Dual gear extruder drive
I am thinking of changing my single gear extrder on my CR10 to a dual gear system.
I have the choice of Bondtech, Bondtech clone (both with 3:1 reduction) or going with a dual gear drive without gear reduction.
backlash with a gear reduction drive - is it an issue and should I stay with an un-geared system?
Does a clone setup at about 1/4 of the price of the real thing produce a good result or will I get substantially more precision by going with the real Bondtech (the prices are just nuts)
What can I expect for a maximum retract speed with the 3:1 gear ?
I tried a lot of clone extruders until I got my first Bondtech. Once I used it, I started replacing everything else I had as I could afford it. To your questions:
- Backlash - non issue.
- Clone - Can't answer that without knowing which clone. And even then, I couldn't answer, I've always purchased the real ones.
- Max retract speed - don't know the math, because this has been a non-issue.
Me personally, I won't have anything else.
Great, thanks! Not what I wanted to hear but I suspected that would be likely the way it would go.
$179 CDN ... ouch ..... for a BMG-X2.
Maybe someone will chime in with a good clone.
All the ones I have are BMGs (no X2), Still $79.85 USD at Printed Solid.
Veti last edited by
I am waiting for confirmation from my supplier but I think the BMG-X2 can only be used with the Chimera/Cyclops in a direct extruder configuration rather than a bowden setup. I am not yet prepared to go direct.
The extruder for a CR-10 is $115 CDN each with no motor (the BMG-X2 was a two extruder configuration with motors). Last night I decided to blow $17 CDN for a Chinese clone to see what I get. I fully expect it to be lower quality but by the time taxes are included the real thing is about ten times (!!!) the cost of a clone which is crazy.
My curiosity will be satisfied by the end of January.
Re the Hermera, I would like to stick with my Chimera setup for now.
Keep us posted! It will be very interesting to see how that all works out.
cdl1701yahoo.com last edited by
I have had a bondtech QR, Bondtech BMG and the BMG x2 as well as a few clones, I ended up designing and printing my own gear housings and just using the gears from them. The Clone gears wear out much faster than the genuine bondtech gears so now I just buy bontech gears and parts.
I have customized my housings to work with the printer design I am working with rather than conforming to the standard Bondtech designs. I highly recommend going dual gear over single gear, you will not regret it.
Just a side note on the BMG x2, I never did get it working to my satisfaction although that was not a reflection on the extruder but more on the E3D Chimera (genuine). I personally cannot recommend the Chimera/Cyclops as a hotend.
The only issue I have with the Chimera is it's tendency to string with a Volcano hot end but I always felt that was due to the large melt chamber in the Volcano.
I am looking forward to receiving the clone BMG. If the concept improves things to the extent everybody says it does then I don't mind spending money on the original but spending that kind of money without feeling confident on the result seems a bit foolish.
Can you confirm that the BMG-X2 can not be used in a bowden tube setup ?
antlestxp last edited by
I'm not ashamed to say the TriangleLabs bmg clones work the same as the originals. I bought the clone to see how I would like them. Then bought the originals to support the company that actually put in the RnD. Sorry to say they print exactly the same. I will always say support genuine products but if cost is a limiting factor, majority of the stuff coming out of trianglelabs is top notch. Side note, the TL e3d titan clones are actually better than the original e3d products.
Good to know! Here is hoping ....
zapta last edited by
what about the new e3d Hemera? i am intrigued by it but waiting for the smaller motor version.
I presume for a direct extruder configuration. Same here though in a recent video, Tom compared overall weights and if I recall correctly, it was not as bad as it looks.
The hemera has a very short path from the extruder to the nozzle. Same for some metal BMG clones that uses the extruder body as a heatsink.
cdl1701yahoo.com last edited by
The x2 is not designed to be used with a bowden set up but that does not mean that it cannot be modified to work. Here is an image of the bottom of the main body of mine.
I suppose you could drill out the plastic holes to fit a push-in fitting for the bowden tube.
Thanks ! That is exactly the view I was looking for and that isn't published anywhere.
Probably doesn't even need to be drilled out, just print a tight fitting press fit internally threaded adapter to fit into the recess, screw in a regular pneumatic fitting and Bob is your uncle. I use that method in a couple of other areas and it's working well.
Good to know that this is another option.
cdl1701yahoo.com last edited by cdl1701yahoo.com
The dimensions of those larger diameter holes is 10mm diameter x 5mm deep.
the depth of the internal hole is about 17mm that fits the PTFE tube.