I am looking into building the Lowrider CNC machine. I am about to 3D print the parts. However, there is not much information regarding nozzle size, I mostly 3D print with 0.8 and 1.0 mm nozzles. In the instructions, it is suggested to use 2-3 walls and %20-30 infill. I assume these settings are for a standard 0.4 nozzle, but if I use a bigger one, I guess I can reduce the wall count and infill %. Has anybody used this nozzle size and if so, what tweaks would you suggest me to use on the model to get a similar use of material as with a standard size nozzle? Or is it better to print with a smaller nozzle due to the parts design?
Seen a few people successfully use 0.6mm nozzle, myself included. Don’t remember seeing larger nozzles used, would be interesting to learn about the largest nozzle people managed to use. Slicer improvements in Cura 5+ (and some other slicers) added dynamically vary extrusion width, which should help pull off details with larger nozzles, but you may want to keep layer height relatively low compared to the normal value of 80%. Glad I did bunch of max reliable extrusion tests, also dimension and extrusion calibration cube tests before printing parts. The LR3 parts have some tight tolerances, everything connected great except for one part where the belt retaining slot was too loose.
Thanks for sharing all those details! Your build looks amazing. I think I will go for the print with a 0.6 nozzle. At this stage, I want to go for a proven printing method, I was afraid that using 1.0 nozzle would cause problems with tolerances, I usually print in vase mode where this type of nozzle is more useful. Will start printing today and hopefully can share my build soon!
I did all mine with a .8 nozzle using super slicer, 2 walls 31% infill on my BIQU B1 SE Plus. So far assembly has gone pretty good, I haven’t tried any ziptie holes yet tho…
I justs finished building a primo and all parts were printed with a .8 nozzle using PLA. It just drew a perfect square and I have not tried the duel end stops yet. I think a big nozzle makes things a little tight to fit. Here were my issues:
The biggest problem was holding the belts. Somewhere I have a post on this but I forget the title. Look for Primo Belt Holder or something like that. I milled out the center island of the part and just pushed in a 1/4 inch metal dowel. Worked great.
I did have to sand down the sides a bit with coarse sandpaper to get them to fit the square holes they fit in.
Sometimes I had to file down the ridges formed by the big nozzle to make things fit. A course file worked fine and I did not have to file very much.
Nuts often did not want to fit the hexagon holes printed to capture them. I just heated them up with a soldering iron as I pulled them in. Sometimes I then melted and pushed plastic around the edges of the nut to be sure they did not pop back out. I had to do this for the nut holding parts that go inside the steel tube in the core.
On the whole I am happy with the build and would use .8 again as it kepts the print times to under 12 hours even for the biggest parts.
