MTester Remix from DomesticHacks

thingiverse

-- READ THE PRINTING TIPS BELOW FOR BEST RESULTS --\r\n\r\nI'm impressed by the design of this case from DomesticHacks, particularly because it features a convenient cradle for the SMD test spot that prevents parts from falling into the interior.\r\n\r\nHowever, some part tolerances were very tight, and I wanted to make the top shallower and the bottom square so it would sit neatly on the workbench. In addition, the 9v battery was a super tight fit, so I enlarged that space slightly.\r\n\r\nI imported the DomesticHacks .STL files into F360 and re-drafted some of the parts to add 0.25mm clearance on the battery door. I also trimmed the height of the battery door by 0.25mm to account for the inevitable bridging sag when printing.\r\n\r\nNOTE: I HAVE NOT YET PRINTED THE NEW SLIGHTLY-MORE-SNUG BATTERY DOOR. I printed mine with 0.30mm clearance and it's a little loose, so I brought it down to 0.25 and it _should_ be perfect. _Should_ being the operative word. YMMV. My model is fine enough so there's no need to print another yet. If it's too snug for you, and you have Fusion360, you can adjust the clearances on the Fx Parameters page.\r\n\r\nHUGE THANKS to Domestic Hacks for providing the starting point for this project!\r\n\r\nPRINTING TIPS:\r\nThis is best printed at 0.25mm layer-height.\r\n\r\nPrint the back with the bottom on the print bed. Use supports for the battery compartment and the nut holes. I used 10% grid infill for this part, 5 top & bottom layers, and 4 perimeters. The 4 perimeters is crucial to prevent the nuts from camming out.\r\n\r\nPrint the faceplate/cover with the top on the print bed. (You'll need to flip it) Use supports for the SMD part "bridge" and also for the screw-holes. I used 15% infill for this part, 5 top & bottom layers, and 4 perimeters.\r\n\r\nPrint the battery cover with the bottom on the print bed. 5 top and bottom layers, 4 perimeters, and 15% infill.\r\n\r\nIF YOU PRINT ONE, I'D LOVE TO SEE IT!\r\n\r\nASSEMBLY TIPS:\r\nRather than risk camming the nuts, I used a flat punch to carefully tap the nuts into the tighter sections of the hexagonal holes.\r\n\r\nTrim any "elephant's foot" sticking out around the battery cover and port. \r\n\r\nA little CA glue holds the 8mm x 3mm magnets perfectly in place.\r\n\r\nFUSION 360 NOTES:\r\nI've documented most of the bodies and sketches. It's a hack in many ways, since F360 doesn't deal with interfaces between faceted mesh surfaces and its own "perfectly-formed" surfaces, ...but it works.\r\n\r\nIf you do a remix, please post the source too!