Alright, THIS is what's been giving me grief. This is the reprint with all one spool of filament - rather than the hodgepodge of two different brands of white that looked awful and cracked because it didn't fit.
The dovetails are tapered with one tapered top to bottom and the smaller tapered bottom to top. The idea is taken from NeedItMakeIt's video on joining prints.
Can ya tell what it is yet?!
Now this is what was frustrating me. These are my test print in Sunlu black PETG with zero clearance and it fitted perfectly. The black one before that with 0.1mm (0.05 per side) was too loose! Then the white one is my 2nd test print in white because the fit was completely differently to the black.
Had to add taper to the longest dovetail and also 0.1mm of clearance but left the others as they were - they were short enough that a tap of a hammer should seat them.
And the finished article with 3mm steel dowel pins just to really make sure. It's just under 300g of filament per side....'cos I didn't want it to break
Sides are 3-4mm, bottom is 10mm (for the dovetails mainly) and it's 4 wall with 25% crosshatch infill.
Why so much swearing? Well, if you look along the long edge, you'll see a line all the way round it about 9-10mm up from the bottom. Yeah, that's not in the model and prints every time...except the cut-down joint tests where it doesn't happen. No idea why (answers on a postcard please!) but it seems to be at the start of the top layers that sit on the infill. I designed in a recessed channel on the 2nd part to try and stop it interfereing in the dovetail...because 0.12mm of ridge (on each side) is a problem when you have zero clearance. There's another sort of layer shift on one part (left side of this pic) towards the top. That's annoying but not functionally problematic.
There's probably one question left: Why?! Well, obviously the original cracked - I think it got overstuffed at Christmas and the wedging action cracked the bottom out. There must be replacements available I hear you say! Well, that's what I thought but they're £30-odd quid plus shipping and take up to three weeks. Neither part of that was appealing!
The dovetails are tapered with one tapered top to bottom and the smaller tapered bottom to top. The idea is taken from NeedItMakeIt's video on joining prints.
Can ya tell what it is yet?!
Now this is what was frustrating me. These are my test print in Sunlu black PETG with zero clearance and it fitted perfectly. The black one before that with 0.1mm (0.05 per side) was too loose! Then the white one is my 2nd test print in white because the fit was completely differently to the black.
Had to add taper to the longest dovetail and also 0.1mm of clearance but left the others as they were - they were short enough that a tap of a hammer should seat them.
And the finished article with 3mm steel dowel pins just to really make sure. It's just under 300g of filament per side....'cos I didn't want it to break
Sides are 3-4mm, bottom is 10mm (for the dovetails mainly) and it's 4 wall with 25% crosshatch infill.
Why so much swearing? Well, if you look along the long edge, you'll see a line all the way round it about 9-10mm up from the bottom. Yeah, that's not in the model and prints every time...except the cut-down joint tests where it doesn't happen. No idea why (answers on a postcard please!) but it seems to be at the start of the top layers that sit on the infill. I designed in a recessed channel on the 2nd part to try and stop it interfereing in the dovetail...because 0.12mm of ridge (on each side) is a problem when you have zero clearance. There's another sort of layer shift on one part (left side of this pic) towards the top. That's annoying but not functionally problematic.
There's probably one question left: Why?! Well, obviously the original cracked - I think it got overstuffed at Christmas and the wedging action cracked the bottom out. There must be replacements available I hear you say! Well, that's what I thought but they're £30-odd quid plus shipping and take up to three weeks. Neither part of that was appealing!
