Prusa Mendel iteration 2/ru
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Release status: working
Description | Prusa Mendel Iteration 2 is a simpler remix of normal Mendel.
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Contents
Введение
Prusa Mendel версии 2 является улучшением Prusa Mendel iteration 1/ru и выпущен в ноябре 2011.
Основные изменения и улучшения
Список основных улучшений второй версии по сравнению с оригинальной Prusa
- Больше деталей сделана путем печати
- каретки размещены на втулках или линейных подшипниках(в зависимости от версии)
- Nut traps were added to parts that were attached with M3 screws (e.g. endstop holders etc.)
- Вторая кровать убрана (Нагревательный стол является второй кроватью)
- Ролики были изменены с Т5 на Т2.5, рекомендуется приобрести профессиональные ремни
- Большинство винтов М4 изменены на М3
- A printed plastic belt guide was designed to replace the large M8x30 fender washers
- Переработан фиксатор ремня
Развитие проекта
Развитие и новые файлы Prusa Mendel размещаются на github: http://github.com/prusajr/PrusaMendel.
История
- Блог по созданию Prusa версии 2Iteration 2 announcement
- Отличия между первым и вторым вариантом Prusa показанные Гарри ХадсономThis page
Печатные детали
В [Github repository] находятся STL модели всех файлов, которые должны быть напечатаны для изготовления Prusa 2. Выберете "generate-metric.bat" (или одни их файлов линейных подшипников) для скачивания STLs моделей. Необходимо установить OpenSCAD или другую программы открывающую STL.
Список печатных деталей (напечатать или купить):
Части для Уэйд экструдера, так же входят в файл STL версии 2:
Количество | STL файл | Рисунок модели |
---|---|---|
1 | Основание (Wade.stl) | |
1 | Шестерня большая (wade-big.stl) | |
1 | Шестерня малая (wade-small.stl) |
Непечатные детали
Derived from parts list by Kliment
Quantity | Description | Comments |
---|---|---|
Fasteners | ||
100 | M8 nut | Easier to buy a box of 100, spares are handy. Enough for Wade's extruder too |
100 | M8 washer | Easier to buy a box of 100, spares are handy. Enough for Wade's extruder too |
50 | M3×20 bolt | Enough for Wade's extruder too |
50 | M3 nut | Enough for Wade's extruder too |
50 | M3 washer | Enough for Wade's extruder too |
6 | M3x10 bolt | |
2 | M3x8 grub screw | |
1 | M8x50 grub screw | |
6 | M8x30mm fender washer | Used during assembly instructions, but not necessary if bearing-guide.stl is used instead. |
Bearings | ||
10 | LM8UU (Asia) or LME8UU (US, Europe) linear bearings OR 8mmx25mm brass bushings |
If using linear bearings, don't cut costs here. Cheap ones can damage the smooth rods. |
3 | 608 "roller skate" bearings | "6082RS" for sealed, "608ZZ" for shielded. Again, don't skimp. |
Rods - threaded lengths can all be cut from 6x1m lengths of M8 threaded rod | ||
6 | 370mm M8 threaded rod | Three per side |
4 | 294mm M8 threaded rod | Front/rear. Can use 300mm too |
3 | 440mm M8 threaded rod | Top/Bottom. Can use 450m too |
2 | 210mm M8 threaded rod | z-axis lead screws. Can use 300mm too |
2 | 350mm 8mm smooth rod | |
2 | 405mm 8mm smooth rod | |
2 | 420mm 8mm smooth rod | |
Belts | ||
1 | 840mm GT2 toothed belt | T2.5 can be used as well. Be sure to match the pulleys. If you really want you can use T5 but it's not advised. |
1 | 900mm GT2 toothed belt | T2.5 can be used as well. Be sure to match the pulleys. If you really want you can use T5 but it's not advised. |
2 | 16-tooth pulleys to fit GT2 belts | Can be 12-tooth, but 16 is advised for less backlash. Bore diameter should be 5mm. |
Other | ||
2 | 1.5cm vinyl tubing, 6.35mm OD 4.32mm ID (3cm total) | Used to attach motors to the Z axis threaded rods. Can be found at most hardware stores, typically used in toilets to connect refill tube to outlet. |
If using Wade's extruder as included in the STLs:
Quantity | Description | Comments |
---|---|---|
Fasteners | ||
4 | M8 washers | Included in count above |
2 | M8 nuts | Included in count above |
6 | M3 nuts | Included in count above |
3 | M3x10 bolts | |
3 | M3x40 bolts | |
1 | M3x8 grub screw | |
1 | M8x20 grub screw | |
1 | M8 hobbed bolt | |
Bearings | ||
3 | 608 "roller skate" bearings | "6082RS" for sealed, "608ZZ" for shielded. |
Электронника
Шаговые двигатели
The Prusa iteration 2 uses 5 NEMA17 stepper motors, including the extruder. Two of these motors, the Z axis motors, are connected to the same stepper driver of the electronics. If using Wade's Extruder, its stepper motor needs a minimum holding torque of 40Ncm (0.4Nm). More information can be found on the Stepper Motor page.
Контроллер
About any RepRap controller works for the Prusa iteration 2. Required features: 4 stepper drivers, 1 thermistor input and 1 heater output for the extruder and optionally another thermistor/heater pair for the heated bed. Choosing the best one for your printer is mostly a matter of taste. For comparisons, see List of electronics, Comparison of Electronics and Alternative Electronics.