3dprint/tri-zero
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A liiiiiiittle more than 450mm is needed for each belt

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Bump to 500mm to be sure though.
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Zruncho 2022-02-16 22:05:24 -08:00
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@ -164,7 +164,7 @@ This BOM preview is for Alpha-4, though there's no expectation that these parts
| Fasteners | M3 BHCS (various) | Yes | For Z idlers (vertical), Z idler attachments (horizontal), motor mounts, skirts, +lots more | Fasteners | M3 BHCS (various) | Yes | For Z idlers (vertical), Z idler attachments (horizontal), motor mounts, skirts, +lots more
| Fasteners | M3 nuts | Yes | | Fasteners | M3 nuts | Yes |
| Fasteners | M3 heatset inserts | Yes | For motors, bed mounts (2 + 3), motor skirts (4x3), z belt attachment (4) and more | Fasteners | M3 heatset inserts | Yes | For motors, bed mounts (2 + 3), motor skirts (4x3), z belt attachment (4) and more
| Z Drives | GT2 belt | 3x~450mm | | Z Drives | GT2 belt | 3x~500mm |
| Z Drives | GT2 16t pulleys | 3 | | Z Drives | GT2 16t pulleys | 3 |
| Z Drives | MGN7H 150mm | 2 | Ideally upgrade to MGN9C on the X carriage and then get only one of these to repurpose for a front Z drive. See the nte below. | Z Drives | MGN7H 150mm | 2 | Ideally upgrade to MGN9C on the X carriage and then get only one of these to repurpose for a front Z drive. See the nte below.
| Z Drives | NEMA14 or NEMA17 motors | 3 | Needs to have enough hold torque. Mid-size (33mm body length) NEMA14 are marginal, while long (48mm body length) NEMA14 or most mid-to-large NEMA17 will provide enough unpowered hold torque to keep the bed from dropping. Ideally 0.9mm for extra resolution. Mix and match should be fine. Use what you've got. The Z drive motors barely matter. | Z Drives | NEMA14 or NEMA17 motors | 3 | Needs to have enough hold torque. Mid-size (33mm body length) NEMA14 are marginal, while long (48mm body length) NEMA14 or most mid-to-large NEMA17 will provide enough unpowered hold torque to keep the bed from dropping. Ideally 0.9mm for extra resolution. Mix and match should be fine. Use what you've got. The Z drive motors barely matter.