ive got a taz 6 with the rambo board and am having bad luck with it. mainly prints are coming out inaccurate dimensionally compared to my other printers. i’m hoping to upgrade to a better board to have better accuracy, as i noticed with another machine just in changing to the 2209 steppers the print quality was much improved.
as i don’t want to spend $200+ to fix this machine, is there a firmware available for the btt002 or btt skr 1.4 board? it looks like the btt002 is the better option with the faster chip mhz and it appears the plugs look the same so wiring presumably would be much easier. i’m surprised i haven’t heard of anyone discussing this board as its only like $40.
i can go either with the washers or buy a bltouch, ive got the bltouch sitting around so if its better then ill put it in. how do i flash the board?
I don’t have any answers to your actual questions, but in general - just upgrading the board for “faster chip mhz” is not likely to affect quality of the prints as it’s kinda unlikely that the board/steppers are giving those problems. Dimensional accuracy would benefit from making sure all the steps are set correctly, both for the extruder and for the movement axes using a calibration cube… Have you done that? My Taz 6 started printing way better after I did a bunch of maintenance on it, compared to when I bought it off craigslist and the previous owner abusing the hell out of it…
If you look at my videos on Patreon, you will see I successfully converted a Mini to use the BTT002. The biggest problem though is that the fans are 5V rather than 24V on that board, so you will see I had to jerry-rig a solid state relay to get it to work with the existing fans.
You could do a TAZ 6, I suppose, but you won’t have enough steppers for dual-printing. And you would still need to use a solid-state relay or replace all the 24V fans.
I agree with @glebbb that adding a faster board won’t solve your printing issues. It will only add additional variables into play. I would recommend solving your printing problems before doing an upgrade.
Also, you did not explain whether you were using DO or LulzBot firmware. Official LulzBot firmware uses incorrect steps/mm (105 vs 100) in order to fudge for ABS shrinkage.
ive calibrated steps for the extruder and for x/y axes a few times, tightened the belts, even designed a better x axis carriage which borrows from the improvements made to taz pro:
this helped slightly and i’m getting smoother walls, but the main issue is it seems to be overextruding holes. i make parts that need inserts, and the inserts don’t fit in the holes for any of the parts this machine makes. everything is too tight. the exterior dimensions are exactly the same as my other printers. same stl file, same filament and same slicer settings on this machine vs my other machines, this one just doesn’t print the same. ive tried many settings and different slicers and keep running into the same issue. ive messed with flow rate but with a calibrated extruder i shouldn’t have to change it. another issue ive noticed is there is slight bulging at corners, such as when printing a square.
ive tried the default lulzbot firmware, DO, and also put klipper on it to see if that would help but it’s all coming out with the same issues. i figured it couldn’t hurt to change to smoother steppers and a better board which may give better quality, as i said i noticed a huge improvement with my other (non lulzbot) machines.
i also recently put in a hemera extruder so i can use 1.75 filament and noticed this helped a bit but i’m just surprised at how unsuccessful ive been getting this machine into production.