Added drag chain and upper holder with .scad for it #6
Conversation
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This seems to connect with a single T-nut and screw. Wouldn't it be better to take advantage of the T-slot extrusion and either make another 90˚ bend to fit 2 nuts (for stability) or make it snap directly onto the extrusion (like how this filament guide does)? |
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It is doable, however it would be more plastic. I found one screw sufficient, it never unscrewed on me. |
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Another alternative modification. On one piece of mjrice's smartmount you can see a small extra bulge of plastic next to a screw hole. That fits into the gap in the middle of the 2020 extrusion and stabilizes the piece preventing it from rotating. That's another possibility here. Although that might make it harder to print flat. |
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Could you upload a photo of this on a printer? What extruder head are you using? How did you orient your wires when constructing it? I started printing this out to try on my printer. It wasn't oriented the way I expected (though my expectations of what direction it would face were probably wrong). But more importantly, I found the wl/holder didn't seem to extend far enough. The chain was at least 2cm (in the Y) away from where my wires came up off my extruder. |
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Take a look at photos |
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Ah, so it's supposed to be on the left. I thought it would go on the middle or right to avoid interfering with any filament being guided into the extruder. So this profile of mount is designed for your bowden extruder. Additionally I have a mild concern about how the chain is in-line with the threaded rod. So if the chain is mounted differently, given enough extra links, or the head moves into just the right spot, the chain may hit the right z-axis threaded rod instead of bumping a non-moving part or clearing the printer entirely. |
- Fix .scad so it actually compiles - Fix the name of the scad file - Add 0.4mm to the screwhole diameter (I found it a little tight) - Redesign chain holder to use variables and be customizable Redesigned scad supports these customizations: - Variable bar length (based on a parameter indicating how many mm the wires are offset from the 2020 extrusion). - Screw padding (so slightly longer screws can secure the holder) - Multiple optional screwhole locations, 1 inside and 2 outside Added a chain holder with settings that should work for the Wilson's direct drive extruder (assuming you orient the wires upwards): - 56mm wire offset - 2mm screw padding (most of the wilson parts have 4mm+ between the screw head and the T-slot) - 2 screw holes on the outside (should secure the longer bar better)
This can add support and in some cases fix issues printing this part some printers (i.e. my printer) can have.
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I've forked this tree and made some updates to it. NeoTheFox/wilson@master...dantman:chain
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Wow, this is very cool, thanks! |
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