Set TRAMMING_SCREW_THREAD to 40 for Ender 3 Printers #873
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Change to 50mm offset from edge for tramming points to allow the points to be balanced while allowing for a 50mm NOZZLE_TO_PROBE_OFFSET.
config/examples/Creality/Ender-3 Pro/BigTreeTech SKR Mini E3 2.0/Configuration_adv.h
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| @@ -1034,7 +1034,7 @@ | |||
| #if ENABLED(ASSISTED_TRAMMING) | |||
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| // Define positions for probe points. | |||
| #define TRAMMING_POINT_XY { { 20, 20 }, { 180, 20 }, { 180, 180 }, { 20, 180 } } | |||
| #define TRAMMING_POINT_XY { { 50, 50 }, { 185, 50 }, { 185, 185 }, { 50, 185 } } | |||
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Since tramming points will depend on your probe type & placement relative to the nozzle, it's probably best to leave these as Marlin's defaults.
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We do want to tram where the screws are, if possible, so the default should probably go for those points, and then it can be adjusted for a probe that can't reach.
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See my comment in #872 (comment)
Stock screw locations on Ender-3/5 beds are TRAMMING_POINT_XY { { 32.5, 32.5 }, { 202.5, 32.5 }, { 202.5, 202.5 }, { 32.5, 202.5 } }, but they may not be reachable depending on where the probe is located relative to the nozzle.
Ex: If your probe is to the left of the hotend, you may not be able to reach the screw heads on the right side of the bed or if your probe is to the right of the hotend, you may not be able to reach the screw heads on the left side of the bed.
It really depends on your probe/mount/probe offsets/x & y min & max positions.
Undo all changes other than TRAMMING_SCREW_THREAD 40
zanhecht
changed the title
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I'll leave the tramming points discussion for another time, and redefine this pull request to just changing the screw thread. I expanded it to all Ender 3 variants while I was at it. |
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Requirements
Description
Specify that the Ender 3 uses M4 bed screws.
Benefits
Provides correct values for screw size if the ASSISTED_TRAMMING option is enabled.
Related Issues
Updated version of #872, rebaselined to 2.1.x.