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Anycubic i3 Mega Hotend Overhaul

by _Icarus May 26, 2019
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Thanks for your work!
How can I set a negative offset in Cura? In the printer settings it is not possible to insert a negative value, but in the 'Thing Details' you described, that I have to add an origin offset of x=-2.6 and y=-3.
Currently I am using Cura 4.1.
Thanks in advance!

Hey! I'm glad you appreciate it!

You don't really need the origin offset to be able to use my modification, but it will prevent your parts from being slightly off-center by a few millimeters whenever you're printing and allow you not to lose a few millimeters on the XY build plane.

I looked into Cura, specifically version 4.1.0, and found that it is, in fact, impossible to enter a negative value into the Nozzle offset X and Nozzle offset Y fields. I did some research and apparently, that is a broken feature in version 4.1.x. I kept digging around and it looks like this will be fixed in version 4.2. I don't use Cura, so I don't have it configured for my Anycubic and couldn't tell you if the feature actually works at the moment, but I can confirm that I am able to enter negative numbers in the 4.2 beta build of Cura. You can get the beta build here.

I'll update my instructions to reflect knowledge of this issue.

Hopefully, it works; they do know of this bug and seem to have fixed it. Let me know how it goes!

I tried the 4.2 Beta like you said. It works perfectly!! :))
Thank you very much!

That's great to hear!
Happy printing!

Nice work!
Can you add a version for the Sunon 5015 part cooler fan?
Further cooling ducts from two sides or round version would be great :)
The heatend fan is 40x40mm?

Thank you.

Unfortunately, I do not have a Sunon 5015 fan that I can take accurate measurements from or use for QA. That would also require redesigning the cooling duct connection point which I wouldn't be comfortable doing without the physical fan.

When I get around to making different cooling ducts for the stock fan, I'll definitely be posting them here. Until then, you can feel free to remix this to make your own cooling ducts. I designed the part fan mount and cooling duct to be modular so they're easy to replace and redesign without modification to the rest of the design to accommodate them.

And yes, the hotend / heatsink fan is a 40mm fan, as mentioned in the build notes. I am specifically using a Kaze Scythe Mini instead of the stock 40mm fan that comes with the i3 Mega if that helps in any way. Both should fit the same because they're both 40mm fans and the Kaze fit on other hotend builds I had from other designers that used a 40mm fan there.