Add doc/dimensions.md explaining correct rod lengths
[clinton/prusa3.git] / box_frame / doc / dimensions.md
1 # Here you can get all your rod lengths for i3 right.
2 If you are using single plate model, use *numbers*
3
4 ## Y axis
5 You need 2 smooth rods, 2 M10 rods and 4 M8 rods
6
7 ### Y smooth rod length is sum of:
8 * workarea (200mm)
9 * belt assembly parts (100mm) or outer dimensions of Y bearings (100mm for Prusa3ALU-FREZOVANY-v4.dxf)
10 * 40mm inside Y axis corners
11
12 for 340mm minimum. Use at least *350mm*
13 Take care they are cut exactly to the same length
14
15 ### Y threaded rods (M8):
16 Sum of:
17 * rod separation (170mm)
18 * Y axis corner (20mm)
19 * nuts and washers (15mm)
20
21 For *205mm*, or 210mm if you use nyloc nuts.
22 If your rods are cut right to the size (and are all exactly the same length) you will have easier time getting the frame right.
23
24 ### Y threaded rods (M10):
25 Y Smooth rod + 30mm, so *380mm*
26
27
28 ## X axis
29 You need 2 smooth rods
30
31 ### X axis smooth rod is sum of:
32 * workarea (200mm)
33 * x carriage width (85mm for box extruder, 58mm for single plate)
34 * 90 mm inside X end parts
35 For 375mm minimum with box model extruder. Its also box width, so *370*
36
37 ## Z axis
38 You need 2 smooth rods and 2 M5 threaded rods
39
40 ### Z axis smooth rod:
41 Box height - 50mm, so *320mm*
42 ### Z axis threaded rod
43 Smooth rod - 20mm, so *300mm*