Just one issue left, i had 2 prints where the print stopped with the out of print area message. At this moment, and with the info found on the internet, i am trying to avoid this with another sd card, and wiring the second extruder motor thru the ferrite core found in the right side of the printer. At the moment i am printing with polusupport as suport material, but i have the feeling PVA is the way to go. Any tips on good pva? + settings? Many thanks to the community!
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The gcode sliced from cura contains a lot of acceleration/jerk command to get better quality. If you read the gcode you will find a lot of M204/M205 commands. Ok, so i can accept this as a normal thing with the new Cura? Anyway, at this moment, seing how well things work and prints, i will gladly accept this, together with the intelligent temperature control, it amazes me that it can do a dual color print, without prime pillar, without color contamination. So good is just ordered a UM extrusion upgrade kit to get things 100% !!!
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At this moment everything works!! Calibration succesfull. Just some minor issues remain. The 2nd head, old extruder of the UM2 often skips, will have to replace that, together with the old bowden tube and the ollson block. I hoped it would work with the old stuff... Not! Bwaa, the joy of using dual extrusion is so high, that maybe i will buy a second UM2+ upgrade head! I use Cura to slice (since the mark2 package now fully supports this software) What is still strange, my acceleration and jerk settings, 3000mm/s and 20mm in the firmware, are the same settings in Cura (advanced mode), but when i print, as soon as the print starts, it goes to 250mm/s and 6 or 7mm. Is there some preset or setting i miss? Many thanks!!
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With 1/4 the price of the machine, this one's definitely cheaper! I have the BOM posted on the project site so anyone can source out the individual components. Just some basic soldering will do. Besides, there's always a first time for everything! Btw, I went ahead and started a topic dedicated to the project. https://ultimaker.com/en/community/49187-diy-polishing-station I found your BOM, and all the links. But, being in Europe, it is not so simple, we need to add a lot of shipping costs (not from banggood, usualy free shipping, but from amazon, they are expensive in shipping) Still some work to do before i have a correct price ;-)
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Found the solution!! Works with 2 nozzle 2mm apart from each other, 5mm was to much. (height) Now the bed levelling works fine (although for the second head i also used the card;-) Busy with calibrating now. See that the old feeder of the UM2 really ... is bad. lots of skipping. Will replace that + new ollson block. I am happy!! Many thanks already for the beatiful project!
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I think i found the solution: When reducing the difference between the 2 nozzles to 2mm, (i did a "dry run"), the behaviour is normal, the Z does not go down at the start, and the printheight seems ok. Now printing a new spacer
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Printer free, time to test again. Still trouble while starting the print, the moment the head starts to move to pick up T1 (second head), i have a negative Z , it bottoms out and start skipping. As i also have this problem with wrong bed height, i think it is related! We are sure about the calibration, first the usual like a standard UM2+, the pickup T1, and do the Z with this extruder? What are you peoples settings? difference between my 2 heads are no 5mm (T1 second head is lower (closer to the printbed) my extruder offest are 18.09, -23,99 and Z 4.84 Very strange that the Z axe goes down at the beginning...
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Great project!! Is on my list, wanted to buy the (expensive) machine, but after seeing this, i will calculate the cost, and evaluate then ;-)
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The tool change travel moves are done by the firmware, but not faster than 200mm/s. If your printer can not handle this, then there is definitely something wrong with it... Are you sure, that the print head (or the rods) does not collide with .... whatever...? And yes: if you reduce the max. x/y speed of the printer settings, the Marlin firmware limits all moves to this speed (at least it's worth a try). I checked, and did not find any collision source, or bad things in my printer. But movement above 100mm/sec i never did. I just do not see any real advantage of these high speeds, besides more wear on the machine, the time gain will be relatively low. I tried changing the speeds in the fw, but i had the feeling, that the head changing speed was not altered. Normaly this machine is free again sunday at 9pm, will test it further then.
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I have decided I like you a lot. LOL Considering you're doing this for free for the community and its got huge impact, this is the least I can do to show appreciation. I am in!!! Where is the button??
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There are no special differences. S3D does not (yet) generate the "temperature magic" like Cura, but besides that it's the same. Leave the tool change script empty (the firmware takes care of it) and copy the start/end-gcode from Cura (more or less). I rarely use S3D for dual printing, the following is untested, just to give the idea: ;startM84G21 ;metric valuesG90 ;absolute positioningM82 ;set extruder to absolute modeM107 ;start with the fan offM200 D0 T0 ;reset filament diameterM200 D0 T1G28 ; home allM190 S[bed0_temperature]M109 S[extruder1_temperature] T1M104 S[extruder0_temperature] T0T1 ; move to the 2th headG0 X140 Y30 F9000 ; move to prime positionG0 Z20 F2400 ;move the platform to 20mmG92 E0 ; zero the extruder lengthG1 E35 F225 ;purge nozzle quicklyG92 E0 ;zero the extruded length againG1 E-4.5 F1500 ; retractG1 X120 Z0.01 F5000 ; move away from the prime poopG1 X90 F9000 ; move away from the prime poopG0 Z20 F2400 ;move the platform to 20 mmT0 ; move to the first headG0 X120 Y30 F9000; move to prime positionG92 E0G1 E35 F225 ;purge nozzle quicklyG92 E0G1 E-4.5 F1500G1 X100 Z0.01 F5000 ; move away from the prime poopG1 X70 F9000 ; move away from the prime poopG0 Z10 F2400 ;move the platform to 10 mm;endG90 ;absolute positioningM104 S0 T0 ;extruder heater offM104 S0 T1M140 S0 ;turn off bedT0 ; move to the first headG28 ; home allM84 ;steppers offM107 ; fan off Txs, will try this out, once my printer is free again ;-) And good to know the head-change is a firmware thing, meaning we can do all the normal things in the Gcode (maybe not the speed that the headchange is done?)
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Also, how's the condition of the belts? And are they tight enough? Belts are new, changed at 6000Hrs, tensioners also renewed.
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Yep, correct, didn't look there.. prior the mark 2 was between the other UM's.
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Will there be support for S3D? I use this 99% of the time. If we have the startup / en and toolchange script / gcode we could start trying ;-) Ofcourse i will help with this testing and tuning ;-)
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Working better and better!! 2 issues left: 1, how can i reduce the speed of first move of head 1, before picking up head 2, because my belts jump over.... 2: what is the exact Z calibration? i tried: leveling buildplate a usual, with the ulticard, followed bij the Z adjust of the 2nd extruder, but my plate seems to be to high in that config. There's a preferences -> motion settings menu in the firmware. You can try to reduce axis max speed / accel / jerk there. Did all that, but when i print from cura, these settings are overruled. (because there is a startup gcode in cura,) Anyway, i tried deleting and installing Cura again on my Mac, and now i can't get the printers right again, after doing all the cura config files copy, there is no mark 2 printer available in Cura.... I think i will stop this project for a couple of days, i get some important tasks to print. Therefore i need this printer + simplify3D.
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Rudy, here's 2 options to gain the extra mm's. Please share with us if you have any issues with it; https://www.youmagine.com/designs/5mm-lower-head-for-the-mark2-dual-extrusion-for-ultimaker2-system edit: and should you need anything else than 5mm you can easily print the spacer in any height by adjusting the height in your slicer. Supersolution!!!! Txs
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Working better and better!! 2 issues left: 1, how can i reduce the speed of first move of head 1, before picking up head 2, because my belts jump over.... 2: what is the exact Z calibration? i tried: leveling buildplate a usual, with the ulticard, followed bij the Z adjust of the 2nd extruder, but my plate seems to be to high in that config.
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Hey Ultiarjan, can i get them also? Some minor things still happening, if i have the correct files....i can rule that point out.
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Ok, just found it!! the Gcode was wrong. This is the startcode i guess??
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You mean you cannot add the printer? Scripts: Contents / Resources / plugins / plugins / PostprocessingPlugin / scripts Solved !! Txs
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Did a factory reset, followed by a new calibration, problem still exists. The wipe position is to much to the lower Y (front of the machine) I can change whatever i like enable wipe, change positions, nothing helps. Maybe some error in the FW?
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You mean you cannot add the printer? Scripts: Contents / Resources / plugins / plugins / PostprocessingPlugin / scripts At this moment, i re-installed Cura, and put alle the config files under the osx directory, it seems to work!! Now i have a funny behavior. i do all the hardware calibrations, docking as it should, en done about 20 manual changes, perfectly, smooth and correct!! Then, i slice an object with support, for which i chose the second extruder. When i print this file next thing happens: On startup, after reaching the temps, the first heads comes to pick up the second, and the goes to the middle, and comes to the front, against the front chassis. lot on noise and you can see the belts skipping. I disabled the wipe movement.
