MendelMax
Revision as of 18:54, 9 December 2011 by Danielpublic (talk | contribs) (Worked on desc, poked around a bit as suggested in the bom while taking my time baking nomnom-sourdoughbread.)
Release status: working, needs user feedback.
| Description | A true reprap; printed brackets, with the rigidity of aluminium extrusions.
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MendelMax is a RepRap 3d printer using printed brackets and aluminium extrusions(suppliers) as structural elements. This gives a huge increase in rigidity for a minimal cost (self sourcing will cost about $50 more than a standard Prusa). This design also allows for faster to assemble (probably 4 hours for most users), a larger (and easier scaled) a bit bigger build area (~215x235x190 if built at the standard dimensions.), fewer parts to print, and easier to hack on.
Files (.stl's) are found for now at MendelMax thingiverse page. For now, have a look on the full assembly instructions see its homepage.
| Quantity | Description | Type | Size (mm) | Comments |
|---|---|---|---|---|
| 6 | 20x20mm | Aluminium Extrusions | 420 | Any 20x20mm extrusions will do just fine! Here is a list of suppliers. |
| 4 | 20x20mm | Aluminium Extrusions | 340 | |
| 4 | 20x20mm | Aluminium Extrusions | 300 | |
| 100 | Xmm (slot sized) | T-slot Nuts | - | |
| 84 | Screws | Fastener | M5 or 10mm | (Get 100) Small list on various suppliers. |
| 84 | Washers | Fastener | M5 or 10mm | (Get 100) Cheapest available. |
| 8 | Nuts | Fastener | M8 or 5/16" | Any will do but not Zinc coated, size matters. |
| 4 | Washers | Fastener | M8 or 5/16" | Get a bigger pack, cheap as peas. |
| 2 | Screws/bolts | Fastener | M8 or 5/16" 25mm/1" long | Shiny if preferred, size matters. |
| 12 | Linear Bushings | Bearings | M8 or 5/16" | Many choices there are, to quote Yoda. Ordinary felt/PTFE drilled rods/LM8UU/Igus G300 etc etc, size matters. |
| 7 | Bearing | Bearings | 608ZZ | Get a bigger pack, really useful! |
| 1 | T5-Timing | Belt | 900mm×5mm | X-axis. Length needs confirmation. |
| 1 | T5-Timing | Belt | 840mm×5mm | Y-axis. Length needs confirmation. (Also have a look at this page regarding 'choosing belts and pulleys' for alternatives.) |
| 2 | Rod | Smooth Rod | 8mm×~445mm | X-bar (Required: 3pcs á 1m) N.B: Called drillrod 304 Stainless Steel or A2 Tool Steel are recommended for smooth rods as it can help to prevent friction from rust and manufacturing (straightness) standards are higher. Rust issues can be prevented on the normal steel rods by maintaining a coat of oil. The smooth rods can also be cut from larger 3x1m pieces (see Smooth Rod Cut Order below). |
| 2 | Rod | Smooth Rod | 8mm×420mm | Y-bar |
| 2 | Rod | Smooth Rod | 8mm×405mm | Z-bar |
| 2 | Lead axis | Threaded Rod | 8mm×210mm | Z-bar 300mm (if you are to use thrust bearing 365-370mm for prolonging your steppers in the long run, do mind this is optional and can safely be choosen later, no rush! ) |
| 2 | Z couplings | Couplers | Steppershaft -> M8 | Could be printed or sourced on say Ebayurlthere |
| 5 | Bipolar Stepper | Motor | NEMA 17 | Have a look these suppliers. |
| 2 | Spring | 8mm ID | to eliminate backlash in the z axis | |
| 1 | Calibration | Straight object | 234mm | For frame alignment. Hardly needed, especially if the supplier cut the length for you. |
| 1 | Calibration | straight object | 290mm | Dito. |
| 1 | Electronics + endstops | Brains | This can be RAMPS, Sanguinololu, Gen6, Gen7, Gen3, or any other Mendel compatible electronics. Endstops are either optical switches or microswitches (Recommended) or a Reed switch as Hall-0 and you need three, one for each of the X, Y, Z axes. |
Smooth Rod Cut Order (when cutting from 1m lengths):
Rod 1: 420mm, 420mm Rod 2: 406mm, 406mm Rod 3: 350mm, 350mm
