IMPORTANT Rudy was designed with aliexpress in mind. This means that a lot of unevenness, slop, and general China quality is already factored into the printed parts. The frame uses flextures to guarantee squareness, even if the metal parts are bent. Feel free to go for the cheapest listings you can find, or even print parts of the frame yourself (2020 beams are prime candidate for this).
| 2020 length | pieces | for what |
|---|---|---|
| 150mm | 6 | top and bottom squares |
| 150mm | 2 | bed carriage |
| pick a length | 4 | frame Z |
The length of the Z rails is going to be the length of your Z 2020 extrusions MINUS 50mm, so if you picked 200mm, then your rails are 150mm, which will give you about 120mm travel.
| Thing | Price | Link |
|---|---|---|
| mgn9c rail (Z length) x2 | - | keep scrolling |
| Thing | Price | Link |
|---|---|---|
| T8 leadscrew (Z length) P:2mm L:8mm | $2.50 | link |
| 5x8mm coupler * | $1 | link |
| Thing | Price | Link |
|---|---|---|
| extra belt (3m will have leftover for about 120mm Z) | ||
| extra F695 x2 (there will be enough leftovers) | ||
| one extra gt2 pulley | keep scrolling | |
| M5x35 screw (x40 works too, it will just stick out) | keep scrolling |
| Thing | Price | Link |
|---|---|---|
| Hardware | ||
| M3 sliding T-nuts x200 (2020 series) | $9 | link |
| M3x6 metric screws x200 | ||
| M3x8 metric screws x50 (for backup or accessories) | ||
| M3x25 (or longer) metric screws x3 | ||
| M3x20 x10 | ||
| M3x something between 10 and 20 x2 | ||
| M2x10 metric screws x2 (optional, hot glue is fine) | ||
| M5x40 metric screws x10 | ||
| M5 hex nut x2 | ||
| M3 (XD5.0XL4.0) inserts x100 (you need 20) | $7.34 | link |
| Motion | ||
| GT2 pulley x2 * | $6.34 | link |
| 6mm GT2 belt x3m | $7.61 | link |
| F695 bearing x20 | $23 | link |
| Cheaper F695 (they work fine) | $11 | link |
| mgn9c rail 150mm x3 * | $30 | link |
| 120mm voron 0 bed | $20 | link |
| 8x20mm bed springs | $2 | link |
| Electronics | ||
| 3x NEMA17 | $25 | link - pancake |
| other motor listing (cheaper if you wanna buy 5) | $38 | link |
| skr pico (or any tmc2209 mainboard) | $20-30 | pico |
| Orange Pi Zero 2 (or something to run klipper) | $30 | link |
| Limit switch x1 (MS-1A 13.5) | $1.50 | link |
| Power supply 24V (~120W) | $20-30 | link |
| Extruder (titan or bmg recommended) | $5-10 | titan link |
If you use bowden, just use whatever extruder you like, a voron m4 or a bmg clone is nice and cheap.
If you want to go bowden, warhead has support for sailfin, and will eventually have support for sherpa micro, so pick either of those (sailfin can be built from a $5 bmg kit)
// BOM subject to change