Mendel90 Build Manual
Sheets
Printed parts
So far the parts have only been tested in ABS.
NopHead prints the gears, pulleys and cable clips with a 0.35mm nozzle using 0.3mm layers. The pulleys don't fit the belt well when printed with a bigger nozzle, even at the same layer height, because the teeth are too rounded. The gears can be printed with a 0.4mm nozzle but the M8 nut will be tight to press in because the corners of the hexagon get too rounded.
All the other parts are printed with a 0.4mm nozzle and 0.4mm layers. The W/T ratio is 1.5 in both cases. These parameters are defined in the config.scad file and affect the minimum horizontal and vertical feature sizes. Changing them will affect all the printed parts and sheet drawings slightly.
The recommended infill density settings are as follows: -
| Fixing blocks, Wades block, Wades idler block, Wades small gear | 95% |
| Y bearing mounts, Z couplings | 75% |
| Z motor brackets | 75% hex |
| Bar clamps, Y belt anchors | 50% |
| X carriage, Y motor bracket | 50% hex |
| X idler bracket, X motor bracket | 25% hex |
| Everything else | 25% |
Printed with these setting the parts weigh about 400g, a little less than a Prusa. There are a lot more parts, but most are a lot smaller.
