Anyone know what's changed with the STLs on the MINI for R7?
The MINI got some updates to its STLs a day after the MK3. While all other parts have a verbose description of why the part was changed, all it says for the four new parts is "R7 and MINI+" which isn't particularly helpful. I know the general advice is "If the MINI is working then don't take it apart" but I just wanted to know what has actually changed in these new revised parts?
Best Answer by herbert:
Link the two topics together 🙂
https://forum.prusa3d.com/forum/hardware-firmware-and-software-help/new-parts-release-r7-and-mini/
Thanks
RE: Anyone know what's changed with the STLs on the MINI for R7?
As an addendum to the above, I've loaded the current files and the most recent obsolete revisions into a 3d modelling program, to compare the geometries. The following differences are apparent, though for the most part I can't see what they achieve (especially the widening of the Y axis rod separation and moving of the Y axis motor mount but not the Y axis idler mount - Surely the Y axis rods can't have been the wrong width apart since initial manufacture, and the belt path limits not lined up tangentially?)
Visible differences:
- The Y belt holder (R7 vs R6) has a longer slot for the lower belt, and a thicker bracket around the hole on that side.
- The Y plate front and Y plate rear (R7 vs R1) have both moved the leftmost Y axis rod further away from the rightmost Y axis rod by 0.53mm, along with the Y axis motor mount (though oddly, not the Y axis idler mount or the Y belt holder). This has extended the width of the plates by the same amount. The Y axis motor mount has a short circular peg sticking out of it now, and the idler mounting area has a new circular dimple in it along with a new 45 degree chamfer (presumably the chamfer is for strengthening and ease of printing). The holes to mount the plates to the aluminium frame are slightly larger.
- The Z bottom (R7 vs R4) has a few sharp edges cut off (presumably to prevent unprintable overhangs), a moved M3S nut slot (presumably for ease of printing again), some thinner M3 screw holes, and a moved Y motor cable hole (which is the sole change in all of these which is obvious in the new MINI assembly manual, and avoids the cable running externally at all).
RE: Anyone know what's changed with the STLs on the MINI for R7?
Link the two topics together 🙂
https://forum.prusa3d.com/forum/hardware-firmware-and-software-help/new-parts-release-r7-and-mini/
Thanks
RE: Anyone know what's changed with the STLs on the MINI for R7?
That's interesting. I didn't know you could click on the individual tags to get a description of all changes. Still, it would be nice if they added it to the description on the main STL page rather than bury it elsewhere 🙂
I'll print the bits off and change them over when I have to strip the printer down far enough for it to be of limited additional risk to future performance.