I'm building a printer that should have a X Axis compatible with the Prusa products. :- 8mm di rods 45mm centre to centre with the X axis stepper 1/2 way between the rods. I picked this combination because it has so many options available but there in lies the problem.
I don't want to pick a printhead setup at random can you please recommend those that work.best?
Direct drive and Boden.
I'm afraid the fundamental difference between bowden & DD mean you wont be able to pick 1 carriage that is ideally suited to both uses.
The best you can do is pick a carriage that is "universal" & has mounting points for both extruder types
Something like this >>>> https://www.thingiverse.com/thing:2514659
I'm aware that it's Bowden or direct drive and currently I'm leaning towards direct drive, the mounting bracket you linked looks like a good start thanks.
So now I need suggestions about what print head assembly to use with it, preferably one using a BL touch your sensor.
What age your thoughts on the print head for the Bear upgrade? Although it seems to include a backplate.
HI I wasn't trying to make you aware as much as get you to think about why one is better or worse for your intentions
The bear extruder looks very much like the extruder found on the Prusa MK2, 2.5 & 3's
While it has been widely used with success it also has its drawbacks. The main issue i dont like is that it uses a heavy standard sized stepper motor and the motor is cantilevered quite a distance from the "load carrying" rails
I think the use of a BMG clone extruder and pancake stepper motor makes more sense. Direct drive has my preference for 2 main reasons . It can handle flexible filament and retractions are effective
Something like https://sea.banggood.com/Nema-17-Stepper-Motor-+-BMG-Extruder-Clone-Dual-Drive-Upgrade-Bowden-Extruder-Kit-For-1_75mm-filament-3D-Printer-p-1451229.html?utm_source=googleshopping&utm_medium=cpc_organic&gmcCountry=SG&utm_content=minha&utm_campaign=minha-sg-sea-en-pc¤cy=SGD&createTmp=1&utm_source=googleshopping&utm_medium=cpc_bgs&utm_content=sxxx&utm_campaign=ssc-sg-sea-sinx-spa-0523&ad_id=437327958428&gclid=Cj0KCQiA48j9BRC-ARIsAMQu3WT3qY48KsgiLDKKOJJfawx-vLYVRe_OtK2vIffd13MgTrl0K99F07caAs--EALw_wcB&cur_warehouse=CN
Maybe something like this >>https://www.thingiverse.com/thing:3721746
Thanks Phil, that is tidy looking print head and probably just what I want. I'm considering a pancake stepper to drive the X axis there won't be that much weight on X and it would ease the burden on the Y stepper.
Yup, all things told that's about as good and cost effective as it gets. I've run both original Titan & a BMG clone and much prefer the BMG.
I'm not sure a pancake stepper on the X axis is a good idea. Remember power is not only responsible for speed and torque but also how quickly and effectively an axis can change direction. An under powered stepper may lead to missed steps !! For the extruder a few missed steps wont have a visible impact on your prints, but on X or Y it definitely will.
We can run pancake steppers on BMG & E3D Titan clone extruders because the extruder internals are geared so torque isn't a problem.