WolfStrap
Main Body
Wooden Parts
| Quantity
|
Description
|
Type
|
Comments
|
| 2 |
445x18x45mm |
Board |
Drawer slides X-axis
|
| 2 |
200x18x45mm |
Board |
Drawer slides Z-axis
|
| 1 |
300x18x45mm |
Board |
Attachment for the captive nut, Y-axis
|
| 2 |
50x18x45mm |
Board |
Attachment for the captive nut, X-axis and Z-axis
|
| 2 |
415x18x70mm |
Board |
Base Frame
|
| 2 |
450x18x70mm |
Board |
Base Frame
|
| 2 |
350x18x70mm |
Board |
Vertical frame, X-axis
|
| 1 |
160x18x70mm |
Board |
Z-axis, extruder mount
|
| 1 |
110x18x70mm |
Board |
Z-axis, motor mount
|
| 1 |
300x400x18mm |
Board |
Bed. A 5 mm plywood may be used to reduce mass.
|
Everything is plain softwood. The cheap kind from the hardware store. (It is not intended to be long lasting) Be carefull to choose only straight boards and planks. Leave the warped behind. If you intend for the machine to last longer, better quality wood can be used and glued together as well as using screws.
All dimensions are rough measurments, some adaptations will be required.
Non-Wooden Parts
| Quantity
|
Description
|
Type
|
Comments
|
| 2 |
250mm |
Rail |
Come in pairs. Four total rails.
|
| 1 |
450mm |
Rail |
Come in pairs. Two total rails.
|
| - |
4x25mm SPAX screws |
Fastener |
A good handful of screws (Ex. Spax)
|
| - |
3x15mm SPAX screws |
Fastener |
A good handful of screws
|
| - |
4x35mm SPAX screws |
Fastener |
A good handful of screws
|
| 3 |
NEMA 17 bipolar stepper motors |
Stepper |
Be sure to get ones with at least 20mm of shaft length
|
| 6 |
100x100mm brace |
Fastener |
Corner braces for base frame (Ex. Corner Brace)
|
| 4 |
120x120mm brace |
Fastener |
Flat corner braces for base frame
|
| Option 1: Threaded Rods
|
| 2 |
M10x350mm |
Threaded rod |
X-Y-axis
|
| 1 |
M5x200mm |
Threaded rod |
Z-axis
|
| 4 |
M10 nut |
Fastener |
X-Y-axis. 2 per axis.
|
| 2 |
M5 nut |
Fastener |
Z-axis. 2 per axis.
|
| 3 |
Aquarium tubing |
Misc |
Coupling purposes
|
| 4 |
Hose clamp |
Misc |
Coupling purposes
|
| Option 2: Timing Belt
|
| 1 |
840mm×5mm T5 pitch timing belt |
Belt |
Y-axis
|
| 1 |
900mm×5mm T5 pitch timing belt |
Belt |
X-axis
|
| 1 |
M8x18cm |
Threaded rod |
Z-axis
|
| 3 |
M8 nut |
Fastener |
Z-axis
|
| 1 |
M8 brass plug |
Fastener |
|
| 1 |
Cable tie |
Fastener |
|
| 4 |
60mm chair angle |
Fastener |
|
| Optional
|
| 4 |
608 roller skate / inline skate / skateboard bearing |
Bearing |
|
The seat angle can be quite easy to convert with holders for 42mm flange NEMA17 steppers (see below) In Mendel timing belt kit is usually included in a Z-strap width 16mm. For one need only one Mendel 5mm wide, after splitting then remains a second.
Extruder
Printed Parts
Non-Printed Parts
| Quantity
|
Description
|
Type
|
Comments
|
| Feeder
|
| 2 |
608 bearings, skateboard bearings |
Bearings |
|
| 1 |
M8X50 bolt |
Fastener |
to be hobbed, M8x60 has a longer smooth part, allows a second lock-nut, and may be easier to find
|
| 1 |
M8 nut |
Fastener |
Nyloc works better, but a pair of nuts will also work
|
| 4-5 |
M8 washers |
Fastener |
to space the large gear clear of the motor retaining bolt heads
|
| Idler
|
| 1 |
608 bearing, skateboard bearing |
Bearings |
|
| 1 |
(M)8X20 |
Threaded rod |
|
| 4 |
M4X60 or M4X45 hex head bolts |
Fastener |
Hex head will work best (they won't turn), and longer than 45 mm will be easier to assemble if you can find them.
|
| 4 |
M4 nuts |
Fastener |
typically wing nuts
|
| 8 |
M4 washers |
Fastener |
|
| 4 |
~4mm ID springs |
Spring |
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.
|
| 16 |
M4 washers |
Fastener |
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.
|
| 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.
|
| Hot End Mount
|
| 2 |
M3X35 bolts |
Fastener |
|
| 4 |
M3 washers |
Fastener |
|
| 2 |
M3 nuts |
Fastener |
|
| 1 |
2.5mm drill |
|
See section Hot End
|
| Stepper Motor Mount
|
| 3 |
M3X10 bolts |
Fastener |
Low profile bolt heads might work better here
|
| 3 |
M3 washers |
Fastener |
|
| 1 |
M3 grub screw |
Fastener |
To secure the pulley, ideally 8mm long, but anything 6mm+ should be fine
|
| 1 |
M3 nut |
Fastener |
To secure the pulley
|
| Stepper Motor
|
| 1 |
NEMA 17 bipolar stepper motors |
Stepper |
5 kg*cm works well; Kysan 42BYGH4803 is what I used. Should be capable of creating a holding torque of at least 40Ncm, at the very least.
|
| Extruder Mount
|
| 2 |
M4X20 bolts |
Fastener |
|
| 2 |
M4 nuts |
Fastener |
|
| 2 |
M4 washers |
Fastener |
|
