Editing RepRap Mendel i2 (section)

=== Extruder (Print-head) ===

[[Image:Wade's Extruder.jpeg|thumb|right|Wade's extruder design]]

==== Filament transport mechanics ====

{| class="wikitable sortable" border="1"
|-
! scope="col" | Quantity
! scope="col" | Description
! scope="col" class="unsortable" | Comments
! scope="col" | Available
|-
| 2 || 608 bearings, skateboard bearings ||  ||style="background: yellow"| ordered
|-
| 1 || M8×50 half-threaded bolt || to be hobbed, M8×60 has a longer smooth part, allows a second lock-nut, and may be easier to find  ||style="background: yellow"| have (to be hobbed)
|-
| 1 || (M)8×20 Threaded rod ||  ||style="background: lightgreen"| have
|-
| 1 || M8 nut || Nyloc works better, but a pair of nuts will also work  ||style="background: lightgreen"| have a pair of nuts (maybe also nyloc)
|-
| 4-5 || M8 washers || to space the large gear clear of the motor retaining bolt heads  ||style="background: lightgreen"| have
|-
| 1 || 608 bearing, skateboard bearing ||  ||style="background: lightgreen"| have
|-
| 4 || M4×60 or M4×45 hex head bolts || Hex head will work best (they won't turn), and longer than 45 mm will be easier to assemble if you can find them.  ||style="background: yellow"| have round (allen) head
|-
| 2 || M4×20 bolts ||  ||style="background: lightgreen"| have
|-
| 2 || M4 nuts || ||style="background: lightgreen"| have
|-
| 4 || M4 wing nuts || normal hex nuts will do also.  ||style="background: lightgreen"| have
|-
| 10 || M4 washers ||  ||style="background: lightgreen"| have
|-
| (16) || M4 washers || optional; 4 washers on each M4X45 idler bolt between the main block and the idler block will limit the idler travel and make reloading filament easier.  ||style="background: lightgreen"| have
|-
| 4 || ~4mm ID springs || Sized to fit over an M4 bolt, unsprung length of 10-12mm, each spring providing 25-35N load. For a given filament drive force, you'll need about twice the spring force - i.e., if you want 100N of filament drive, your springs need to push with about 50N each.  ||style="background: yellow"| have maybe
|-
|colspan="4"|NOTE: Some users have their extruders working without springs, but springs are recommended. A good source for these springs is in the cloth-cabinet on spring loaded skirt-hangers or trouser-hangers. Just cut the right length off the springs.
|-
| 2 || M3×35 bolts || ||style="background: lightgreen"| have maybe (will be cut otherwise)
|-
| 3 || M3×10 bolts || Low profile bolt heads might work better here  ||style="background: lightgreen"| have
|-
| 7 || M3 washers ||  ||style="background: lightgreen"| have
|-
| 3 || M3 nuts ||  ||style="background: lightgreen"| have
|-
| 1 || M3 grub screw || To secure the pulley, ideally 8mm long, but anything 6mm+ should be fine  ||style="background: lightgreen"| have
|-
| 1 || 2.5mm drill || See [http://reprap.org/wiki/Wade%27s_Geared_Extruder#The_Hot_End_Mount RepRap Hot End]  ||style="background: red"| missing
|-
| 1 || NEMA 17 bipolar stepper motors || 49 Ncm (70 oz*in) works well; at very least 40Ncm (57 oz*in)  ||style="background: yellow"| ordered
|}

==== Hot end nozzle ====

<div style="background: red">
: missing
</div>