Direct drive / EZStruder with small nozzle diameters

[mhackney]

The bore length mod, see the posts above.

[Eaglezsoar]

The ezStruder works better with a planetary geared stepper motor. The OEM motor barely has enough torque to work reliably with a .35 or .4 nozzle.

Can you show us how you mounted a geared motor to an ezstruder?

Eagle see this new post I made about this http://forum.seemecnc.com/viewtopic.php?f=35&t=7011

Thanks Brian, that covers it all. Thanks for posting this and for all the time it took you to produce it.
Happy Holidays!

[enggmaug]

I can say, now, in about a year of printing with my modified E3D and Kraken nozzles that I've had absolutely NO ISSUES with over 1000s of prints from small high detailed to large 12+ hour prints. I've received 100s - literally - of emails and PM from folks who have done the mod and had positive results. I've had a few who didn't. I really suspect that those who didn't have other issues that are not resolved. Extruding filament precisely and reliably is a complex process with lots of parameters. It takes a consistent, dedicated approach to resolving the gremlins, but one you do, the things you can make are amazing!

cheers,
Michael

Mickael, do you know if they solved the problem with the V6, or shall we keep on doing the mod with every new nozzle we get ?

I don't know about the 100's others, but it works beautifully for my machine. Thank you !

[mhackney]

I do not have a v6 but was told that they had significantly reduced the length of the bore along with other modifications. Perhaps folks here can chime in if they have a V6?s

Cheers,
Michael

[Highcooley]

Here are the V6 nozzle geometries according to E3D's drawings:
http://files.e3d-online.com/v6/Drawings ... LE-175.pdf

They do the last bit with a 1mm or 1.5mm drill. I don't know if this is to achieve a steeper overall angle than 60°.


I myself will probably hand drill the bore lengths, since cpompletely removing and remounting new ones to the printer would be a big pain with all the cabling, preheating etc.

According to various posts and the dimensions of the V6 nozzles, I am planning to go for 0.5mm for the 0.4mm nozzle, probably about 0.35-0.4mm for the 0.25mm nozzle and 0.8mm for the 0.6mm nozzle. Does anybody have different suggestions?

[mhackney]

Thanks for the link. I think their approach with the 2 step down to the bore makes sense and keeps enough metal so as not to drill through and ruin the nozzle with the larger drill. This would be especially important for nozzles for 3mm filament. I like the new V6 design. I don't have one but I am going to order one now for my son's mini kossel.

The other nice thing about knowing the bore length and overall hole geometry is it makes calculation good retract distances a lot better. With this design, I could reduce my retract and likely get better restart flow.

Hows the Rostock coming along now?

cheers,
Michael

[Highcooley]

Hows the Rostock coming along now?

Thank you for asking...well, this is the current state:
http://forum.seemecnc.com/viewtopic.php?f=54&t=7160