Belted Ender by squirrelf
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Description
Huge thanks to my Patrons supporter without whom this would not exist.
To support my work, the material, time testing, and refining it consider joining my Patreon (also has the ApolloLander shroud) or Printables' club.
They have additional bearing and bottom axle size options, and you can request other tweaks as well. They will soon have ender3max support too.
STEP file included on my Patreon (also has Z linear rails mod - MGN12H)
You will also have access to my very chill discord community.
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No extended support or request here, I dedicate that limited time to my patrons.
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One working and tested novelty here is a self tensioning system using a spring ( two specific spring were tested, can be found on Amazon or aliexpress, see BOM ). and belt had excellent tension and both matched each other within 1hz
15mmx8mm yellow and red spring have been tested and work great. Red are stiffer, and what i ended up using on my setup.
You can technically not use the springs, and only use a screw in place of the spring (M4x16 or 18), where the screw head will push up, forcing the tensioner to go down, as you unscrew it.
To tension the belt easiest is to move the X axis as far up for easier screw head access.
I tested it on ender3v2 so no PSU in the way, but for ender3 and 3pro you will need to find a way to relocate the PSU or shift it further back
| quantity | ||||||
| Common Hardware | ||||||
| nema17 motors (40mm or less, but 48mm would likely work too) | 2 | motors can be anything under 40mm in length if you want it to not stick out. Stock Nema 17 32mm motor work, but would recommend those 39mm motor for better holding power while off | 17HS15-1504S-X1 - Amazon | 17HS15-1504S-X1 - omc-stepperonline.com | 17HS15-1504S1 - omc-stepperonline.com | |
| 188-GT2 6mm belts | 2 | Amazon | ||||
| GT2 belts - 6mm - 2meter or so | 2 | Amazon Yellow Spring | Amazon Red Srping | |||
| Springs - 15mm yellow or red spring (stiffer) | 2 | for self tensioning | ||||
| GT2 20t OR 16t timing pulley, with 5mm bore, for 6mm belts | 2 | for the motor axle — 20teeth would have a 10mm rotation distance, 16teeth would have an 8mm rotation distance in klipper | ||||
| M3x8 screws | 16 | to mount the motor and for belt clamps | ||||
| M5x8 screws | 16 | to secure parts to the extrusions | ||||
| M3 4mm long x 4.6mm or 5mm outer diameter threaded heat inserts | 8 | mechanically synced z will need 12 of them total | Amazon | Amazon | Amazon | Aliexpress |
| M4x20 to M4x25 — only when using yellow spinrgs | 2 | spring axle | ||||
| M4x25 to M4x30 — only when using red spinrgs | 2 | spring axle | ||||
| M4 hex nut | 2 | spring axle, installed in the tensioner | ||||
| M3x25 | 4 | for belt tensioner | ||||
| M5x40 | 6 | for v-wheel axle, you might have those already | ||||
| 8mmODx8.3x5ID spacers | 12 | for v-wheel axle, you might have those already — these can also be printed, file included | ||||
| Bottom 5mm axle | ||||||
| 60mm rod (or longer, but will stick out) - 5mm diameter | 2 | I recommend it having a flat side for the pulley to grab it better | Aliexpress | |||
| GT2 80teeth timing pulley - 5mm bore, for 6mm belt | 2 | mounted on the lower axle —— this can be printed, would require instead a GT2 20t timing pulley, but the metal one is best | ||||
| GT2 20t 5mm timing pulley - 5mm bore, for 6mm belt | 2 | mounted on the lower axle | ||||
| 625 bearing | 4 | |||||
| Bottom 8mm axle | ||||||
| 60mm rod (or longer, but will stick out) - 8mm diameter | 2 | |||||
| GT2 80teeth timing pulley - 8mm bore, for 6mm belt | 2 | mounted on the lower axle —— this can be printed, would require instead a GT2 20t timing pulley, but the metal one is best | ||||
| GT2 20t 8mm timing pulley - 8mm bore, for 6mm belt | 2 | mounted on the lower axle | ||||
| 688 bearing OR 148 bearing | 4 | 688: 8mmID - 16mmOD - 5mm thickness — 148: 8mmID - 14mmOD - 4mm thickness | Amazon 688 bearing | Amazon 148 bearing | ||
| Dual Individual Z (needs 5 stepper drivers) | ||||||
| GT2 20 idler pulley 5mm bore | 2 | for upper axis | ||||
| M5x16 or M5x20 | 2 | as the upper axis axle | ||||
| Mechanically Synced Z | ||||||
| 688 bearing OR 148 bearing | 4 | 688: 8mmID - 16mmOD - 5mm thickness — 148: 8mmID - 14mmOD - 4mm thickness | Amazon 688 bearing | Amazon 148 bearing | ||
| M3 4mm long x 4.6mm or 5mm outer diameter threaded heat inserts | 4 | Amazon | Amazon | Amazon | Aliexpress | |
| m3x6 screws | 4 | |||||
| 330 or 335mm rod x 8mm | 1 | to link both Z meachnically | ||||
| GT2 20t 8mm timing pulley - 8mm bore, for 6mm belt | 2 |
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