A different multi-extrusion approach - UM tool / printhead changer

[neotko 1,417]

sounds good,

difference for UMO and UM2 because of the middle fan indeed, and the whole printhead including the fans are in the upgrade, but not for the UMO, that is one fan on the left. This one could be permanent on the central head and not on the parked ones in the corner.

 

And on umo you also don't get the aluminum plate that holds the peek. I think making this for umo could be a Major pain in the... Just because the weight and the small print area left.

I did a. Umo magnetic head changer and I had to make aluminum laser cut parts. But also Macua (can't remember the nick right) did it without the aluminum plate adding a small fan to keep the peek/plastic printed parts cool.

[ultiarjan 1,223]

sounds good,

difference for UMO and UM2 because of the middle fan indeed, and the whole printhead including the fans are in the upgrade, but not for the UMO, that is one fan on the left. This one could be permanent on the central head and not on the parked ones in the corner.

 

I think it would make much more sense to upgrade the UMO to an UM2 head first if you want to make a magnetic changer setup.

[peggyb 169]

yes, that would be smart, but will be very expensive: new board €357, 2 times um2 upgrade €955... it is easier to buy a um3 then..

umo+ will have the same problem with the size of the printhead..

more fun to adapt the umo dual upgrade I have already, this means only adding magnets, fan and something clever to put it all together..

[neotko 1,417]

Umo/umo-+ also would have more problems. The shafts on um2 are different height (the thin x/y). That's why I designed the Beyond Slideblocks to use the longer um2 shafts and get the central x/y as on um2. Is a tiny difference that makes a world for the head changer since it leaves more room for the lateral move and clip.

[neotko 1,417]

yes, that would be smart, but will be very expensive: new board €357, 2 times um2 upgrade €955... it is easier to buy a um3 then..

umo+ will have the same problem with the size of the printhead..

more fun to adapt the umo dual upgrade I have already, this means only adding magnets, fan and something clever to put it all together..

 

Well um3 is 3k. Umo is 800 umo+ 1000€. The upgrade kit is 400 (all without vat). So... there's a leap of money there. For 800-900€ you could mod a umo/umo+ to print like a um2+ with magnetic changer. You save a full 1k euros..

[EECKHOUT 10]

I have a stupid question to those who designed this upgrade : what about the electronic plate of the Ultimaker 2+? Is it foreseen already to support a second head, both with XY, fan etc and a second extruder? Can we have some details about this subject?

[mastory 44]

Please accept my apologies. Deleted comment reflected old information. See the video below instead.

Edited November 28, 2016 by Guest
Factual correction

[foehnsturm 969]

I have a stupid question to those who designed this upgrade : what about the electronic plate of the Ultimaker 2+? Is it foreseen already to support a second head, both with XY, fan etc and a second extruder? Can we have some details about this subject?

 

Up to now, Ultimaker might change this in the future, the UM2(+) electronics already  feature the required  5th stepper driver, 3rd temp sensor input and heater output.  Only the fans (printhead, part cooling) have to be connected in parallel.

Single extrusion remains unchanged, for dual extrusion the additional head will be picked up and parked again every layer. This is all handled by firmware.

Edited November 27, 2016 by Guest

[conny_g 251]

I have a stupid question to those who designed this upgrade : what about the electronic plate of the Ultimaker 2+? Is it foreseen already to support a second head, both with XY, fan etc and a second extruder? Can we have some details about this subject?

 

Here's a random pic of the Ultimaker 2 Mainboard from some Alibaba seller:

https://sc01.alicdn.com/kf/HTB1NfSoFVXXXXXvXVXXq6xXFXXX0/220554104/HTB1NfSoFVXXXXXvXVXXq6xXFXXX0.jpg

On the right you see "extruder 2", "thermal head 2" and on the left "temp measure 2", that's the temp sensor, head heating and the extruder motor output for the 2nd extruder.

[foehnsturm 969]

Maybe a short video is worth a thousand words.

https://www.youtube.com/watch?v=https://youtu.be/viX_WLRqxYM

Edited November 27, 2016 by Guest

[EECKHOUT 10]

Maybe a short video is worth a thousand words.

 

Thank you for all the informations and the picture of the electronic plate. This is incredible, this video shows well the move of the bed when the head is loaded and pushed back in the corner. Thank you for all this details, I become nervous now and I want to learn to program some pieces in cura now. Where can I find the supplemental pieces to print (head supports, park arm, dual spools support etc...)? As a newbie, I think I will have to make several pieces to get one perfect and it will take some time. Or perheaps I should wait a little more and get all the instructions. Be sure I'll do my best to get it work.

[conny_g 251]

Maybe a short video is worth a thousand words.

https://www.youtube.com/watch?v=https://youtu.be/viX_WLRqxYM

 

Yes, very good. So the new version does not even put the first head back, just picks up the second hanging lower. That's ingeniously simple!

(Just noted that you are from Munich. I live in Regensburg and am working mostly in Munich.)

[LePaul 321]

Great video! So what's the usable print volume (L x W x H) with this setup?

[greengecko 8]

hi

that is also new to me that the 2nd nozzle is just picked up.

here comes the question: how did you solve the oozing problem? by fan and cooling?

is the second print head lower?

your prints are great so there must be a trick.

[foehnsturm 969]

Again, a picture ...

Single extrusion build volume remains like before.

Edited November 28, 2016 by Guest

[foehnsturm 969]

(Just noted that you are from Munich. I live in Regensburg and am working mostly in Munich.)

 

Kurze Nachricht am Tag vorher und Du kannst gerne mal vorbei schauen.

Edited November 28, 2016 by Guest

[foehnsturm 969]

hi

that is also new to me that the 2nd nozzle is just picked up.

here comes the question: how did you solve the oozing problem? by fan and cooling?

is the second print head lower?

your prints are great so there must be a trick.

z-offset, temp management like UM3 and a wiping device

[EECKHOUT 10]

any news about the testers? so calm these days.

[foehnsturm 969]

Well, during the week most of them seem to be quite busy with their daytime work. I expect the first finished upgrades this weekend.

[conny_g 251]

Well, during the week most of them seem to be quite busy with their daytime work. I expect the first finished upgrades this weekend.

 

Yes, exactly. And waiting for the rest of the deliveries of cables, plugs, crimps, screws.

[EECKHOUT 10]

 

Well, during the week most of them seem to be quite busy with their daytime work. I expect the first finished upgrades this weekend.

 

Yes, exactly. And waiting for the rest of the deliveries of cables, plugs, crimps, screws.

 

I've the magnets and the upgrade kit for ulimaker 2 to 2+. Isn't it enough? Should we get more cables, plugs, crimps, screws?

Edited December 1, 2016 by Guest

[EECKHOUT 10]

No news? houlàlà, I saw a print made by conny_G, is that some results?

[krys 206]

Hi @foehnsturm,

Two questions about the magnets:

In Canada it is harder to find exact metric sizes for magnets (or anything else it seems! :() than imperial/American/standard/whatever. My math says 1/4 inch is 6.35mm and 1/8 inch is 3.175mm. Would 6.35mm x 3.175mm magnets fit your design? Are they close enough for tolerances, etc.? ... Or should I actually push for precise metric dimensions.

Also, how important is the quality of the magnets. Your link, for example says N45. Would N35 be okay or too weak maybe? Would N48 be okay or too strong maybe?

I don't know magnets or your tolerances, so I am just trying to figure out strict I need to be with the specs.

Anyway, thanks very much!

[foehnsturm 969]

Hi guys,

Yeah, the conny_G print is one of the first he made with the tool changer. Doesn't look that bad

I expect some more people to finish the upgrade print the first parts until next week. One of the first results of beta testing was to design a second variant for the dock. The maufacturing tolerances of the UM2 frame (maybe caused by different production lots over the years) are probably too high for a safe click-on mounting.

Imperial sized magnets would work as long as their holding force is in the range of 900 gr. But we would have to modiy the couplings to accomodate the larger diameter. The small difference in height shouldn't be an issue.

[SyntaxTerror 344]

In Canada it is harder to find exact metric sizes for magnets (or anything else it seems! :() than imperial/American/standard/whatever.  My math says 1/4 inch is 6.35mm and 1/8 inch is 3.175mm.  Would 6.35mm x 3.175mm magnets fit your design?  Are they close enough for tolerances, etc.?  ... Or should I actually push for precise metric dimensions.

 

Minimum orders being what they are, I have overflow. If you want, I could send you a set?