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Gudo agreed on sharing this early beta designs. As soon I get more time I'll upload the um2hotend Beta (NO INSTRUCTIONS FOR NOW) if someone is brave enough to use the ZGE with Mark 2. It uses a 4dia 3mm depth magnets and it uses 31 for a full 2 head setup. So, isn't assembly friendly but the design really rocks.

So, for now just photos.

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Oh also UM3 Core version for um2 zgemark2, Gudo is testing it just now the first designs.

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It will only need 2 fans for the print cooling but each head will have his 5v fan. The fans are very easy to assemble or remove and every part is modular. The clip system uses a 'spring-magnet' system, that so far looks amazing but need's testing. Also the print precision will be really crucial on the clip system.

Also Gudo moved the bed, by changing the screw points, this gives a 1cm area for the hotends to rest, so they don't need to rampup/rampdown while park/unpark. Also the magnet clip system allows for smooth removal to avoid any misstep lost or shift on movement forces.

I'll share more when I know more :D I have printed a full version but my reseller doesn't have um2 3 aluminium parts in stock so I'm waiting for other source arrival to start assembling it.

@Gudo will post more about this soon.

Also since the files are on my dropbox, if anyone wants to beta test, PM me with your email so I give you read access.

Edit. At the moment I can’t test this, I have all printed, but my agenda is getting fill of stuff to test and work.

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Hi to all !

Thank you neotko for the introduction, also thanks for the support and help of the entire Mark2 team, sorry for not mention all the names, you will easily recognize.

As you can see, the goal was to adapt the ZGE DD extruder to the Mark2 magnetic tool change, for reasons of room in order to install a Dual ZGE, it was necessary to review and modify the Mark2 magnetic tool change system , print heads and routing while respecting as closely as possible the the Original Mark2 operations.

It was necessary to install a second docking holder mirrored with the front right docking at the printer's left front, which necessitated modifying the magnetic tool change routing while retaining the possibility of exploiting the Mark2 firmware in almost its totality. This firmware tool change modification was realized, as usual with great success by Tinkergnome that I will never thank enough!

In order for the ZGE use, to retain the print head and to ensure a very sure clamping of it , a magnetic locking/unlocking lever system has been set up, the lever exploits the magnets force more as springs to stay mechanicaly in locking position, it’s impossible to remove the head without turning by hand or by the unlocker docking key the head locking lever, so the magnetic tool change, while staying very smooth, needs much less force to dock/undock with no risk of motor micro misstepping issues or anything else.

Also the fact of being able to dock the 2 heads, it has been logical to provide to that a single common cooling unit which stays attached to the gantry.

This has given some advantages such as, less loss of print aera and the same weight is always supported by the gantry, a same print speed could be set if the materials are identical to the 2 print heads…,

Print head Offset at less 0.5 mm tolerance

X : +/- 18mm

Y : +/- 0mm

Z : +/- 0mm

For all the rest the dual mode settings and operations are completely similar to the original Mark2

The result is quite satisfying, the Foehnsturm magnetic tool change really opens very interesting prospects and also for future the use possibilities of tools other than the FDM print head.

Sorry for having not made the system with the wellknown UM2 hot end, as I got 2 UM3cores thanks to neotko ,I was very curious to tested them, contrary to all the uncertainties, I can say that it works wonderfully ! . Anyway any decent hot end could work with the system under condition to make the appropriate hot end holder adaptation.

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Impressive! Well done...now I wish I had an UM2 :p

 

You know...

New short belt pulleys (a-la um2 gt2 single dual pulley)

New Z endstop

New gudo-neotko-beyond slideblocks

Done :D

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Thanks to you all !

@ catohagen

I think Ultimaker should hire Gudo !

Hummm!.... we are always more creative when we have small means and we can think more freely ! ;)

btw, today I tested an anti oozing device, it seems it works great, more long time print tests will confirm.

The device consists on the use of a 0.08mm very flexible metallic strip on which the noozle tip comes to rely at the docking postion, as after docking retractation there is no pressure, the very very light metal contact, less to 2 grs. pressure force on the nozzle tip, is enough to stop the eventual material dripping during the docked head standby, the metallic strip contributes also to cooling down a bit the nozzle tip temp. and its hight flexibility with light contact prevents tip erosion issue.

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Impressive! Well done...now I wish I had an UM2 :p

 

You know...

New short belt pulleys (a-la um2 gt2 single dual pulley)

New Z endstop

New gudo-neotko-beyond slideblocks

Done :D

 

neotko we are a winner team ! :p

and in very soon , the UM XYcore system !

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neotko we are a winner team ! :p

and in very soon , the UM XYcore system !

 

Yeahh! CoreXY UM system upgrade... Now that gonna be a fun ride!

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neotko we are a  winner team  ! :p

and in very soon ,  the UM XYcore system !

 

Yeahh! CoreXY UM system upgrade... Now that gonna be a fun ride!

 

the future to complete the whole UM heavy mod !

May be we will need a serious Main board to manage all this, a Duet3D for sample ?

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the future to complete the whole UM heavy mod !

May be we will need a serious Main board to manage all this, a Duet3D for sample ?

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Looking great !

Duet3D for me, you know, is the next logical step. Specially since um marlin is quite old and most probably doesn’t have the fixes for corexy that have come over time. Also silent steppers, more expansion room. Maybe even a bigger corexy machine?

Anyoyhas ever tried UM Marlin on a corexy setup? I know @foehnsturm did a corexy but used a Smoothieboard until the board had some crosstalk problems?

Maybe @gudo we should make a new post for this? Ofc it’s related since with the corexy setup it could have a easier multitool approach specially since duet3d and other new boards allow to use bigger amps steppers... Maybe reinforce it with aluminum extrusion and make a small and compact multitool tank? Could be so fun

Edited by Guest
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of course neotko ! The subject here is the Mark2 Dual ZGE, it was just an ad effect when the project is more advanced I think it will be necessary to open a post specially for that ;)

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Impressive! Well done...now I wish I had an UM2 :p

 

You know...

New short belt pulleys (a-la um2 gt2 single dual pulley)

New Z endstop

New gudo-neotko-beyond slideblocks

Done :D

 

I already have all of that but the short belt pulleys :)

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neotko we are a  winner team  ! :p

and in very soon ,  the UM XYcore system !

 

Yeahh! CoreXY UM system upgrade... Now that gonna be a fun ride!

 

If only I had more time and a CNC mill...you have sparkled ideas in my brain based on this :p

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@gudo can you add the "core version" files to the dropbox? like to have a look at them ...  very tempted to give it a try.

Hi ultiarjan

Ofc I can! it's really worth to try, it will more reliable than the UM2 hot end

I 'm in updating the design files for improving more some details noticed when testing, just wait a few days, time to complete the folder, included step, bom etc....

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@gudo can you add the "core version" files to the dropbox? like to have a look at them ...  very tempted to give it a try.

Hi ultiarjan

Ofc I can! it's really worth to try, it will more reliable than the UM2 hot end

I 'm in updating the design files for improving more some details noticed when testing, just wait  a few days, time to complete the folder, included step, bom etc....

Great! no hurry,

I was planning on getting a bom together based on the "normal" zge and the m2 version, but if you provide it it will be much more reliable I'm sure.

I've been looking already but can't find a good source for the 4x4mm rods, any supplier tip?

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I've been looking already but can't find a good source for the 4x4mm rods, any supplier tip?

Op 'spiestaal' zoeken, je vind zeker iets in je buurt voor 2 keer niets...

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Hi to all !

Mark2-Dual ZGE more and more tests.....

Cura 15.04.6 vs 2.7 version, with same basic print settings

old Cura 1h28

2.7version 1h49

here the result before post cleaning of the print test done it seems a bit better on the right with Cura 2.7 vs the left sliced with the old 15.04.5 version, better temperature control !

It 's really a shame that Cura did not think to allow the Ironing application to specific layers during the print and not only on the last top layer which in many cases is not necessarily flat, as the sample here, or as thousand of others print models designs !?

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BTW thanks to Lara Steele the author of the dragon design dowloaded from Thingiverse, I just customized the round base.

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Hey Gudo, very nice build!

I also like the way you solved the object cooling fans, I have to copy that :)

Anyone has ever tried UM Marlin on a corexy setup? ...

I did a year ago. Transformed UM2 having corexy inside the frame, while using standard UM2 firmware. I did have some problems with "define Quick_Home". You should not use this option in combination with corexy.

I'm also thinkering on dockable um3 cores. Downside of using ultimainboard, is having only 2 heaters available (+build plate ofc). While using corexy, there should be many more cores inside... ;)

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