Ultimaker Belt Tensioner BANANA style (Rev. 3)
by vibrovirii, published
Since I liked the banana tuning from Jeremy: thingiverse.com/thing:45236
but some people might not want to change their blocks. So I designed a working version that one can bolt on existing UM blocks.
I prefer to use solid blocks from chasmaker: thingiverse.com/thing:22157. It allows me to bolt on the tensioner with small bolts.
Use 10mm M3 bolts for mounting to chasmakers blocks. If you use longer ones for the tensioner check if endswitches work. Leave everything else original on the blocks. So if you have wooden blocks with long bolts already through them. Just remove the nuts. Screw back the bolts a bit and then use the tensioner as replacement of your nuts. So the tensioning bolts on the lever stay unchanged. It's often just a hair of adjustment extra needed.
Cura settings: .4mm nozzle and wall thickness, 100% infill.
Rotate the tens-case stl file 180 else you have to bridge. Solidworks messed up. Troubles rotanting the assembly.
Solidworks parts and assembly added. Do with it as you please. Please do improve.
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im printing them out now. going to first try them with my original wooden blocks and see how they go. Great idea btw
Well chasmaker offers 2 versions, the solid one, or like the wood layers style, the wood style is 1 on 1 copy from i think a laser drawing, considering the bolt holes are 2.8 mm and not 3. Version 2 is a dimensionally correct copy with merged wood layers. Either way the end result is a copy of original dimensions. Since I imported the solid chasmaker block, sketched on the surface, converted entities, and extruded the sketch, so thats the reason in size change of the 4 bolt holes. And yes they use 30mm bolts, only the solid version of the blocks do not required to be holded together. So it saves you 4 30mm bolts. leaving empty bolt holes. Untabbed. Thats the reason i didn't change the 2.8 mm. So it will grib the thread of your bolt on a stock wooden linear block and replaces the 4 nuts. By knowing it has 2.8 mm holes, please do screw in a bolt before assembling, this way you create threading and assembly goes easier. cheers
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