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README.md: further clarify endstop board.

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zruncho3d 2022-07-24 23:23:14 -04:00 • committed by GitHub
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@ -169,7 +169,7 @@ This BOM preview is for Alpha-4, though there's no expectation that these parts
| 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.
| Z Drives | F623 bearings | 6 | Idlers | | Z Drives | F623 bearings | 6 | Idlers |
| Bed | Sexbolt endstop kit | 1 | Adding a sexbolt endstop kit enables Auto-Z and is highlight recommended; optionally, repurpose the original Z endstop and use the ZeroClick probe as a virtual endstop in Klipper to remove this added requirement. | | Bed | Sexbolt endstop kit | 1 | Adding a sexbolt endstop kit enables Auto-Z and is highlight recommended; optionally, repurpose the original Z endstop and use the ZeroClick probe as a virtual endstop in Klipper to remove this added requirement. Yes, the microswitch will need to flipped to the other side if your hartk endstop board comes pre-soldered, so ideally ask for a not-yet-soldered one. |
| Frame | Guitar Feet | 4 | Optional; same as used with Voron Trident. Can use original V0.1 rubber feet instead. | Frame | Guitar Feet | 4 | Optional; same as used with Voron Trident. Can use original V0.1 rubber feet instead.
In addition, you'll need parts for ZeroClick, plus some way to get extra drivers. In addition, you'll need parts for ZeroClick, plus some way to get extra drivers.