E3D Hemera vs Biq h2

[nzimmers]

So I have both of these extruders - I got the Hemera right when it came out (mine is actually branded Hermes ~ shhhhh!), and picked up the Biq H2 about a month ago.  While heavier than the Biq h2 the Hermea is heavier and dimensionally larger it functions flawlessly - I have not found a single issue with the way it performs - it's consistent in all the operations and in the print quality and I usually print in the 40-50mm/s range for perimeter.  

The Biq h2 on the other hand has been a headache - the lower weight doesn't really make a difference since I find that the print speed needs to be kept very low (20mm/s or lower) otherwise there's inconsistent extrusion resulting in blobbing and and poor surface quality.   One of my biggest gripes is filament change - I have about a 30% success rate -  seems there a heat creep issue and the filament is soft enough that it separates on retraction near the top of the path and leaving enough material to block new filament and requiring disassembly to clear the blockage. 

Maybe I'm doing things wrong - would like to hear from others who have the Biq H2 and their experience. 

currently intending on replacing the Biq H2 with another Hemera. 

[LukeH]

That is interesting. I had heard reasonable reports on the H2. I was even considering it as a potential replacement for the Orbiter I’m using now, if I decide I can’t live with the Orbiter’s shortcomings.

What stepper currents are you running?

[Gary Tolley - Grogyan]

What Orbiter shortcomings are you referring to?

The fact that it is SLS nylon?
Voron team use another fan to keep the Orbiter/Galileo cool

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[Haze Gray]

Thanks for the question Luke - my current for the BiqH2 was set at 0.800 amps - I've bumped it up to 1.200 and will see if that makes a difference.  

[Luke Hartfiel]

Gary,

The filament path on the Oribiter is lacking. A couple of times so far it has been so problematic loading and unloading filament that I’ve literally had to pull the damn thing apart to get the filament feeding out the other side of the gears and down the spout to the heat block.

Also, while the planetary gearbox is good, the tiny NEMA14 stepper running at a maximum of 0.4A, is not enough to extrude really fast - I’ve basically had to drop down from a 0.8mm nozzle to a 0.6mm nozzle, and reduce layer heights to get it to run without skipping.

On 10 May 2021, at 9:54 am, Gary Tolley - Grogyan <gro...@gmail.com> wrote:



[Haze Gray]

Well I bumped up the current but didn't see any improvement - and I had the same issues with the filament and the resulting disassembly that's required.  I'm going to install a Hemera on that printer and see how the quality is with that setup. 

[TobyCWood]

I've had one serious clog in the Hemera. It was so bad I had to dissemble everything to clear it. Otherwise it's been reliable.

[Gary Tolley - Grogyan]

Hemera is fine for me, just very heavy.

The issues with the Orbiter are strange, when seeing ludicrously high print speeds with it

https://www.youtube.com/watch?v=El-b-29CR5A

Vorons use bearings on their orbiter variant, called galileo, which is the only difference

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[Luke Hartfiel]

I’m still tinkering, but it seems that 0.8mm nozzle at 0.4mm layers at 100mm/s is out of reach, so no Super Volcano for me. :)

But a 0.6mm nozzle with 0.2mm layers and 200mm/s (i.e. Volcano flow rates) might be possible. I’m still working up. Certainly it didn’t skip at 150mm/s…

On 11 May 2021, at 6:25 am, Gary Tolley - Grogyan <gro...@gmail.com> wrote:



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